Java文件操作大全

ne3g 9年前發布 | 20K 次閱讀 Java 

1.創建文件夾
//import java.io.*;
File myFolderPath = new File(%%1);
try {
if (!myFolderPath.exists())
myFolderPath.mkdir();
}
catch (IOException e) {
System.err.println("新建目錄操作出錯");
}


2.創建文件
//import java.io.*;
File myFilePath = new File(%%1);
try {
if (!myFilePath.exists())
myFilePath.createNewFile();
FileWriter resultFile = new FileWriter(myFilePath);
PrintWriter myFile = new PrintWriter(resultFile);
myFile.println(%%2);
myFile.flush();
resultFile.close();
}
catch (IOException e) {
System.err.println("新建文件操作出錯");
}


3.刪除文件
//import java.io.*;
File myDelFile = new File(%%1);
try {
if(myDelFile.delete())
{
%%2
}
}
catch (IOException e) {
System.err.println("刪除文件操作出錯");
}


4.刪除文件夾
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
f.delete();
}
}
folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File((String)folderList.getLast());
if (file.delete())
folderList.removeLast();
else {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
folderList.add(files[i].getPath());
}
}
}


5.刪除一個文件下夾所有的文件夾
/
import java.io.;
private static LinkedList<String> folderList=null;
*/
File delfile=new File(%%1);
File[] files=delfile.listFiles();
for(int i=0;i<files.length;i++){
if(files[i].isDirectory()){
if(!files[i].delete()){
folderList = new LinkedList<String>();
folderList.add(files[i]);
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory())
folderList.add(files[i].getPath());
else
fileList.add(files[i]);
}
for (File f : fileList)
f.delete();
}
folderList = new LinkedList<String>();
folderList.add(files[i]);
while (folderList.size() > 0) {
File file = new File((String)folderList.getLast());
if (file.delete())
folderList.removeLast();
else {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
folderList.add(files[i].getPath());
}
}
}
}
}
}


6.清空文件夾
//import java.io.*;
File delfilefolder=new File(%%1);
if (!delfilefolder.exists() && !delfilefolder.delete()){
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(delfilefolder.getAbsolutePath());
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory())
folderList.add(files[i].getPath());
else
fileList.add(files[i]);
}
for (File f : fileList)
f.delete();
}
folderList = new LinkedList<String>();
folderList.add(delfilefolder.getAbsolutePath());
while (folderList.size() > 0) {
File file = new File((String)folderList.getLast());
if (file.delete())
folderList.removeLast();
else {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
folderList.add(files[i].getPath());
}
}
}
}
delfilefolder.mkdir();


7.讀取文件
//import java.io.*;
7.1.操作系統默認編碼
FileReader fr=new FileReader(%%1);
BufferedReader br = new BufferedReader();
String %%2=nul;
try {
while ((%%2 = reader.readLine()) != null) {
%%3
}
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
br.close();
fr.close();
} catch (IOException e) {
e.printStackTrace();
}
}


7.2.UTF-8編碼
FileInputStream fis=new FileInputStream(new File(%%1));
InputStreamReader read = new InputStreamReader(fis,"UTF-8");
BufferedReader reader=new BufferedReader(read);
String %%2=null;
try {
while ((%%2 = reader.readLine()) != null) {
%%3
}
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
br.close();
read.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}


7.3.分塊讀取
FileInputStream fis=new FileInputStream(new File(%%1));
byte[] buffer=new byte[10240];
try {
int byteread;
while ((byteread=fis.read(buffer)) != -1) {
String %%2=new String(buffer);
%%3
}
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
read.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}


8.寫入文件
//import java.io.*;
8.1.操作系統默認編碼
try {
FileWriter fw = new FileWriter(%%1);
fw.write(%%2);
fw.flush();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}


8.2.UTF-8編碼
try {
OutputStreamWriter out = new OutputStreamWriter(
new FileOutputStream(%%1),"UTF-8");
out.write(sb.toString());
out.flush();
out.close();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (FileNotFoundException e){
e.printStackTrace();
} catch (IOException e){
e.printStackTrace();
}


9.寫入隨機文件
//import java.io.*;
try {
RandomAcessFile logFile=new RandomAcessFile(%%1,"rw");
long lg=logFile.length();
logFile.seek(%%2);
logFile.writeByte(%%3);
}catch(IOException ioe){
System.out.println("無法寫入文件："+ioe.getMessage());
}


10.讀取文件屬性
//import java.io.*;
// 文件屬性的取得
File af = new File(%%1);
if (af.exists()) {
System.out.println(f.getName() + "的屬性如下： 文件長度為：" + f.length());
System.out.println(f.isFile() ? "是文件" : "不是文件");
System.out.println(f.isDirectory() ? "是目錄" : "不是目錄");
System.out.println(f.canRead() ? "可讀取" : "不");
System.out.println(f.canWrite() ? "是隱藏文件" : "");
System.out.println("文件夾的最后修改日期為：" + new Date(f.lastModified()));
} else {
System.out.println(f.getName() + "的屬性如下：");
System.out.println(f.isFile() ? "是文件" : "不是文件");
System.out.println(f.isDirectory() ? "是目錄" : "不是目錄");
System.out.println(f.canRead() ? "可讀取" : "不");
System.out.println(f.canWrite() ? "是隱藏文件" : "");
System.out.println("文件的最后修改日期為：" + new Date(f.lastModified()));
}
if(f.canRead()){
%%2
}
if(f.canWrite()){
%%3
}


11.寫入屬性
//import java.io.*;
File filereadonly=new File(%%1);
try {
boolean %%2=filereadonly.setReadOnly();
}
catch (IOException e) {
System.err.println("拒絕寫訪問："+e.printStackTrace());
}


12.枚舉一個文件夾中的所有文件
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
List<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory())
folderList.add(files[i].getPath());
else
fileList.add(files[i]);
}
for (File f : fileList) {
%%2=f.getAbsoluteFile();
%%3
}
}


13.復制文件夾
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
LinkedList<String> folderList2 = new LinkedList<String>();
folderList2.add(%%2+ %%1.substring(%%1.lastIndexOf("\")));
while (folderList.size() > 0) {
(new File(folderList2.peek())).mkdirs(); // 如果文件夾不存在 則建立新文件夾
File folders = new File(folderList.peek());
String[] file = folders.list();
File temp = null;
try {
for (int i = 0; i < file.length; i++) {
if (folderList.peek().endsWith(File.separator))
temp = new File(folderList.peek() + File.separator


    

  • file[i]);
else
temp = new File(folderList.peek() + File.separator
    • 

  • file[i]);
if (temp.isFile()) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(new File(
folderList2.peek() ,temp.getName().toString()));
byte[] b = new byte[10240];
int len;
while ((len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
}
else if (temp.isDirectory()) {// 如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
    • 

  • File.separator + f.getName());
}
else if(f.isFile()) {
FileInputStream input = new FileInputStream(f);
FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());
byte[] b = new byte[10240];
int len;
while ((len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
}
}
}
}
} catch (IOException e) {
System.err.println("復制整個文件夾內容操作出錯");
}
folderList.removeFirst();
folderList2.removeFirst();
}
    • 



14.復制一個目錄下所有的文件夾到另一個文件夾下
/
import java.io.;
import java.util.;/
File copyfolders=new File(%%1);
File[] copyfoldersList=copyfolders.listFiles();
for(int k=0;k<copyfoldersList.length;k++){
if(copyfoldersList[k].isDirectory()){
List<String>folderList=new ArrayList<String>();
folderList.add(copyfoldersList[k].getPath());
List<String>folderList2=new ArrayList<String>();
folderList2.add(%%2+"/"+copyfoldersList[k].getName());
for(int j=0;j<folderList.size();j++){
(new File(folderList2.get(j))).mkdirs(); //如果文件夾不存在 則建立新文件夾
File folders=new File(folderList.get(j));
String[] file=folders.list();
File temp=null;
try {
for (int i = 0; i < file.length; i++) {
if(folderList.get(j).endsWith(File.separator))
temp=new File(folderList.get(j),file[i]);
else
temp=new File(folderList.get(j),file[i]);
FileInputStream input = new FileInputStream(temp);
if(temp.isFile()){
FileOutputStream output = new FileOutputStream(new File(folderList2.get(j) ,temp.getName()).toString()));
byte[] b = new byte[10240];
while ( (int len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
}
else if(temp.isDirectory()){//如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()


    

  • File.separator + f.getName());
}
else if(f.isFile()) {
FileInputStream input = new FileInputStream(f);
FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());
byte[] b = new byte[10240];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
}
}
}
}
}
catch (IOException e) {
System.err.println("復制整個文件夾內容操作出錯");
}
}
}
}
    • 



15.移動文件夾
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
LinkedList<String> folderList2 = new LinkedList<String>();
folderList2.add(%%2 + %%1.substring(%%1.lastIndexOf("\")));
while (folderList.size() > 0) {
(new File(folderList2.peek())).mkdirs(); // 如果文件夾不存在 則建立新文件夾
File folders = new File(folderList.peek());
String[] file = folders.list();
File temp = null;
try {
for (int i = 0; i < file.length; i++) {
if (folderList.peek().endsWith(File.separator)) {
temp = new File(folderList.peek() , file[i]);
} else {
temp = new File(folderList.peek() ,file[i]);
}
if (temp.isFile()) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(
folderList2.peek() + File.separator


    

  • (temp.getName()).toString());
byte[] b = new byte[10240];
while ((int len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
if (!temp.delete())
//刪除單個文件操作出錯
}
else if (temp.isDirectory()) {// 如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
    • 

  • File.separator + f.getName());
}
else if (f.isFile()) {
FileInputStream input = new FileInputStream(f);
FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());
byte[] b = new byte[10240];
while ((int len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
if (!temp.delete())
//刪除單個文件操作出錯
}
}
}
}
} catch (IOException e) {
//復制整個文件夾內容操作出錯
e.printStackTrace();
}
folderList.removeFirst();
folderList2.removeFirst();
    • 



}
File f = new File(%%1);
if (!f.delete()) {
for (File file : f.listFiles()) {
if (file.list().length == 0)
file.delete();
}
}


16.移動一個目錄下所有的文件夾到另一個目錄下
/
import java.io.;
import java.util.;/
File movefolders=new File(%%1);
File[] movefoldersList=movefolders.listFiles();
for(int k=0;k<movefoldersList.length;k++){
if(movefoldersList[k].isDirectory()){
List<String>folderList=new ArrayList<String>();
folderList.add(movefoldersList[k].getPath());
List<String>folderList2=new ArrayList<String>();
folderList2.add(%%2+File.separator+movefoldersList[k].getName());
for(int j=0;j<folderList.size();j++){
(new File(folderList2.get(j))).mkdirs(); //如果文件夾不存在 則建立新文件夾
File folders=new File(folderList.get(j));
String[] file=folders.list();
File temp=null;
try {
for (int i = 0; i < file.length; i++) {
if(folderList.get(j).endsWith(File.separator))
temp=new File(folderList.get(j),file[i]);
else
temp=new File(folderList.get(j),file[i]);
FileInputStream input = new FileInputStream(temp);
if(temp.isFile()){
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(new File(folderList2.get(j),temp.getName().toString()));
byte[] b = new byte[10240];
while ( (int len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
temp.delete();
}
else if(temp.isDirectory()){//如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()


    

  • File.separator + f.getName());
}
else if (f.isFile()) {
FileInputStream input = new FileInputStream(f);
FileOutputStream output = new FileOutputStream(folderList2.peek()+File.separator+temp.getName()+File.separator+ f.getName());
byte[] b = new byte[10240];
while ((int len = input.read(b)) != -1)
output.write(b, 0, len);
output.flush();
output.close();
input.close();
if (!temp.delete())
//刪除單個文件操作出錯
}
}
}
}
catch (IOException e) {
//復制整個文件夾內容操作出錯
e.printStackTrace();
}
}
movefoldersList[k].delete();
}
}
    • 



17.以一個文件夾的框架在另一個目錄創建文件夾和空文件
/
import java.io.;
import java.util.;/
boolean b=false;//不創建空文件
List<String>folderList=new ArrayList<String>();
folderList.add(%%1);
List<String>folderList2=new ArrayList<String>();
folderList2.add(%%2);
for(int j=0;j<folderList.size();j++){
(new File(folderList2.get(j))).mkdirs(); //如果文件夾不存在 則建立新文件夾
File folders=new File(folderList.get(j));
String[] file=folders.list();
File temp=null;
try {
for (int i = 0; i < file.length; i++) {
if(folderList.get(j).endsWith(File.separator))
temp=new File(folderList.get(j),file[i]);
else
temp=new File(folderList.get(j),file[i]);
if(temp.isFile() && b)
temp.createNewFile();
else if(temp.isDirectory()){//如果是子文件夾
folderList.add(folderList.get(j)+File.separator+file[i]);
folderList2.add(folderList2.get(j)+File.separator+file[i]);
}
}
}
catch (IOException e) {
//復制整個文件夾內容操作出錯
e.printStackTrace();
}
}


18.復制文件
//import java.io.*;
File oldfile = new File(%%1);
try {
if (oldfile.exists()) { //文件存在時
FileInputStream inStream = new FileInputStream(oldfile); //讀入原文件
FileOutputStream fs = new FileOutputStream(new File(%%2,oldfile.getName()));
byte[] buffer = new byte[10240];
int byteread;
while ( (byteread = inStream.read(buffer)) != -1)
fs.write(buffer, 0, byteread);
inStream.close();
}
}
catch (IOException e) {
//復制單個文件操作出錯
e.printStackTrace();
}


19.復制一個目錄下所有的文件到另一個目錄
//import java.io.*;
File copyfiles=new File(%%1);
File targetfiles = new File(%%2);
if (!targetfiles.exists())
targetfiles.mkdirs();
File[] files=copyfiles.listFiles();
for(int i=0;i<files.length;i++){
if(files[i].isFile()){
try {
InputStream inStream = new FileInputStream(files[i]); //讀入原文件
FileOutputStream fs = new FileOutputStream(new File(%%2,files[i].getName()));
byte[] buffer = new byte[10240];
int byteread;
while ( (byteread = inStream.read(buffer)) != -1)
fs.write(buffer, 0, byteread);
inStream.close();
} catch (IOException e) {
//復制單個文件操作出錯
e.printStackTrace();
}
}
}


20.提取擴展名
String %%2=%%1.substring(%%1.lastIndexOf('.'));


21.提取文件名
String %%2=%%1.substring(%%1.lastIndexOf("\")+1);


22.提取文件路徑
String %%2=%%1.substring(0,%%1.lastIndexOf("\"));


23.替換擴展名
//import java.io.*;
File replaceExt=new File(%%1);
replaceExt.renameTo(replaceExt.getName().split(".")[0]+"."+%%2);


24.追加路徑
final String path=%%1.endsWith("\")?%%1:%%1+"\";
%%3=path+%%2;


25.移動文件
//import java.io.*;
File oldfile = new File(%%1);
try {
if (oldfile.exists()) { //文件存在時
InputStream inStream = new FileInputStream(oldfile); //讀入原文件
FileOutputStream fs = new FileOutputStream(new File(%%2,oldfile.getName()));
byte[] buffer = new byte[10240];
int byteread;
while ( (byteread = inStream.read(buffer)) != -1)
fs.write(buffer, 0, byteread);
inStream.close();
oldfile.delete();
}
}
catch (IOException e) {
//復制單個文件操作出錯
e.printStackTrace();
}


26.移動一個目錄下所有文件到另一個目錄
//import java.io.*;
File movefile=new File(%%1);
File[] movefiles=movefile.listFiles();
for(int i=0;i<movefiles.length;i++){
if(movefiles[i].isFile()){
File oldfile = new File(movefiles[i]);
try {
if (oldfile.exists()) { //文件存在時
InputStream inStream = new FileInputStream(oldfile); //讀入原文件
FileOutputStream fs = new FileOutputStream(new File(%%2,oldfile.getName()));
byte[] buffer = new byte[10240];
int byteread;
while ( (byteread = inStream.read(buffer)) != -1)
fs.write(buffer, 0, byteread);
inStream.close();
oldfile.delete();
}
}
catch (IOException e) {
//復制單個文件操作出錯
e.printStackTrace();
}
}
}


27.指定目錄下搜索文件
//import java.io.;
private static final String filter=%%1; //".*"
private static void doSearch(String path){
File file = new File(path);
if(file.exists()) {
if(file.isDirectory()) {
File[] fileArray = file.listFiles();
for(File f:fileArray) {
if(f.isDirectory()) {
doSearch(f.getPath());
} else {
if(f.getName().indexOf(filter) >= 0) {
//f.getPath()
}
}
//f.getPath()
}
//"The numbers of files had been found:" + countFiles
} else {
//"Couldn't open the path!"
}
} else {
System.err.println("目錄不存在");
}
}
doSearch(%%1);


28.打開對話框
/
import java.io.;
import javax.swing.;/
JFileChooser Jfc = new JFileChooser(); //建立選擇檔案對話方塊盒 Jfc
Jfc.showDialog(null, %%1);
if (Jfc.getSelectedFile() != null) {
File %%2 = Jfc.getSelectedFile();
}


29.文件分割
//import java.io.*;
try {
File f=new File(%%1);
FileInputStream fileInputStream = new FileInputStream(f);
byte[] buffer = new byte[fileInputStream.available()];
FileInputStream.read(buffer);
fileInputStream.close();
String strFileName = f.getName();
FileOutputStream fileOutputStream = new FileOutputStream(new File(%%2+"\"+ strFileName + "1"));
fileOutputStream.write(buffer,0,buffer.length/2);
fileOutputStream.close();
fileOutputStream = new FileOutputStream(new File(%%2+"\"+ strFileName + "2"));
fileOutputStream.write(buffer, buffer.length/2, buffer.length-buffer.length/2);
fileOutputStream.close();
} catch (ArrayIndexOutOfBoundsException e) {
e.printStackTrace();
}
catch(IOException e){
e.printStackTrace();
}


30.文件合并
//import java.io.*;
String strFileName = %%1.substring(%%1.LastIndexOf("\") + 1);
try {
FileInputStream fileInputStream1 = new FileInputStream(new File(%%2 + strFileName + "1"));
FileInputStream fileInputStream2 = new FileInputStream(new File(%%2 + strFileName + "2"));
byte[] buffer = new byte[fileInputStream1.available()+fileInputStream2.available()];
FileInputStream.read(buffer, 0, fileInputStream1.available());
FileInputStream2.read(buffer, fileInputStream1.available(), fileInputStream2.available());
fileInputStream.close();
fileInputStream2.close();
FileOutputStream fileOutputStream = new FileOutputStream(new File(%%2+"\"+ strFileName));
fileOutputStream.write(buffer,0,buffer.length);
fileOutputStream.close();
}
catch(IOException e){
e.printStackTrace();
}


31.文件簡單加密
/
import java.io.;
import javax.swing.;
private static final String CharSet = "0123456789ABCDEF";/
JFileChooser jfc = new JFileChooser();
JFileChooser jfc2 = new JFileChooser();
jfc.showDialog(null, "請選擇要加密編碼的文件");
jfc2.showDialog(null, "請選擇要輸出的文件名");
if (jfc.getSelectedFile() != null && jfc2.getSelectedFile() != null) {
File oldfile = jfc.getSelectedFile();
FileInputStream inStream = null;
FileWriter fw = null;
try {
if (oldfile.exists()) {
inStream = new FileInputStream(oldfile);
fw = new FileWriter(jfc2.getSelectedFile());
byte[] sRead = new byte[10240];
int byteread;
while ((byteread = inStream.read(sRead)) != -1) {
StringBuilder smi = new StringBuilder(byteread  2);
int ka = 3, kb = 5, kc = 2, kd = 7, js = 0;
if (byteread % 2 != 0)
js = 1;
for (int i = 0; i < byteread - 1; i += 2) {
char c1 = (char) sRead[i];
char c2 = (char) sRead[i + 1];
int tmp = ka  c1 + kc  c2;
while (tmp < 0)
tmp += 1024;
byte s1 = (byte) (tmp % 1024);
int js1 = (int) s1 >> 4 & 0xf;
smi.append(CharSet.substring(js1, js1 + 1));
int ks1 = s1 & 0xf;
smi.append(CharSet.substring(ks1, ks1 + 1));
tmp = kb  c1 + kd * c2;
while (tmp < 0)
tmp += 1024;
byte s2 = (byte) (tmp % 1024);
int js2 = (int) s2 >> 4 & 0xf;
smi.append(CharSet.substring(js2, js2 + 1));
int ks2 = s2 & 0xf;
smi.append(CharSet.substring(ks2, ks2 + 1));
}
if (js == 1) {
byte s3 = (byte) ((sRead[byteread - 1] - 4) % 1024);
int js3 = (int) s3 >> 4 & 0xf;
smi.append(CharSet.substring(js3, js3 + 1));
int ks3 = (int) s3 & 0xf;
smi.append(CharSet.substring(ks3, ks3 + 1));
}
fw.write(smi.toString());
}
fw.flush();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fw.close();
inStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}


32.文件簡單解密
/
import java.io.;
import javax.swing.;
private static final String CharSet = "0123456789ABCDEF";/
private static int niyuan(int m, int n) {
int a, b, c, d, t, yu = 0, shang, mod;
a = m;
b = n;
mod = a;
c = 0;
d = 1;
while (b < 0)
b += a;
if (a % b == 0 || b % 2 == 0)
return 0;
while (b != 1) {
t = a % b;
shang = a / b;
a = b;
b = t;
yu = c - shang  d;
c = d;
d = yu;
}
if (yu < 0)
yu += mod;
return yu;
}
JFileChooser jfc = new JFileChooser();
JFileChooser jfc2 = new JFileChooser();
jfc.showDialog(null, "請選擇要解碼解密的文件");
jfc2.showDialog(null, "請選擇要輸出的文件名");
if (jfc.getSelectedFile() != null && jfc2.getSelectedFile() != null) {
FileOutputStream fw = null;
try {
FileInputStream fis = new FileInputStream(jfc.getSelectedFile());
fw = new FileOutputStream(jfc2
.getSelectedFile());
byte[] buffer = new byte[20480];
int ka = 3, kb = 5, kc = 2, kd = 7, js = 0, tmp;
int aany, ddny;
int r00 = ka  kc  kd;
int r01 = -ka  kb  kc;
int r10 = -kb  kc  kc;
int r11 = ka  kb  kc;
int x00 = ka  ka  kc  kd - ka  kb  kc  kc;
int x11 = ka  kb  kc  kd - kb  kb  kc  kc;
while (x00 % 2 == 0) {
x00 /= 2;
r00 /= 2;
r01 /= 2;
}
while (x11 % 2 == 0) {
x11 /= 2;
r10 /= 2;
r11 /= 2;
}
aany = x00;
ddny = x11;
if (niyuan(1024, aany) != 0 && niyuan(1024, ddny) != 0) {
int kn00 = r00  niyuan(1024, x00);
int kn01 = r01  niyuan(1024, x00);
int kn10 = r10  niyuan(1024, x11);
int kn11 = r11  niyuan(1024, x11);
ka = kn00;
kb = kn01;
kc = kn10;
kd = kn11;
} else {
JOptionPane.showMessageDialog(null, "無逆矩陣！");
System.exit(0);
}
while (ka < 0)
ka += 1024;
while (kb < 0)
kb += 1024;
while (kc < 0)
kc += 1024;
while (kd < 0)
kd += 1024;
ka %= 1024;
kb %= 1024;
kc %= 1024;
kd %= 1024;
try {
int byteread;
while ((byteread = fis.read(buffer)) != -1) {
int nLen = byteread / 2;
byte[] sming = new byte[nLen];
String chs=new String(buffer,"US-ASCII");
for (int i = 0; i < nLen; i++) {
byte bTmp;
if (byteread < 2)
bTmp = -1;
bTmp = (byte) (CharSet.indexOf(chs.substring(i  2,i  2+1))  16 + CharSet
.indexOf(chs.substring(i  2 + 1,i  2 + 2)));
sming[i] = bTmp;
}
if (nLen % 2 != 0)
js = 1;
for (int i = 0; i < nLen - 1; i += 2) {
char c1 = (char) sming[i];
char c2 = (char) sming[i + 1];
tmp = ka  c1 + kc  c2;
while (tmp < 0)
tmp += 1024;
char s1 = (char) (tmp % 1024);
fw.write(s1);
tmp = kb  c1 + kd  c2;
while (tmp < 0)
tmp += 1024;
char s2 = (char) (tmp % 1024);
fw.write(s2);
}
if (js == 1) {
char c3 = (char) ((sming[nLen - 1] - 4) % 1024);
fw.write(c3);
}
}
fw.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fis.close();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}


33.讀取ini文件屬性
/
import java.io.;
import java.util.;
import java.util.regex.;
private static HashMap configMap=null;
private static FileReader fileReader = null;
/
private static boolean readIni() {
if (configMap == null) {
configMap = new HashMap<String, ArrayList>();
String strLine = null;
String currentNode = null;
String previousNode = null;
ArrayList<Properties> vec = new ArrayList<Properties>();
int row = 0;
BufferedReader bufferedReader = new BufferedReader(fileReader);
try {
while ((strLine = bufferedReader.readLine()) != null) {
String oneLine = strLine.trim();
if (oneLine.length() >= 1) {
Pattern p = Pattern.compile("\[\s.\s\]");
int nodelen = oneLine.split("[;]").length;
String[] strArray1 = new String[4];
if (nodelen == 1) {
oneLine = oneLine.split("[;]")[0].trim();
} else if (nodelen == 2) {
strArray1[3] = oneLine.split("[;]")[1].trim();
oneLine = oneLine.split("[;]")[0].trim();
}
Matcher m = p.matcher(oneLine);
if (m.matches()) {
strArray1[0] = "@Node";
strArray1[1] = oneLine;
strArray1[2] = "";
} else {
int keylen = oneLine.split("=").length;
if (keylen == 1) {
strArray1[0] = "@Key";
strArray1[1] = oneLine.split("=")[0];
strArray1[2] = "";
} else if (keylen == 2) {
strArray1[0] = "@Key";
strArray1[1] = oneLine.split("=")[0];
strArray1[2] = oneLine.split("=")[1];
} else {
strArray1[0] = "@ElementError";
strArray1[1] = "";
strArray1[2] = "";
strArray1[3] = "";
}
}
if (strArray1[0].equals("@Node")) {
previousNode = currentNode;
currentNode = strArray1[1];
if (row > 0) {
configMap.put(previousNode, (ArrayList)vec.clone());
vec.clear();
row = 0;
}
} else if (strArray1[0].equals("@Key") && row == 0) {
Properties ht = new Properties();
ht.setProperty(strArray1[1], strArray1[2]);
vec.add(ht);
row++;
} else if (strArray1[0].equals("@Key") && row > 0) {
Properties ht2 = new Properties();
ht2.put(strArray1[1], strArray1[2]);
vec.add(ht2);
row++;
}
}
}
configMap.put(currentNode, (ArrayList)vec.clone());
} catch (FileNotFoundException e) {
configMap = null;
e.printStackTrace();
return false;
} catch (IOException e) {
configMap = null;
e.printStackTrace();
return false;
}
}
return true;
}
try {
fileReader = new FileReader(%%1); //"Setup.ini"
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
if (readIni()) {
ArrayList<Properties> li = null;
li = (ArrayList<Properties>) configMap.get(%%2); //"[DataSource]"
for (Properties pro : li) {
if(pro.containsKey(%%3))
%%4=pro.getProperty(%%3);
}
}
try {
fileReader.close();
} catch (IOException e) {
e.printStackTrace();
}


34.合并一個目錄下所有的文件
//import java.io.*;
File combinefiles=new File(%%1);
File[] files=combinefiles.listFiles();
FileOutputStream fs;
try {
fs=new FileOutputStream(new File(%%2));
}
catch(IOException e){
e.printStackTrace();
}
for(int i=0;i<files.length;i++){
if(files[i].isFile()){
try {
FileInputStream inStream=new FileInputStream(files[i]);
byte[] buffer = new byte[10240];
int byteread;
while((byteread=inStream.read(buffer))!=-1)
fs.write(buffer,0,byteread);
inStream.close();
}
catch(Exception e){
//復制文件出錯
e.printStackTrace();
}
}
}
try {
fs.close();
}
catch(IOException e){
e.printStackTrace();
}


35.寫入ini文件屬性
/
import java.io.;
import java.util.;
import java.util.regex.;
private static HashMap configMap=null;
*/
if (readIni()) {
ArrayList<Properties> li = null;
try {
FileWriter fw = new FileWriter(%%1);
li = (ArrayList<Properties>) configMap.get(%%2); //"[DataSource]"
fw.write("%%2\r\n");
for (Properties pro : li) {
if (pro.containsKey(%%3)) //"ip"
fw.write("%%3=" + %%6 + "\r\n");
}
fw.flush();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}


36.獲得當前路徑
String %%1=getClass().getResource("/").getPath();
//String %%1=System.getProperty("user.dir");


37.讀取XML數據庫
/
import java.io.;
import javax.xml.parsers.;
import org.w3c.dom.;
private static Document document;
private static Element node;
*/
File xml_file = new File(%%1);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.parse(xml_file);
} catch (Exception e) {
e.printStackTrace();
}
String subNodeTag = %%2;
Element rootNode = document.getDocumentElement();
//%%2="Product" //%%4="id" //%%6="port"
//%%3="Name" //%%5="001"
NodeList nlist = rootNode.getElementsByTagName(subNodeTag);
int len = nlist.getLength();
for (int i = 0; i < len; i++) {
node = nlist.item(i);
String getNodeAttrValue = null;
NamedNodeMap attrList = node.getAttributes();
for (int j = 0; j < attrList.getLength(); j++) {
if (attrList.item(j).getNodeName().equals(%%4)) {
getNodeAttrValue = attrList.item(j).getNodeValue();
break;
}
}
if (getNodeAttrValue.equals(%%5)) {
nlist = node.getChildNodes();
String %%9=((Element) node).getElementsByTagName(%%3).item(0)
.getFirstChild().getNodeValue();
break;
}
}


38.寫入XML數據庫
/
import java.io.;
import javax.xml.parsers.;
import org.w3c.dom.;
import javax.xml.transform.;
import javax.xml.transform.dom.;
import javax.xml.transform.stream.;
private Document document;
private Element node;/
File xml_file = new File(%%1);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.parse(xml_file);
} catch (Exception e) {
e.printStackTrace();
}
String subNodeTag = %%2;
Element rootNode = document.getDocumentElement();
// %%2="Product" //%%4="pid" //%%6="author"
// %%3="Name" //%%5="price"
NodeList nlist = rootNode.getElementsByTagName(subNodeTag);
String ss = null;
int len = nlist.getLength();
for (int i = 0; i < len; i++) {
node = (Element) nlist.item(i);
//node.setAttribute(%%4, "0"+String.valueOf(i)); //ID格式化
String getNodeAttrValue = null;
NamedNodeMap attrList = node.getAttributes();
for (int j = 0; j < attrList.getLength(); j++) {
if (attrList.item(j).getNodeName().equals(%%4)) {
getNodeAttrValue = attrList.item(j).getNodeValue();
break;
}
}
if (getNodeAttrValue.equals("001")) {
nlist = node.getChildNodes();
ss = ((Element) node).getElementsByTagName(%%3).item(0)
.getFirstChild().getNodeValue();
ss = ((Element) node).getElementsByTagName(%%6).item(0)
.getFirstChild().getNodeValue();
ss = ((Element) node).getElementsByTagName(%%5).item(0)
.getFirstChild().getNodeValue();
((Element) node).getElementsByTagName(%%3).item(0)
.getFirstChild().setTextContent(%%7);
((Element) node).getElementsByTagName(%%6).item(0)
.getFirstChild().setTextContent(%%8);
((Element) node).getElementsByTagName(%%5).item(0)
.getFirstChild().setTextContent(%%9);
break;
}
}
if (ss == null) {
node = document.createElement(%%2);
node.setAttribute(%%4, String.valueOf(nlist.getLength() + 1));
node.appendChild(document.createTextNode("\n"));
Element server = document.createElement(%%3);
server.appendChild(document.createTextNode(%%7));
node.appendChild(server);
Element ipNode = document.createElement(%%6);
ipNode.appendChild(document.createTextNode(%%8));
node.appendChild(ipNode);
node.appendChild(document.createTextNode("\n"));
Element port = document.createElement(%%5);
port.appendChild(document.createTextNode(%%9));
node.appendChild(port);
node.appendChild(document.createTextNode("\n"));
rootNode.appendChild(node);
}
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = null;
try {
transformer = tFactory.newTransformer();
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(xml_file);
transformer.transform(source, result);
} catch (IOException e) {
e.printStackTrace();
}


39.ZIP壓縮文件
/
import java.io.;
import java.util.zip.;/
//創建文件輸入流對象
FileInputStream fis=new FileInputStream(%%1);
//創建文件輸出流對象
FileOutputStream fos=new FileOutputStream(%%2);
//創建ZIP數據輸出流對象
ZipOutputStream zipOut=new ZipOutputStream(fos);
//創建指向壓縮原始文件的入口
ZipEntry entry=new ZipEntry(args[0]);
try {
zipOut.putNextEntry(entry);
//向壓縮文件中輸出數據
int nNumber;
byte[] buffer=new byte[1024];
while((nNumber=fis.read(buffer))!=-1)
zipOut.write(buffer,0,nNumber);
//關閉創建的流對象
zipOut.close();
fos.close();
fis.close();
}
catch(IOException e)
{
e.printStackTrace();
}


40.ZIP解壓縮
/
import java.io.;
import java.util.zip.;/
//創建文件輸入流對象實例
FileInputStream fis=new FileInputStream(%%1);
//創建ZIP壓縮格式輸入流對象實例
ZipInputStream zipin=new ZipInputStream(fis);
//創建文件輸出流對象實例
FileOutputStream fos=new FileOutputStream(%%2);
//獲取Entry對象實例
ZipEntry entry=zipin.getNextEntry();
byte[] buffer=new byte[1024];
int nNumber;
try{
while((nNumber=zipin.read(buffer,0,buffer.length))!=-1)
fos.write(buffer,0,nNumber);
//關閉文件流對象
zipin.close();
fos.close();
fis.close();
}
catch(IOException e) {
e.printStackTrace();
}


41.獲得應用程序完整路徑
String %%1=System.getProperty("user.dir");


42.遞歸刪除目錄中的文件
/
import java.io.;
import java.util.;/
ArrayList<String> folderList = new ArrayList<String>();
folderList.add(%%1);
for (int j = 0; j < folderList.size(); j++) {
File file = new File(folderList.get(j));
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
f.delete();
}
}


43.ZIP壓縮文件夾
/
import java.io.;
import java.util.;
import java.util.zip.;
*/
public static String zipFileProcess(ArrayList outputZipFileNameList, String outputZipNameAndPath) {
ArrayList fileNames = new ArrayList();
ArrayList files = new ArrayList();
FileOutputStream fileOut = null;
ZipOutputStream outputStream = null;
FileInputStream fileIn = null;
StringBuffer sb = new StringBuffer(outputZipNameAndPath);
// FileInputStream fileIn =null;
try {
if (outputZipNameAndPath.indexOf(".zip") != -1) {
outputZipNameAndPath = outputZipNameAndPath;
} else {
sb.append(".zip");
outputZipNameAndPath = sb.toString();
}
fileOut = new FileOutputStream(outputZipNameAndPath);
outputStream = new ZipOutputStream(fileOut);
int outputZipFileNameListSize = 0;
if (outputZipFileNameList != null) {
outputZipFileNameListSize = outputZipFileNameList.size();
}
for (int i = 0; i < outputZipFileNameListSize; i++) {
File rootFile = new File(outputZipFileNameList.get(i).toString());
listFile(rootFile, fileNames, files, "");
}
for (int loop = 0; loop < files.size(); loop++) {
fileIn = new FileInputStream((File) files.get(loop));
outputStream.putNextEntry(new ZipEntry((String) fileNames.get(loop)));
byte[] buffer = new byte[1024];
while (fileIn.read(buffer) != -1) {
outputStream.write(buffer);
}
outputStream.closeEntry();
fileIn.close();
}
return outputZipNameAndPath;
} catch (IOException ioe) {
return null;
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
}
}
if (fileIn != null) {
try {
fileIn.close();
} catch (IOException e) {
}
}
}
}
private static void listFile(File parentFile, List nameList, List fileList, String directoryName) {
if (parentFile.isDirectory()) {
File[] files = parentFile.listFiles();
for (int loop = 0; loop < files.length; loop++) {
listFile(files[loop], nameList, fileList, directoryName + parentFile.getName() + "/");
}
} else {
fileList.add(parentFile);
nameList.add(directoryName + parentFile.getName());
}
}
String savePath=%%1;
ArrayList<String> outputZipFileName=new ArrayList<String>();
outputZipFileName.add(%%2);
zipFileProcess(outputZipFileName,savePath);


44.IDEA加密算法
private byte[] bytekey;
public byte[] getKey(String key){
int len1 =key.length();
if (len1>=16) {
key=key.substring(0, 16);
} else {
for (int i=0;i<16-len1;i++){
key=key.concat("0");
}
}
bytekey=key.getBytes();
return bytekey;
}
/**


    

  • 加密String明文輸入,String密文輸出
    • 

  • @param strMing
    • 

  • @return
*/
public String getEncString(String strMing) {
byte[] byteMi = null;
byte[] byteMing = null;
String strMi = "";
try {
return byte2hex(IdeaEncrypt(bytekey,strMing.getBytes(),true) );
}
catch(Exception e){
e.printStackTrace();
}
finally {
byteMing = null;
byteMi = null;
}
return strMi;
}
/**
    • 

  • 解密 以String密文輸入,String明文輸出
    • 

  • @param strMi
    • 

  • @return
*/
public String getDesString(String strMi) {
byte[] byteMing = null;
byte[] byteMi = null;
String strMing = "";
try {
String tmp= new String(IdeaEncrypt(bytekey,hex2byte(strMi.getBytes()),false ));
int len1=tmp.length();
return tmp.substring(0, len1-6);
}
catch(Exception e) {
e.printStackTrace();
}
finally {
byteMing = null;
byteMi = null;
}
return strMing;
}
private byte[] Encrypt(byte[] bytekey, byte[] inputBytes, boolean flag) {
byte[] encryptCode = new byte[8];
// 分解子密鑰
int[] key = get_subkey(flag, bytekey);
// 進行加密操作
encrypt(key, inputBytes, encryptCode);
// 返回加密數據
return encryptCode;
}
    • 



private int bytesToInt(byte[] inBytes, int startPos) {
return ((inBytes[startPos] << 8) & 0xff00) +
(inBytes[startPos + 1] & 0xff);
}


private void intToBytes(int inputInt, byte[] outBytes, int startPos) {
outBytes[startPos] = (byte) (inputInt >>> 8);
outBytes[startPos + 1] = (byte) inputInt;
}


private int x_multiply_y(int x, int y) {
if (x == 0) {
x = 0x10001 - y;
} else if (y == 0) {
x = 0x10001 - x;
} else {
int tmp = x * y;
y = tmp & 0xffff;
x = tmp >>> 16;
x = (y - x) + ((y < x) ? 1 : 0);
}


return x & 0xffff;
}


private void encrypt(int[] key, byte[] inbytes, byte[] outbytes) {
int k = 0;
int a = bytesToInt(inbytes, 0);
int b = bytesToInt(inbytes, 2);
int c = bytesToInt(inbytes, 4);
int d = bytesToInt(inbytes, 6);


for (int i = 0; i < 8; i++) {
a = x_multiply_y(a, key[k++]);
b += key[k++];
b &= 0xffff;
c += key[k++];
c &= 0xffff;
d = x_multiply_y(d, key[k++]);


int tmp1 = b;
int tmp2 = c;
c ^= a;
b ^= d;
c = x_multiply_y(c, key[k++]);
b += c;
b &= 0xffff;
b = x_multiply_y(b, key[k++]);
c += b;
c &= 0xffff;
a ^= b;
d ^= c;
b ^= tmp2;
c ^= tmp1;
}


intToBytes(x_multiply_y(a, key[k++]), outbytes, 0);
intToBytes(c + key[k++], outbytes, 2);
intToBytes(b + key[k++], outbytes, 4);
intToBytes(x_multiply_y(d, key[k]), outbytes, 6);
}


private int[] encrypt_subkey(byte[] byteKey) {
int[] key = new int[52];


if (byteKey.length < 16) {
byte[] tmpkey = new byte[16];
System.arraycopy(byteKey, 0, tmpkey,
tmpkey.length - byteKey.length, byteKey.length);
byteKey = tmpkey;
}


for (int i = 0; i < 8; i++) {
key[i] = bytesToInt(byteKey, i * 2);
}


for (int j = 8; j < 52; j++) {
if ((j & 0x7) < 6) {
key[j] = (((key[j - 7] & 0x7f) << 9) | (key[j - 6] >> 7)) &
0xffff;
} else if ((j & 0x7) == 6) {
key[j] = (((key[j - 7] & 0x7f) << 9) | (key[j - 14] >> 7)) &
0xffff;
} else {
key[j] = (((key[j - 15] & 0x7f) << 9) | (key[j - 14] >> 7)) &
0xffff;
}
}


return key;
}


private int fun_a(int a) {
if (a < 2) {
return a;
}


int b = 1;
int c = 0x10001 / a;


for (int i = 0x10001 % a; i != 1;) {
int d = a / i;
a %= i;
b = (b + (c * d)) & 0xffff;


if (a == 1) {
return b;
}
d = i / a;
i %= a;
c = (c + (b * d)) & 0xffff;
}


return (1 - c) & 0xffff;
}


private int fun_b(int b) {
return (0 - b) & 0xffff;
}


private int[] uncrypt_subkey(int[] key) {
int dec = 52;
int asc = 0;
int[] unkey = new int[52];
int aa = fun_a(key[asc++]);
int bb = fun_b(key[asc++]);
int cc = fun_b(key[asc++]);
int dd = fun_a(key[asc++]);
unkey[--dec] = dd;
unkey[--dec] = cc;
unkey[--dec] = bb;
unkey[--dec] = aa;


for (int k1 = 1; k1 < 8; k1++) {
aa = key[asc++];
bb = key[asc++];
unkey[--dec] = bb;
unkey[--dec] = aa;
aa = fun_a(key[asc++]);
bb = fun_b(key[asc++]);
cc = fun_b(key[asc++]);
dd = fun_a(key[asc++]);
unkey[--dec] = dd;
unkey[--dec] = bb;
unkey[--dec] = cc;
unkey[--dec] = aa;
}


aa = key[asc++];
bb = key[asc++];
unkey[--dec] = bb;
unkey[--dec] = aa;
aa = fun_a(key[asc++]);
bb = fun_b(key[asc++]);
cc = fun_b(key[asc++]);
dd = fun_a(key[asc]);
unkey[--dec] = dd;
unkey[--dec] = cc;
unkey[--dec] = bb;
unkey[--dec] = aa;


return unkey;
}


private int[] get_subkey(boolean flag, byte[] bytekey) {
if (flag) {
return encrypt_subkey(bytekey);
} else {
return uncrypt_subkey(encrypt_subkey(bytekey));
}
}


private byte[] ByteDataFormat(byte[] data, int unit) {
int len = data.length;
int padlen = unit - (len % unit);
int newlen = len + padlen;
byte[] newdata = new byte[newlen];
System.arraycopy(data, 0, newdata, 0, len);


for (int i = len; i < newlen; i++)
newdata[i] = (byte) padlen;


return newdata;
}


public byte[] IdeaEncrypt(byte[] idea_key, byte[] idea_data, boolean flag) {
byte[] format_key = ByteDataFormat(idea_key, 16);
byte[] format_data = ByteDataFormat(idea_data, 8);


int datalen = format_data.length;
int unitcount = datalen / 8;
byte[] result_data = new byte[datalen];


for (int i = 0; i < unitcount; i++) {
byte[] tmpkey = new byte[16];
byte[] tmpdata = new byte[8];
System.arraycopy(format_key, 0, tmpkey, 0, 16);
System.arraycopy(format_data, i * 8, tmpdata, 0, 8);


byte[] tmpresult = Encrypt(tmpkey, tmpdata, flag);
System.arraycopy(tmpresult, 0, result_data, i * 8, 8);
}


return result_data;
}


/**


    

  • 二行制轉字符串
    • 

  • @param b
    • 

  • @return
*/
public static String byte2hex(byte[] b) { //一個字節的數，
// 轉成16進制字符串
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
//整數轉成十六進制表示
stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length() == 1)
hs = hs + "0" + stmp;
else
hs = hs + stmp;
}
return hs.toUpperCase(); //轉成大寫
}
    • 



public static byte[] hex2byte(byte[] b) {
if((b.length%2)!=0)
throw new IllegalArgumentException("長度不是偶數");
byte[] b2 = new byte[b.length/2];
for (int n = 0; n < b.length; n+=2) {
String item = new String(b,n,2);
// 兩位一組，表示一個字節,把這樣表示的16進制字符串，還原成一個進制字節
b2[n/2] = (byte)Integer.parseInt(item,16);
}


return b2;
}


public static void main(String[] args) {


IDEA idea = new IDEA();


idea.getKey("aadd");//生成密匙


String strEnc = idea.getEncString("1234567890");//加密字符串,返回String的密文
System.out.println(strEnc);


String strDes = idea.getDesString(strEnc);//把String 類型的密文解密
System.out.println(strDes);


// String key = "0000000000000000";
// String data = "11111111馮";
// byte[] bytekey = key.getBytes();
// byte[] bytedata = data.getBytes();
//
// IDEA idea = new IDEA();
// byte[] encryptdata = idea.IdeaEncrypt(bytekey, bytedata, true);
// byte[] decryptdata = idea.IdeaEncrypt(bytekey, encryptdata, false);
//
// System.out.println("--------------------------------");
//
// for (int i = 0; i < bytedata.length; i++) {
// System.out.print(" " + bytedata[i] + " ");
// }
//
// System.out.println("");
//
// for (int i = 0; i < encryptdata.length; i++) {
// System.out.print(" " + encryptdata[i] + " ");
// }
//
// System.out.println("");
//
// for (int i = 0; i < decryptdata.length; i++) {
// System.out.print(" " + decryptdata[i] + " ");
// }


}


45.驗證Schema
/
import javax.xml.;
import javax.xml.transform.stream.;
import javax.xml.validation.;
import org.xml.sax.;/
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
StreamSource ss = new StreamSource(%%1); //"mySchema.xsd"
try {
Schema schema = factory.newSchema(ss);
} catch (SAXException e) {
e.printStackTrace();
}


46.Grep
/
import java.util.regex.;
import java.io.;/
throws Exception
Pattern pattern = Pattern.compile(%%1); // 第一個參數為需要匹配的字符串
Matcher matcher = pattern.matcher("");
String file = %%2;
BufferedReader br = null;
String line;
try {
br = new BufferedReader (new FileReader (file)); // 打開文件
} catch (IOException e) {
// 沒有打開文件，則產生異常
System.err.println ("Cannot read '" + file


    

  • "': " + e.getMessage());
}
while ((line = br.readLine()) != null) { // 讀入一行，直到文件結束
matcher.reset (line); // 匹配字符串
if (matcher.find()) { // 如果有匹配的字符串，則輸出
//line
}
}
br.close(); // 關閉文件
    • 



47.直接創建多級目錄
//import java.io.*;
File f=new File(%%1);
f.mkdirs();


48.批量重命名
//import java.io.*;
File target = new File("%%1");
String[] files = target.list();
File f = null;
String filename = null;
for (String file : files) {
f = new File(target, file);
filename = f.getName();
if (filename.substring(filename.lastIndexOf('.')).equalsIgnoreCase(
"%%2")) {
f.renameTo(new File(target.getAbsolutePath(), filename.replace(
"%%2", "%%3")));
// 這里可以反復使用replace替換,當然也可以使用正則表達式來替換了 ".txt" ".bat"
}
}


49.文本查找替換
//import java.nio.;
String s1=%%1;
String s2=%%2;
String s3=%%3;
int pos=%%4;
/變量i和j分別表示主串和模式串中當前字符串的位置，k表示匹配次數/
int i,j,k=0;
i = pos;
j = 0;
//將s1轉化成StringBuffer型進行操作
repStr = new StringBuffer(s1);
while(i<repStr.length()&&j<s2.length())
{
if(repStr.charAt(i) == s2.charAt(j))
{
++i; ++j;
if(j==s2.length())
{
/j=s2.length()表示字符串匹配成功，匹配次數加1，此外對主串進行字符串替換*/
k = k+1;
repStr.replace(i-j,i,s3);
//將j進行重新賦值開始新的比較
j = 0;
}
}
else {i = i-j+1; j = 0;}
}
return k;


50.文件關聯
//import java.io.*;
try {
Runtime.getRuntime().exec(%%1); //"assoc .txt =mynote" "assoc [.ext[=[filetype]]]"
} catch (IOException e) {
e.printStackTrace();
}


51.批量轉換編碼從GB2312到Unicode


52.設置JDK環境變量
@echo off
IF EXIST %1\bin\java.exe (
rem 如輸入正確的 Java2SDK 安裝目錄，開始設置環境變量
@setx JAVA_HOME %1
@setx path %path%;%JAVA_HOME%\bin
@setx classpath %classpath%;.
@setx classpath %classpath%;%JAVA_HOME%\lib\tools.jar
@setx classpath %classpath%;%JAVA_HOME%\lib\dt.jar
@setx classpath %classpath%;%JAVA_HOME%\jre\lib\rt.jar
@echo on
@echo Java 2 SDK 環境參數設置完畢，正常退出。
) ELSE (
IF "%1"=="" (
rem 如沒有提供安裝目錄，提示之后退出
@echo on
@echo 沒有提供 Java2SDK 的安裝目錄,不做任何設置，現在退出環境變量設置。
) ELSE (
rem 如果提供非空的安裝目錄但沒有bin\java.exe，則指定的目錄為錯誤的目錄
@echo on
@echo 非法的 Java2SDK 的安裝目錄,不做任何設置，現在退出環境變量設置。
)
)
//http://sourceforge.net/projects/jregistrykey/
//import ca.beq.util.win32.registry.;
//import java.util.;
1.打開鍵
RegistryKey r = new RegistryKey(RootKey.HKEY_LOCAL_MACHINE, "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders");
2.添加鍵
RegistryKey r = new RegistryKey(RootKey.HKEY_CURRENT_USER, "Software\BEQ Technologies");
r.create();
9.寫入字符串值
RegistryKey r = new RegistryKey(RootKey.HKEY_CURRENT_USER, "Software\BEQ Technologies");
RegistryValue v = new RegistryValue("myVal", ValueType.REG_SZ, "data");
r.setValue(v);
6.獲取DWORD值
RegistryKey r = new RegistryKey(RootKey.HKEY_CURRENT_USER, "Software\BEQ Technologies");
if(r.hasValue("myValue")) {
RegistryValue v = r.getValue("myValue");
v.setType(ValueType.REG_DWORD);
} // if


53.批量轉換編碼從Unicode到GB2312


54.刪除空文件夾
//import java.io.*;
File f=new File(%%1);
if (isFolerNull(f)) {
for (File file :f.listFiles()) {
if (file.list().length == 0)
file.delete();
}
}


55.GB2312文件轉UTF-8格式
//import java.io.;
public class CharsetConvertor {
public static void main(String[] args) {
String str = "This is a test for 中網!@#$。，？";
try {
File f = new File("D:/test.txt");
FileOutputStream fio = new FileOutputStream(f);
String s = gbToUtf8(str);
fio.write(s.getBytes("UTF-8"));
fio.close();
}
catch (Exception e) {
e.printStackTrace();
}
}


public static String gbToUtf8(String str) throws UnsupportedEncodingException {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < str.length(); i++) {
String s = str.substring(i, i + 1);
if (s.charAt(0) > 0x80) {
byte[] bytes = s.getBytes("Unicode");
String binaryStr = "";
for (int j = 2; j < bytes.length; j += 2) {
// the first byte
String hexStr = getHexString(bytes[j + 1]);
String binStr = getBinaryString(Integer.valueOf(hexStr, 16));
binaryStr += binStr;
// the second byte
hexStr = getHexString(bytes[j]);
binStr = getBinaryString(Integer.valueOf(hexStr, 16));
binaryStr += binStr;
}
// convert unicode to utf-8
String s1 = "1110" + binaryStr.substring(0, 4);
String s2 = "10" + binaryStr.substring(4, 10);
String s3 = "10" + binaryStr.substring(10, 16);
byte[] bs = new byte[3];
bs[0] = Integer.valueOf(s1, 2).byteValue();
bs[1] = Integer.valueOf(s2, 2).byteValue();
bs[2] = Integer.valueOf(s3, 2).byteValue();
String ss = new String(bs, "UTF-8");
sb.append(ss);
} else {
sb.append(s);
}
}
return sb.toString();
}


private static String getHexString(byte b) {
String hexStr = Integer.toHexString(b);
int m = hexStr.length();
if (m < 2) {
hexStr = "0" + hexStr;
} else {
hexStr = hexStr.substring(m - 2);
}
return hexStr;
}


private static String getBinaryString(int i) {
String binaryStr = Integer.toBinaryString(i);
int length = binaryStr.length();
for (int l = 0; l < 8 - length; l++) {
binaryStr = "0" + binaryStr;
}
return binaryStr;
}
}


56.UTF-8文件轉GB2312格式
private String utf8Togb2312(String str){
StringBuffer sb = new StringBuffer();
for(int i=0; i<str.length(); i++) {
char c = str.charAt(i);
switch (c) {
case '+':
sb.append(' ');
break;
case '%':
try {
sb.append((char)Integer.parseInt(
str.substring(i+1,i+3),16));
}
catch (NumberFormatException e) {
throw new IllegalArgumentException();
}
i += 2;
break;
default:
sb.append(c);
break;
}
}
// Undo conversion to external encoding
String result = sb.toString();
String res=null;
try{
byte[] inputBytes = result.getBytes("8859_1");
res= new String(inputBytes,"UTF-8");
}
catch(Exception e){}
return res;
}


57.獲取文件路徑的父路徑
String %%2=%%1.substring(0,%%1.lastIndexOf("\"));


58.Unicode文件轉UTF-8格式
try {
// Convert from Unicode to UTF-8
String string = "abc\u5639\u563b";
byte[] utf8 = string.getBytes("UTF-8");
// Convert from UTF-8 to Unicode
string = new String(utf8, "UTF-8");
} catch (UnsupportedEncodingException e) {
}
/**


    

  • unicode 轉換成 utf-8
    • 

  • @author fanhui
    • 

  • 2007-3-15
    • 

  • @param theString
    • 

  • @return
*/
public static String unicodeToUtf8(String theString) {
char aChar;
int len = theString.length();
StringBuffer outBuffer = new StringBuffer(len);
for (int x = 0; x < len;) {
aChar = theString.charAt(x++);
if (aChar == '\') {
aChar = theString.charAt(x++);
if (aChar == 'u') {
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++) {
aChar = theString.charAt(x++);
switch (aChar) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
value = (value << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException(
"Malformed \uxxxx encoding.");
}
}
outBuffer.append((char) value);
} else {
if (aChar == 't')
aChar = '\t';
else if (aChar == 'r')
aChar = '\r';
else if (aChar == 'n')
aChar = '\n';
else if (aChar == 'f')
aChar = '\f';
outBuffer.append(aChar);
}
} else
outBuffer.append(aChar);
}
return outBuffer.toString();
}
    • 



59.CRC循環冗余校驗
/
import java.nio.;
import java.util.zip.;/
try {
FileInputStream in = new FileInputStream(%%1);
FileChannel channel = in.getChannel();
CRC32 crc = new CRC32();
int length = (int)channel.size();
MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, length);
for(int i = 0;i<length;i++)
{
int c = buffer.get(i);
crc.update(c);
}
System.out.println("crc校驗和："+(Long.toHexString(crc.getValue())).toUpperCase());
} catch (Exception e) {
e.printStackTrace();
}


60.判斷是否為空文件
//import java.io.*;
FileReader fr=new FileReader(%%1);
if(fr.read()==1)
//空白文件


61.終止程序
Runtime.exec("taskkill /F /IM %%1.exe");


62.定時關機
import java.awt.;
import java.awt.event.;
import java.awt.geom.;
import java.util.;
import javax.swing.*;


public class ClockFrame extends JFrame {
private JComboBox hourBox, minuteBox, secondBox;


private int hour, minute, second, totalSeconds, currentSeconds;


private long argue;


private GregorianCalendar calendar;


private boolean change = true;


private static final int WIDTH = 200;


private static final int HEIGHT = 150;


public ClockFrame() {


setTitle("關機定時");
setSize(200, 150);


Container contentPanel = getContentPane();


JPanel timePanel = new JPanel();
timePanel.setLayout(new GridLayout(4, 2));


JLabel minuteLable = new JLabel("設置分鐘");
timePanel.add(minuteLable);
minuteBox = new JComboBox();
timePanel.add(minuteBox);
for (int i = 0; i < 60; i++) {
minuteBox.addItem(i);
}
minuteBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
minute = ((Integer) minuteBox.getSelectedItem()).intValue();
}
});


JLabel secondLable = new JLabel("設置秒鐘");
timePanel.add(secondLable);
secondBox = new JComboBox();
timePanel.add(secondBox);
for (int i = 0; i < 60; i++) {
secondBox.addItem(i);
}
secondBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
second = ((Integer) secondBox.getSelectedItem()).intValue();
}
});
contentPanel.add(timePanel, BorderLayout.CENTER);


JButton check = new JButton("確定");
contentPanel.add(check, BorderLayout.SOUTH);
check.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
JButton check=(JButton) evt.getSource();
if (check.getText().equals("確定")) {
calendar = new GregorianCalendar();
int currentSeconds = calendar.get(Calendar.HOUR_OF_DAY)


    

  • 3600 + calendar.get(Calendar.MINUTE) * 60
    • 

  • calendar.get(Calendar.SECOND);
totalSeconds = hour  3600 + minute  60 + second;
    • 



if (totalSeconds - currentSeconds >= 0) {
argue = (totalSeconds - currentSeconds) * 1000;
JOptionPane.showMessageDialog(ClockFrame.this,
"您設置的時間為 " + hour + ":" + minute + ":" + second


    

  • "\n程序將在后臺運行，并在此時自動關閉計算機！", "設置成功",
JOptionPane.INFORMATION_MESSAGE);
hideFrame();
}
try {
// Thread.sleep(argue);//這句沒用
Runtime.getRuntime().exec(
"shutdown.exe -s -c \"我要關機了噢！不好意思！\" -t "
    • 

  • totalSeconds);
check.setText("取消");
} catch (Exception e) {
e.printStackTrace();
}
}else{
try {
Runtime.getRuntime().exec("shutdown.exe -a");
check.setText("確定");
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
}
    • 



private void hideFrame() {
this.setVisible(false);
}


public static void main(String[] args) {
JFrame frame = new ClockFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
frame.show();
}
}


63.顯示進程列表
//import java.io.*;
BufferedReader br=null;
try {
Process proc=Runtime.getRuntime().exec("tasklist");
br=new BufferedReader(new InputStreamReader(proc.getInputStream()));
@SuppressWarnings("unused")
String line=null;
while((line=br.readLine())!=null){
//br.readLine()
}
} catch (IOException e) {
e.printStackTrace();
}finally{
if(br!=null){
try {
br.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}


64.遍歷文件夾列出文件大小


65.目錄下所有文件移動到整合操作
/
import java.io.;
import java.util.;
import javax.swing.;
*/
JFileChooser Jfc = new JFileChooser("請選擇源路徑"); // 建立選擇檔案對話方塊盒 Jfc
Jfc.showDialog(null, %%1);
if (!Jfc.getSelectedFile() != null) {
return;
}
String %%1 = Jfc.getSelectedFile().getParent();
Jfc = new JFileChooser("請選擇目標路徑"); // 建立選擇檔案對話方塊盒 Jfc
Jfc.showDialog(null, %%1);
if (!Jfc.getSelectedFile() != null) {
return;
}
String %%2 = Jfc.getSelectedFile().getParent();


66.對目標壓縮文件解壓縮到指定文件夾
/
import java.io.;
import java.util.zip.;/
String zipFileName=%%1;
String extPlace=%%2;
File myFolderPath = new File(extPlace);
try {
if (!myFolderPath.exists()) {
myFolderPath.mkdir();
}
} catch (Exception e) {
//新建目錄操作出錯
e.printStackTrace();
return;
}
try {
ZipInputStream in = new ZipInputStream(new FileInputStream(
zipFileName));
ZipEntry entry = null;
while ((entry = in.getNextEntry()) != null) {
String entryName = entry.getName();
File file = new File(extPlace , entryName);
if (entry.isDirectory()) {
file.mkdirs();
} else {
FileOutputStream os = new FileOutputStream(file);
// Transfer bytes from the ZIP file to the output
// file
byte[] buf = new byte[10240];
int len;
while ((len = in.read(buf)) > 0) {
os.write(buf, 0, len);
}
os.close();
in.closeEntry();
}
}
} catch (IOException e) {
e.printStackTrace();
}


67.創建目錄副本整合操作
/
import java.io.;
import java.util.;
import javax.swing.;
*/
JFileChooser Jfc = new JFileChooser("請選擇源路徑"); // 建立選擇檔案對話方塊盒 Jfc
Jfc.showDialog(null, %%1);
if (!Jfc.getSelectedFile() != null) {
return;
}
String %%1 = Jfc.getSelectedFile().getParent();
Jfc = new JFileChooser("請選擇目標路徑"); // 建立選擇檔案對話方塊盒 Jfc
Jfc.showDialog(null, %%1);
if (!Jfc.getSelectedFile() != null) {
return;
}
String %%2 = Jfc.getSelectedFile().getParent();


68.打開網頁
//import java.io.*;
try{
String command = "C:\Program Files\Internet Explorer\Iexplore.exe "+%%1;
Runtime.getRuntime().exec(command);
} catch (IOException ex) {
ex.printStackTrace();
}


69.刪除空文件夾整合操作
/
import java.io.;
import java.util.;
import javax.swing.;
*/


70.獲取磁盤所有分區，把結果放在數組drives中
String root; //root代表盤符路徑
for(i=0;i<20;i++) //0-20代表最大的盤符數
{
root.Format("%c:\",allfenqu[i]);
if(GetDriveType(root)==5)
allfenqu[i]='\0';
}


但我用這樣的代碼時結果卻無法去掉光驅盤符，allfenqu[]中還是會包含光驅盤符：
String root;
for(i=0;i<20;i++)
{
root=allfenqu[i]+":\";
if(GetDriveType(root)==5)
allfenqu[i]='\0';
}


71.激活一個程序或程序關聯的文件
//import java.io.*;
try {
Runtime.getRuntime().exec(%%1);
} catch (IOException e) {
e.printStackTrace();
}


72.MP3播放
//必須下載 jmf包
//import javax.media.bean.playerbean.MediaPlayer; //必須下載 jmf 媒體播放包
MediaPlayer player;
player = new MediaPlayer();
setLayout(new FlowLayout());
try{
player.setMediaLocation("file:/F:\音樂\mp3\黑白配.mp3");// <<file:/>>不能刪除 音頻文件路徑
} catch (Exception e) {
System.err.println("文件不存在");
}
player.start();
player.stop();


73.WAV播放
/
import javax.sound.sampled.;
import java.io.;/
private AudioFormat format;
private byte[] samples;
private String filename;
try {
// open the audio input stream
AudioInputStream stream =AudioSystem.getAudioInputStream(new File(filename));
format = stream.getFormat();
// get the audio samples
samples = getSamples(stream);
}
catch (UnsupportedAudioFileException ex) {
ex.printStackTrace();
}
catch (IOException ex) {
ex.printStackTrace();
}


private byte[] getSamples(AudioInputStream audioStream) {
// get the number of bytes to read
int length = (int)(audioStream.getFrameLength() * format.getFrameSize());


// read the entire stream
byte[] samples = new byte[length];
DataInputStream is = new DataInputStream(audioStream);
try {
is.readFully(samples);
}
catch (IOException ex) {
ex.printStackTrace();
}


// return the samples
return samples;
}


public void play(InputStream source) {


// use a short, 100ms (1/10th sec) buffer for real-time
// change to the sound stream
int bufferSize = format.getFrameSize() *
Math.round(format.getSampleRate() / 10);
byte[] buffer = new byte[bufferSize];


// create a line to play to
SourceDataLine line;
try {
DataLine.Info info =
new DataLine.Info(SourceDataLine.class, format);
line = (SourceDataLine)AudioSystem.getLine(info);
line.open(format, bufferSize);
}
catch (LineUnavailableException ex) {
ex.printStackTrace();
return;
}


// start the line
line.start();


// copy data to the line
try {
int numBytesRead = 0;
while (numBytesRead != -1) {
numBytesRead =
source.read(buffer, 0, buffer.length);
if (numBytesRead != -1) {
line.write(buffer, 0, numBytesRead);
}
}
}
catch (IOException ex) {
ex.printStackTrace();
}


// wait until all data is played, then close the line
line.drain();
line.close();
}


throws Exception
String filename=%%1;
InputStream stream =new ByteArrayInputStream(sound.getSamples());
// play the sound
sound.play(stream);


74.寫圖像到剪切板
/
import java.awt.;
import java.awt.datatransfer.;
import java.io.;
private final Image image;
*/
Transferable trans = new Transferable() {
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { DataFlavor.imageFlavor };
}


public boolean isDataFlavorSupported(DataFlavor flavor) {
return DataFlavor.imageFlavor.equals(flavor);
}


public Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException, IOException {
if (isDataFlavorSupported(flavor))
return image;
throw new UnsupportedFlavorException(flavor);
}
};
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans,
null);


75.從剪貼板復制圖像到窗體


76.刪除文件夾下的所有文件且不刪除文件夾下的文件夾
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
f.delete();
}
}


78.Unicode文件轉GB2312格式
private static boolean isNeedConvert(char para){
return ((para&(0x00FF))!=para);
}
String dataStr=%%1;"\u9009 \u5173";
int index = 0;
StringBuffer buffer = new StringBuffer();
while(index<dataStr.length()) {
if(!"\u".equals(dataStr.substring(index,index+2))){
buffer.append(dataStr.charAt(index));
index++;
continue;
}
String charStr = "";
charStr = dataStr.substring(index+2,index+6);
char letter = (char) Integer.parseInt(charStr, 16 );
buffer.append(letter);
index+=6;
}
String %%2=buffer.toString();


79.開源程序庫Xercesc-C++代碼工程中內聯
import java.io.;
import java.util.;
import java.util.regex.*;
public class InlineXercesc {
private final String filter = ".cpp";


private ArrayList<String> all = new ArrayList<String>();


private LinkedList<String> fal2 = new LinkedList<String>();


private static String CurDir = System.getProperty("user.dir");


private void doSearch(String path) {
File filepath = new File(path);
if (filepath.exists() && filepath.isDirectory()) {
File[] fileArray = filepath.listFiles();
for (File f : fileArray) {
if (f.isDirectory()) {
doSearch(f.getPath());
} else {
if (f.getName().indexOf(filter) >= 0) {
for (String file : all) {
if (file.substring(file.lastIndexOf("\") + 1)
.equals(f.getName())) {
fal2.add(f.getAbsolutePath());
}
}
}
}
}
}
}


public InlineXercesc(String lib) throws IOException {
String SourceLib = "D:\Desktop\大項目\xerces-c-3.0.1\src";
Pattern pattern = Pattern.compile("include.?" + lib + ".?>"); // 第一個參數為需要匹配的字符串
Matcher matcher = pattern.matcher("");
LinkedList<String> fal = new LinkedList<String>();
File delfile = new File(CurDir);
File[] files2 = delfile.listFiles();
for (int l = 0; l < files2.length; l++) {
if (files2[l].isDirectory()) {
String enumDir = CurDir + "\" + files2[l].getName() + "\";
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(files2[l].getAbsolutePath());
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
String fileStr = files[i].getAbsolutePath(); // 第2個參數開始，均為文件名。
BufferedReader br = null;
String line;
try {
br = new BufferedReader(new FileReader(fileStr)); // 打開文件
} catch (IOException e) {
// 沒有打開文件，則產生異常
System.err.println("Cannot read '" + fileStr


    

  • "': " + e.getMessage());
continue;
}
StringBuilder sb = new StringBuilder(2048);
while ((line = br.readLine()) != null) { // 讀入一行，直到文件結束
matcher.reset(line); // 匹配字符串
if (matcher.find()) { // 如果有匹配的字符串，則輸出
sb.append(line.replace(
line.substring(line.indexOf("<"),
line.lastIndexOf("/") + 1),
"\"").replace('>', '\"'));
line = line.substring(
line.indexOf("<") + 1,
line.lastIndexOf(">")).replace('/',
'\');
fal.add(SourceLib + "\" + line);
} else {
sb.append(line);
}
sb.append("\r\n");
}
br.close(); // 關閉文件
FileWriter fw2 = new FileWriter(fileStr);
fw2.write(sb.toString());
fw2.flush();
fw2.close();
}
}
}
while (fal.size() > 0) {
String file = fal.poll(); // 第2個參數開始，均為文件名。
String targetPath = enumDir
    • 

  • file.substring(file.lastIndexOf("\") + 1);
if (!new File(targetPath).exists()) {
BufferedReader br = null;
String line;
try {
br = new BufferedReader(new FileReader(file)); // 打開文件
} catch (IOException e) {
// 沒有打開文件，則產生異常
System.err.println("Cannot read '" + file + "': "
    • 

  • e.getMessage());
continue;
}
FileWriter fw = new FileWriter(targetPath);
while ((line = br.readLine()) != null) { // 讀入一行，直到文件結束
matcher.reset(line); // 匹配字符串
if (matcher.find()) { // 如果有匹配的字符串，則輸出
fal.add(SourceLib
    • 

  • "\"
    • 

  • line.substring(line.indexOf("<") + 1,
line.lastIndexOf(">")).replace(
'/', '\'));
line = line.replace(line.substring(line
.indexOf("<"),
line.lastIndexOf("/") + 1), "\"");
line = line.replace(">", "\"");
    • 



}
fw.write(line + "\r\n");
}
fw.flush();
fw.close();
br.close(); // 關閉文件


}
}
LinkedList<String> folderListArr = new LinkedList<String>();
folderListArr.add(CurDir);
while (folderListArr.size() > 0) {
File file = new File(folderListArr.poll());
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderListArr.add(files[i].getPath());
} else {
if (files[i].getName().substring(
files[i].getName().lastIndexOf('.'))
.equals(".hpp"))
all.add(files[i].getAbsoluteFile().toString()
.replace(".hpp", ".cpp"));
}
}
}
int count = 1;
while (count > 0) {
doSearch(SourceLib);
all.clear();
while (fal2.size() > 0) {
String file1 = fal2.poll(); // 第2個參數開始，均為文件名。
String targetPath = enumDir


    

  • file1.substring(file1.lastIndexOf("\") + 1);
if (!new File(targetPath).exists()) {
BufferedReader br = null;
String line;
try {
br = new BufferedReader(new FileReader(file1)); // 打開文件
} catch (IOException e) {
// 沒有打開文件，則產生異常
System.err.println("Cannot read '" + file1
    • 

  • "': " + e.getMessage());
continue;
}
FileWriter fw;
try {
fw = new FileWriter(targetPath);
while ((line = br.readLine()) != null) { // 讀入一行，直到文件結束
matcher.reset(line); // 匹配字符串
if (matcher.find()) { // 如果有匹配的字符串，則輸出
fal2.add(SourceLib
    • 

  • "\"
    • 

  • line.substring(
line.indexOf('<') + 1,
line.lastIndexOf('>'))
.replace('/', '\'));
all.add(fal2.getLast().replace(".hpp",
".cpp"));
line = line.replace(line.substring(line
.indexOf('<'), line
.lastIndexOf('/') + 1), "\"");
line = line.replace('>', '\"');
}
fw.write(line + "\r\n");
}
fw.flush();
fw.close();
br.close(); // 關閉文件
} catch (IOException e) {
e.printStackTrace();
}
}
}
count = all.size();
}
}
}
}
    • 



public static void main(String[] args) {
try {
new InlineXercesc("xercesc");
// 將數據寫入文件
try {
FileWriter fw = new FileWriter(CurDir + "\DetailCpp.cmd");
fw.write("copy StdAfx.cpp+.c+.cpp " + CurDir


    

  • "\StdAfx.cpp && del .c && del .cpp");
fw.flush();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (IOException e) {
}
}
}
    • 



80.提取包含頭文件列表
import java.io.;
import java.util.regex.;
import java.util.;
public class InlineExt {
private String CurDir = System.getProperty("user.dir");
public InlineExt() {
Pattern pattern = Pattern.compile("include.?\".*?.hpp\""); // 第一個參數為需要匹配的字符串
Matcher matcher = pattern.matcher("");
File delfile = new File(CurDir);
File[] files2 = delfile.listFiles();
for (int l = 0; l < files2.length; l++) {
if (files2[l].isDirectory()) {
Set<String> ts = new LinkedHashSet<String>();
File file = new File(files2[l].getPath(), "StdAfx.cpp");
BufferedReader br = null;
FileWriter fw = null;
String line;
try {
br = new BufferedReader(new FileReader(file)); // 打開文件
while ((line = br.readLine()) != null) {
matcher.reset(line); // 匹配字符串
if (matcher.find()) { // 如果有匹配的字符串，則輸出
ts.add(line.substring(line.indexOf('\"') + 1, line
.lastIndexOf('\"')));
}
}
Iterator<String> it = ts.iterator();
File file2 = new File(files2[l], "ReadMe.txt");
if (file2.exists()) {
fw = new FileWriter(file2);
while (it.hasNext()) {
fw.write("#include \"" + it.next() + "\"\r\n");
}
}
} catch (IOException e) {
// 沒有打開文件，則產生異常
System.err.println("Cannot read '" + file + "': "


    

  • e.getMessage());
continue;
} finally {
try {
if (br != null)
br.close();
if (fw != null)
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
public static void main(String[] args) {
new InlineExt();
}
}
    • 



81.GB2312文件轉Unicode格式


82.Java程序打包
/
import java.io.;
import java.util.;
private static String className;
private static File myFilePath;/
String path=%%1;
ProcessBuilder pb = null;
myFilePath = new File(path, "conf.txt");
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(path);
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
if (files[i].getName().substring(2).contains(".")
&& files[i].getName().substring(
files[i].getName().lastIndexOf('.'))
.equals(".java")) {


try {
className = files[i].getName().substring(0,
files[i].getName().lastIndexOf('.'));
if (!myFilePath.exists())
myFilePath.createNewFile();
FileWriter resultFile = new FileWriter(myFilePath);
PrintWriter myFile = new PrintWriter(resultFile);
myFile.println("Main-Class:" + className);
myFile.flush();
myFile.close();
resultFile.close();
pb = new ProcessBuilder("javac", files[i]
.getAbsolutePath()


    

  • " && jar cmf "
    • 

  • myFilePath.getAbsolutePath()
    • 

  • " "
    • 

  • className
    • 

  • ".jar "
    • 

  • className
    • 

  • ".class");
pb.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
folderList = new LinkedList<String>();
folderList.add(path);
while (folderList.size() > 0) {
File file = new File((String)folderList.poll());
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
if (files[i].getName().substring(2).contains(".")
&& files[i].getName().substring(
files[i].getName().lastIndexOf('.'))
.equals(".class")) {
files[i].delete();
}
}
}
}
    • 



83.UTF-8文件轉Unicode格式
/**


    

  • utf-8 轉換成 unicode
    • 

  • @author fanhui
    • 

  • 2007-3-15
    • 

  • @param inStr
    • 

  • @return
*/
public static String utf8ToUnicode(String inStr) {
char[] myBuffer = inStr.toCharArray();
    • 



StringBuffer sb = new StringBuffer();
for (int i = 0; i < inStr.length(); i++) {
UnicodeBlock ub = UnicodeBlock.of(myBuffer[i]);
if(ub == UnicodeBlock.BASIC_LATIN){
//英文及數字等
sb.append(myBuffer[i]);
}else if(ub == UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS){
//全角半角字符
int j = (int) myBuffer[i] - 65248;
sb.append((char)j);
}else{
//漢字
short s = (short) myBuffer[i];
String hexS = Integer.toHexString(s);
String unicode = "\u"+hexS;
sb.append(unicode.toLowerCase());
}
}
return sb.toString();
}


84.創建PDF文檔
/
http://www.lowagie.com/iText/
http://jaist.dl.sourceforge.net/sourceforge/itext/itext-1.4.jar
http://itextdocs.lowagie.com/downloads/iTextAsian.jar
http://itextdocs.lowagie.com/downloads/iTextAsianCmaps.jar
import java.io.;
import com.lowagie.text.;
import com.lowagie.text.pdf.PdfWriter;/
Document document = new Document();
try
{
PdfWriter.getInstance(document, new FileOutputStream(%%1)); //"HelloWorld.pdf"
// 添加PDF文檔的一些信息
document.addTitle("Hello World example");
document.addAuthor("Bruno Lowagie");
document.addSubject("This example explains how to add metadata.");
document.addKeywords("iText, Hello World, step 3, metadata");
document.addCreator("My program using iText");
document.open();
// 插入一個段落
document.add(new Paragraph("Hello World!"));


}
catch (DocumentException de)
{
System.err.println(de.getMessage());
}
catch (IOException ioe)
{
System.err.println(ioe.getMessage());
}


// 關閉打開的文檔
document.close();


三、中文問題：


由于iText不支持東亞語言，我們下載了iTextAsian.jar 以后，就可以在PDF里面寫中文：


/**


    

  • AsianTest.java
/
import java.io.;
import com.lowagie.text.;
import com.lowagie.text.pdf.;
import java.awt.*;
    • 



public class AsianTest{


public static void main(String[] args) {


// 創建一個Document對象
Document document = new Document();


try
{


// 生成名為 AsianTest.pdf 的文檔
PdfWriter.getInstance(document, new FileOutputStream("AsianTest.pdf"));


/** 新建一個字體,iText的方法


    

  • STSongStd-Light 是字體，在iTextAsian.jar 中以property為后綴
    • 

  • UniGB-UCS2-H 是編碼，在iTextAsian.jar 中以cmap為后綴
    • 

  • H 代表文字版式是 橫版， 相應的 V 代表 豎版
*/
BaseFont bfChinese = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", false);
    • 



Font fontChinese = new Font(bfChinese, 12, Font.NORMAL, Color.GREEN);


// 打開文檔，將要寫入內容
document.open();


// 插入一個段落
Paragraph par = new Paragraph("我們",fontChinese);


document.add(par);


}
catch (DocumentException de)
{
System.err.println(de.getMessage());
}
catch (IOException ioe)
{
System.err.println(ioe.getMessage());
}


// 關閉打開的文檔
document.close();
}
}


就可以顯示中文了。


四、其他問題：（應導入相應的包）


    

  1. 換頁：
    2. 



document.newPage();


    

  1. 表格：
    2. 



// 設置 Table
Table aTable = new Table(3);
int width[] = {25,25,50};
aTable.setWidths(width);
aTable.setWidth(80); // 占頁面寬度 80%


aTable.setDefaultHorizontalAlignment(Element.ALIGN_LEFT);
aTable.setDefaultVerticalAlignment(Element.ALIGN_MIDDLE);
aTable.setAutoFillEmptyCells(true); //自動填滿
aTable.setPadding(1);
aTable.setSpacing(1);
aTable.setDefaultCellBorder(0);
aTable.setBorder(0);


Cell cell = new Cell(new Phrase("這是一個測試的 3*3 Table 數據", fontChinese ));
cell.setVerticalAlignment(Element.ALIGN_TOP);
cell.setRowspan(3);
aTable.addCell(cell);


aTable.addCell(new Cell("#1"));
aTable.addCell(new Cell("#2"));
aTable.addCell(new Cell("#3"));


aTable.addCell(new Cell("#4"));
aTable.addCell(new Cell("#5"));
aTable.addCell(new Cell("#6"));


document.add(aTable);


    

  1. 圖片：
    2. 



// 可以是絕對路徑，也可以是URL
Image img = Image.getInstance("logo.gif");


// Image image = Image.getInstance(new URL(http://xxx.com/logo.jpg));


img.setAbsolutePosition(0, 0);


document.add(img);


五、參考文檔：


iText
http://www.lowagie.com/iText/


iText API:
http://itext.sourceforge.net/docs/


http://www.sentom.net/list.asp?id=42


85.創建Word文檔
/
import java.awt.;
import java.io.;
import com.lowagie.text.;
import com.lowagie.text.pdf.;
import com.lowagie.text.rtf.;
*/
public void createDocContext(String file) throws DocumentException,
IOException {
// 設置紙張大小
Document document = new Document(PageSize.A4);
// 建立一個書寫器(Writer)與document對象關聯，通過書寫器(Writer)可以將文檔寫入到磁盤中
RtfWriter2.getInstance(document, new FileOutputStream(file));
document.open();
// 設置中文字體
BaseFont bfChinese = BaseFont.createFont("STSongStd-Light",
"UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
// 標題字體風格
Font titleFont = new Font(bfChinese, 12, Font.BOLD);
// 正文字體風格
Font contextFont = new Font(bfChinese, 10, Font.NORMAL);
Paragraph title = new Paragraph("標題");
// 設置標題格式對齊方式
title.setAlignment(Element.ALIGN_CENTER);
title.setFont(titleFont);
document.add(title);


String contextString = "iText是一個能夠快速產生PDF文件的java類庫。"


    

  • " \n"// 換行
    • 

  • "iText的java類對于那些要產生包含文本，"
    • 

  • "表格，圖形的只讀文檔是很有用的。它的類庫尤其與java Servlet有很好的給合。"
    • 

  • "使用iText與PDF能夠使你正確的控制Servlet的輸出。";
Paragraph context = new Paragraph(contextString);
// 正文格式左對齊
context.setAlignment(Element.ALIGN_LEFT);
context.setFont(contextFont);
// 離上一段落（標題）空的行數
context.setSpacingBefore(5);
// 設置第一行空的列數
context.setFirstLineIndent(20);
document.add(context);
    • 



//利用類FontFactory結合Font和Color可以設置各種各樣字體樣式
/**


    

  • Font.UNDERLINE 下劃線，Font.BOLD 粗體
*/
Paragraph underline = new Paragraph("下劃線的實現", FontFactory.getFont(
FontFactory.HELVETICA_BOLDOBLIQUE, 18, Font.UNDERLINE,
new Color(0, 0, 255)));
document.add(underline);
    • 



// 設置 Table 表格
Table aTable = new Table(3);
int width[] = {25,25,50};
aTable.setWidths(width);//設置每列所占比例
aTable.setWidth(90); // 占頁面寬度 90%


aTable.setAlignment(Element.ALIGN_CENTER);//居中顯示
aTable.setAlignment(Element.ALIGN_MIDDLE);//縱向居中顯示
aTable.setAutoFillEmptyCells(true); //自動填滿
aTable.setBorderWidth(1); //邊框寬度
aTable.setBorderColor(new Color(0, 125, 255)); //邊框顏色
aTable.setPadding(2);//襯距，看效果就知道什么意思了
aTable.setSpacing(3);//即單元格之間的間距
aTable.setBorder(2);//邊框


//設置表頭
/**


    

  • cell.setHeader(true);是將該單元格作為表頭信息顯示；
    • 

  • cell.setColspan(3);指定了該單元格占3列；
    • 

  • 為表格添加表頭信息時，要注意的是一旦表頭信息添加完了之后，
    • 

  • 必須調用 endHeaders()方法，否則當表格跨頁后，表頭信息不會再顯示
*/
Cell haderCell = new Cell("表格表頭");
haderCell.setHeader(true);
haderCell.setColspan(3);
aTable.addCell(haderCell);
aTable.endHeaders();
    • 



Font fontChinese = new Font(bfChinese, 12, Font.NORMAL, Color.GREEN);
Cell cell = new Cell(new Phrase("這是一個測試的 3*3 Table 數據", fontChinese ));
cell.setVerticalAlignment(Element.ALIGN_TOP);
cell.setBorderColor(new Color(255, 0, 0));
cell.setRowspan(2);
aTable.addCell(cell);


aTable.addCell(new Cell("#1"));
aTable.addCell(new Cell("#2"));
aTable.addCell(new Cell("#3"));
aTable.addCell(new Cell("#4"));
Cell cell3 = new Cell(new Phrase("一行三列數據", fontChinese ));
cell3.setColspan(3);
cell3.setVerticalAlignment(Element.ALIGN_CENTER);
aTable.addCell(cell3);


document.add(aTable);
document.add(new Paragraph("\n"));
//添加圖片
Image img=Image.getInstance("d:\img01800.jpg");
img.setAbsolutePosition(0, 0);
img.setAlignment(Image.RIGHT);//設置圖片顯示位置
img.scaleAbsolute(12,35);//直接設定顯示尺寸
img.scalePercent(50);//表示顯示的大小為原尺寸的50%
img.scalePercent(25, 12);//圖像高寬的顯示比例
img.setRotation(30);//圖像旋轉一定角度
document.add(img);


document.close();
}


/**


    

  • @param args
*/
public static void main(String[] args) {
CreateWordDemo word = new CreateWordDemo();
String file = "c:/demo1.doc";
try {
word.createDocContext(file);
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
    • 



/ 內部線程類 /
class Son extends Thread
{
private ICallBack event;
public Son(ICallBack callback)
{
event=callback;
}
public void run()
{
try
{
java.text.SimpleDateFormat fmt=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
while(true)
{
Thread.currentThread().sleep(3000);
event.output(fmt.format(new java.util.Date()));
Thread.currentThread().sleep(3000);
}
}
catch (Exception e)
{
}
}
}


/ 回調接口 /
interface ICallBack
{
public void output();
}


86.快速高效的文件加密
/
import java.util.;
import java.io.;
import javax.swing.;
*/
private static final String CharSet = "0123456789ABCDEF";
private static final int a[] = { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 };
private static final int b[] = { 3, 3, 3, 5, 5, 3, 3, 3, 5, 3, 5, 3, 7, 3,
11, 7, 11, 3, 5, 3, 3, 3, 7, 5, 5, 3, 7, 3, 11, 13, 3 };
private static final int c[] = { 3, 5, 7, 5, 7, 11, 13, 19, 17, 29, 19, 31,
17, 41, 11, 19, 13, 47, 29, 53, 59, 67, 29, 41, 43, 71, 31, 73, 23,
23, 101 };
private static final int d[] = { 5, 7, 11, 13, 17, 17, 19, 29, 43, 43, 47,
47, 59, 61, 61, 67, 71, 71, 73, 79, 89, 101, 101, 103, 107, 107,
109, 109, 127, 149, 151 };
private static int ka, kb, kc, kd;


private static void init() {
Date t1 = new Date();
Date t2 = new Date(79, 8, 23, 8, 30, 0); // "9-23-1979 8:30"
int GetDays = 0;
int result = 0;
Calendar start = new GregorianCalendar();
Calendar end = new GregorianCalendar();
start.setTime(t2);
end.setTime(t1);
Calendar startCalendar = start;
int startYear = start.get(Calendar.YEAR);
int startMonth = start.get(Calendar.MONTH);
int startDayOfM = start.get(Calendar.DAY_OF_MONTH);
int startDayOfY = start.get(Calendar.DAY_OF_YEAR);


Calendar endCalendar = end;
int endYear = end.get(Calendar.YEAR);
int endMonth = end.get(Calendar.MONTH);
int endDayOfM = end.get(Calendar.DAY_OF_MONTH);
int endDayOfY = end.get(Calendar.DAY_OF_YEAR);
int startLastYear = 0, startLastDayOfY = 0;
if (endYear == startYear) {
startLastYear = endDayOfY < startDayOfY ? startYear : endYear;
startLastDayOfY = endDayOfY < startDayOfY ? startDayOfY : endDayOfY;
} else if (endYear < startYear) {
startLastYear = startYear;
startLastDayOfY = startDayOfY;
} else {
startLastYear = endYear;
startLastDayOfY = endDayOfY;
}


if ((endYear == startYear && endDayOfY == startDayOfY)
|| (startLastYear == startYear && startLastDayOfY == startDayOfY)) {
GetDays = result;
} else if (startYear == endYear) {
GetDays = endDayOfY - startDayOfY;
} else {
Calendar tmp = Calendar.getInstance();
result = startCalendar.getActualMaximum(Calendar.DAY_OF_YEAR)


    

  • startDayOfY;
for (int i = startYear + 1; i < endYear; i++) {
tmp.set(i, tmp.get(Calendar.MONTH), tmp
.get(Calendar.DAY_OF_MONTH));
result += tmp.getActualMaximum(Calendar.DAY_OF_YEAR);
}
result += end.get(Calendar.DAY_OF_YEAR);
GetDays = result;
}
Random rand = new Random(GetDays * 8 - 55);
int r = rand.nextInt(GetDaysInMoths(t2.getMonth() + 1));
r=0;
ka = a[r];
kb = b[r];
kc = c[r];
kd = d[r];
}
    • 



private static int GetDaysInMoths(int nMoths) {
switch (nMoths) {
case 2: {
int nYear = new Date().getYear() + 1900;
if ((nYear % 4 == 0) && (nYear % 400) != 0) {
return 29;
} else {
return 28;
}
}
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
return 31;
case 4:
case 6:
case 9:
case 11:
return 30;
default:
return -1;
}
}


private static int niyuan(int m, int n) {
int a, b, c, d, t, yu = 0, shang, mod;
a = m;
b = n;
mod = a;
c = 0;
d = 1;
while (b < 0)
b += a;
if (a % b == 0 || b % 2 == 0)
return 0;
while (b != 1) {
t = a % b;
shang = a / b;
a = b;
b = t;
yu = c - shang * d;
c = d;
d = yu;
}
if (yu < 0)
yu += mod;
return yu;
}
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("E:"));
chooser
.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(".zip")
|| f.isDirectory();
}


public String getDescription() {
return "Compress Files(*.zip)";
}
});
chooser
.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(".txt")
|| f.isDirectory();
}


public String getDescription() {
return "Text Files(*.txt)";
}
});
chooser
.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(".exe")
|| f.isDirectory();
}


public String getDescription() {
return "Executeable Files(*.exe)";
}
});
if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getPath();
JFileChooser chooser2 = new JFileChooser();
chooser2.setCurrentDirectory(new File("E:"));
if (name.substring(name.lastIndexOf('.')).equals(".txt")) {
char[] sRead = new char[10240];
char[] hexstr = new char[10240];
char[] pbuf = new char[20480];
char[] rRead = new char[20480];
char[] out2 = new char[10240];
chooser2
.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(
".zip")
|| f.isDirectory();
}


public String getDescription() {
return "Compress Files(*.zip)";
}
});
chooser2
.addChoosableFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(
".exe")
|| f.isDirectory();
}


public String getDescription() {
return "Executeable Files(.exe)";
}
});
if (chooser2.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
init();
FileOutputStream fw = null;
try {
FileInputStream fis = new FileInputStream(chooser
.getSelectedFile());
fw = new FileOutputStream(chooser2.getSelectedFile());
byte[] buffer = new byte[20480];
int js = 0, tmp;
int aany, ddny;
int r00 = ka  kc  kd;
int r01 = -ka  kb  kc;
int r10 = -kb  kc  kc;
int r11 = ka  kb  kc;
int x00 = ka  ka  kc  kd - ka  kb  kc  kc;
int x11 = ka  kb  kc  kd - kb  kb  kc  kc;
while (x00 % 2 == 0) {
x00 /= 2;
r00 /= 2;
r01 /= 2;
}
while (x11 % 2 == 0) {
x11 /= 2;
r10 /= 2;
r11 /= 2;
}
aany = x00;
ddny = x11;
if (niyuan(1024, aany) != 0 && niyuan(1024, ddny) != 0) {
int kn00 = r00  niyuan(1024, x00);
int kn01 = r01  niyuan(1024, x00);
int kn10 = r10  niyuan(1024, x11);
int kn11 = r11  niyuan(1024, x11);
ka = kn00;
kb = kn01;
kc = kn10;
kd = kn11;
} else {
JOptionPane.showMessageDialog(null, "無逆矩陣！");
System.exit(0);
}
while (ka < 0)
ka += 1024;
while (kb < 0)
kb += 1024;
while (kc < 0)
kc += 1024;
while (kd < 0)
kd += 1024;
ka %= 1024;
kb %= 1024;
kc %= 1024;
kd %= 1024;
try {
int byteread;
while ((byteread = fis.read(buffer)) != -1) {
int nLen = byteread / 2;
byte[] sming = new byte[nLen];
String chs = new String(buffer, "US-ASCII");
for (int i = 0; i < nLen; i++) {
byte bTmp;
if (byteread < 2)
bTmp = -1;
bTmp = (byte) (CharSet.indexOf(chs
.substring(i  2, i  2 + 1))  16 + CharSet
.indexOf(chs.substring(i  2 + 1,
i  2 + 2)));
sming[i] = bTmp;
}
if (nLen % 2 != 0)
js = 1;
for (int i = 0; i < nLen - 1; i += 2) {
char c1 = (char) sming[i];
char c2 = (char) sming[i + 1];
tmp = ka  c1 + kc  c2;
while (tmp < 0)
tmp += 1024;
char s1 = (char) (tmp % 1024);
fw.write(s1);
tmp = kb  c1 + kd  c2;
while (tmp < 0)
tmp += 1024;
char s2 = (char) (tmp % 1024);
fw.write(s2);
}
if (js == 1) {
char c3 = (char) ((sming[nLen - 1] - 4) % 1024);
fw.write(c3);
}
}
fw.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fis.close();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
if(!chooser2.getFileFilter().accept(chooser2.getSelectedFile())){
if(chooser2.getFileFilter().getDescription().equals("Compress Files(.zip)"))
chooser2.getSelectedFile().renameTo(new File(chooser2.getSelectedFile().getAbsolutePath()+".zip"));
else if(chooser2.getFileFilter().getDescription().equals("Executeable Files(.exe)"))
chooser2.getSelectedFile().renameTo(new File(chooser2.getSelectedFile().getAbsolutePath()+".exe"));
}


}
} else {
chooser2
.setFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(
".txt")
|| f.isDirectory();
}


public String getDescription() {
return "Text Files";
}
});
if (chooser2.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {


if (chooser2.getSelectedFile() != null) {
init();
File oldfile = chooser.getSelectedFile();
FileInputStream inStream = null;
FileWriter fw = null;
try {
if (oldfile.exists()) {
inStream = new FileInputStream(oldfile);
fw = new FileWriter(chooser2.getSelectedFile());
byte[] sRead = new byte[10240];
int byteread;
while ((byteread = inStream.read(sRead)) != -1) {
StringBuilder smi = new StringBuilder(
byteread  2);
int js = 0;
if (byteread % 2 != 0)
js = 1;
for (int i = 0; i < byteread - 1; i += 2) {
char c1 = (char) sRead[i];
char c2 = (char) sRead[i + 1];
int tmp = ka  c1 + kc  c2;
while (tmp < 0)
tmp += 1024;
byte s1 = (byte) (tmp % 1024);
int js1 = (int) s1 >> 4 & 0xf;
smi.append(CharSet.substring(js1,
js1 + 1));
int ks1 = s1 & 0xf;
smi.append(CharSet.substring(ks1,
ks1 + 1));
tmp = kb  c1 + kd * c2;
while (tmp < 0)
tmp += 1024;
byte s2 = (byte) (tmp % 1024);
int js2 = (int) s2 >> 4 & 0xf;
smi.append(CharSet.substring(js2,
js2 + 1));
int ks2 = s2 & 0xf;
smi.append(CharSet.substring(ks2,
ks2 + 1));
}
if (js == 1) {
byte s3 = (byte) ((sRead[byteread - 1] - 4) % 1024);
int js3 = (int) s3 >> 4 & 0xf;
smi.append(CharSet.substring(js3,
js3 + 1));
int ks3 = (int) s3 & 0xf;
smi.append(CharSet.substring(ks3,
ks3 + 1));
}
fw.write(smi.toString());
}
fw.flush();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fw.close();
inStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(!chooser2.getFileFilter().accept(chooser2.getSelectedFile()))
chooser2.getSelectedFile().renameTo(new File(chooser2.getSelectedFile().getAbsolutePath()+".txt"));
}
}
}
}


87.菜單勾選/取消開機自啟動程序


88.菜單勾選/取消自動登錄系統


89.模擬鍵盤輸入字符串
/
import java.awt.;
import java.awt.event.;
throws Exception{/
static Robot robot;
static{
try {
robot = new Robot();
} catch (AWTException e) {}
}


static void sendKey(String ks){
KeyStore k = KeyStore.findKeyStore(ks);
if(k!=null){
if(k.upCase)
upCase(k.v);
else
sendKey(k.v);
}
else{
for(int i=0; i<ks.length(); i++){
char c = ks.charAt(i);
if(c>='0'&&c<='9'){
sendKey(c);
}
else if(c>='a'&&c<='z'){
sendKey(c-32);
}
else if(c>='A'&&c<='Z'){
upCase(c);
}
}
}
}
private static void upCase(int kc){
robot.keyPress(KeyEvent.VK_SHIFT);
robot.keyPress(kc);
robot.keyRelease(kc);
robot.keyRelease(KeyEvent.VK_SHIFT);
}
private static void sendKey(int kc){
robot.keyPress(kc);
robot.keyRelease(kc);
}
static class KeyStore{
//special keys
final static KeyStore[] sp = {
new KeyStore("{Tab}",KeyEvent.VK_TAB),//tab
new KeyStore("{Enter}",KeyEvent.VK_ENTER),//enter
new KeyStore("{PUp}",KeyEvent.VK_PAGE_UP),//page up
new KeyStore("{<}",KeyEvent.VK_LESS),//<
new KeyStore("{Up}",KeyEvent.VK_UP),//up key
new KeyStore("{At}",KeyEvent.VK_AT,true),//@
new KeyStore("{Dollar}",KeyEvent.VK_DOLLAR,true),//$
};


String k;
int v;
boolean upCase;
KeyStore(String k,int v){
this(k,v,false);
}


KeyStore(String s,int i,boolean up){
k=s;
v=i;
upCase=up;
}
static KeyStore findKeyStore(String k){
for(int i=0; i<sp.length; i++){
if(sp[i].k.equals(k))
return sp[i];
}
return null;
}
}
Thread.sleep(1000);
sendKey("{Tab}");//tab
sendKey("{<}");//<
sendKey("abcd123AHahahAA");//abcd123AHahahAA
sendKey("{At}");//@
sendKey("{Dollar}");//$
sendKey("{Up}");//up arrow


90.提取PDF文件中的文本
//http://incubator.apache.org/pdfbox/
/
import java.io.;
import org.pdfbox.pdfparser.;
import org.pdfbox.pdmodel.;
import org.pdfbox.util.;/
public class SimplePDFReader {
/**


    

  • simply reader all the text from a pdf file.
    • 

  • You have to deal with the format of the output text by yourself.
    • 

  • 2008-2-25
    • 

  • @param pdfFilePath file path
    • 

  • @return all text in the pdf file
*/
public static String getTextFromPDF(String pdfFilePath) {
String result = null;
FileInputStream is = null;
PDDocument document = null;
try {
is = new FileInputStream(pdfFilePath);
PDFParser parser = new PDFParser(is);
parser.parse();
document = parser.getPDDocument();
PDFTextStripper stripper = new PDFTextStripper();
result = stripper.getText(document);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (document != null) {
try {
document.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return result;
}
}
得到PDF的文本內容之后，自己根據文件的格式，取得想要的文本（這里我找的就是文章的標題，在文本中恰巧都是文件的第一行的內容），然后通過java的File相關api，對文件進行更名操作。
import java.io.File;
import java.io.FilenameFilter;
    • 



public class PaperNameMender {
public static void changePaperName(String filePath) {
//使用SimplePDFReader得到pdf文本
String ts = SimplePDFReader.getTextFromPDF(filePath);
//取得一行內容
String result = ts.substring(0, ts.indexOf('\n'));
//得到源文件名中的最后一個逗點.的位置
int index = filePath.indexOf('.');
int nextIndex = filePath.indexOf('.', index + 1);
while(nextIndex != -1) {
index = nextIndex;
nextIndex = filePath.indexOf('.', index + 1);
}
//合成新文件名
String newFilename = filePath.substring(0, index) + " " +
result.trim() + ".pdf";
File originalFile = new File(filePath);
//修改文件名
originalFile.renameTo(new File(newFilename));
}
}


91.操作內存映射文件
/
import java.io.;
import java.nio.;
import java.nio.channels.;
*/
private static int length = 0x8FFFFFF; // 128 Mb
MappedByteBuffer out =
new RandomAccessFile("test.dat", "rw").getChannel()
.map(FileChannel.MapMode.READ_WRITE, 0, length);
for(int i = 0; i < length; i++)
out.put((byte)'x');
for(int i = length/2; i < length/2 + 6; i++)
//(char)out.get(i);


92.重定向windows控制臺程序的輸出信息
92.1 取得Runtime.getRuntime().exec("cmd /c dir")的輸入輸出
//import java.io.*;
try {
String command = "cmd /c dir";
Process proc = Runtime.getRuntime().exec(command);
InputStreamReader ir = new InputStreamReader(proc.getInputStream());
LineNumberReader lnr = new LineNumberReader(ir);
String line;
while( (line = lnr.readLine()) != null)
{
//line
}
} catch (IOException e) {
e.printStackTrace();
}


92.2 利用ProcessBuilder來創建Process對象，執行外部可執行程序
// //Eg1:
// String address = null;
//
// String os = System.getProperty("os.name");
// System.out.println(os);
//
// if (os != null) {
// if (os.startsWith("Windows")) {
// try {
// ProcessBuilder pb = new ProcessBuilder("ipconfig", "/all");
// Process p = pb.start();
//
// BufferedReader br = new BufferedReader(
// new InputStreamReader(p.getInputStream()));
//
// String line;
// while ((line = br.readLine()) != null) {
// if (line.indexOf("Physical Address") != -1) {
// int index = line.indexOf(":");
// address = line.substring(index + 1);
// break;
// }
// }
// br.close();
// address = address.trim();
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// } else if (os.startsWith("Linux")) {
// try {
// ProcessBuilder pb = new ProcessBuilder(
//
// "ifconfig", "/all");
//
// Process p = pb.start();
// BufferedReader br = new BufferedReader(
// new InputStreamReader(p.getInputStream()));
// String line;
// while ((line = br.readLine()) != null) {
// int index = line.indexOf("硬件地址");
// if (index != -1) {
// address = line.substring(index + 4);
// break;
// }
// }
// br.close();
// address = address.trim();
// } catch (IOException e) {
// e.printStackTrace();
// }
// }
// }


// //Eg2:
// try {
// Process proc;
// proc = Runtime.getRuntime().exec("cmd.exe");
// BufferedReader read = new BufferedReader(new InputStreamReader(proc
// .getInputStream()));
// new Thread(new Echo(read)).start();
//
// PrintWriter out = new PrintWriter(new OutputStreamWriter(proc
// .getOutputStream()));
// BufferedReader in = new BufferedReader(new InputStreamReader(
// System.in));
// String instr = in.readLine();
// while (!"exit".equals(instr)) {
// instr = in.readLine();
// out.println(instr);
// out.flush();
// }
//
// in.readLine();
// read.close();
// out.close();
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }


}
}


class Echo implements Runnable {
private BufferedReader read;


public Echo(BufferedReader read) {
read = read;
}


public void run() {
try {
String line = read.readLine();
while (line != null) {
//line
line = read.readLine();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}


93.序列化
//import java.io.*;
class tree implements Serializable{
public tree left;
public tree right;
public int id;
public int level;


private static int count = 0 ;


public tree( int depth) {
id = count ++ ;
level = depth;
if (depth > 0 ) {
left = new tree(depth - 1 );
right = new tree(depth - 1 );
}
}


public void print( int levels) {
for ( int i = 0 ; i < level; i ++ )
System.out.print( " " );
System.out.println( " node " + id);


if (level <= levels && left != null )
left.print(levels);


if (level <= levels && right != null )
right.print(levels);
}
}
try {
// / 創建一個文件寫入序列化樹。 /
FileOutputStream ostream = new FileOutputStream(%%1);
// / 創建輸出流 /
ObjectOutputStream p = new ObjectOutputStream(ostream);


/*/ / 創建一個二層的樹。 */
tree base = new tree( 2 );


p.writeObject(base); // 將樹寫入流中。
p.writeObject( " LiLy is 惠止南國 " );
p.flush();
ostream.close(); // 關閉文件。
} catch (Exception ex) {
ex.printStackTrace();
}
}


94.反序列化
//import java.io.*;
class tree implements Serializable{
public tree left;
public tree right;
public int id;
public int level;


private static int count = 0 ;


public tree( int depth) {
id = count ++ ;
level = depth;
if (depth > 0 ) {
left = new tree(depth - 1 );
right = new tree(depth - 1 );
}
}


public void print( int levels) {
for ( int i = 0 ; i < level; i ++ )
System.out.print( " " );
System.out.println( " node " + id);


if (level <= levels && left != null )
left.print(levels);


if (level <= levels && right != null )
right.print(levels);
}
}
try {
FileInputStream istream = new FileInputStream(%%1);
ObjectInputStream q = new ObjectInputStream(istream);


/*/ / 讀取樹對象，以及所有子樹 */
tree new_tree = (tree)q.readObject();


new_tree.print( 2 ); // 打印出樹形結構的最上面 ２級
String name = (String)q.readObject();
System.out.println( " \n " + name);
} catch (Exception ex) {
ex.printStackTrace();
}
}


95.報表相關
//http://www.jfree.org/jfreechart/
/
import java.io.;
import java.awt.;
import org.jfree.chart.;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.;/
String title = "夢澤科技員工學歷情況統計";
DefaultPieDataset piedata = new DefaultPieDataset();
piedata.setValue("大專", 8.1);
piedata.setValue("大學", 27.6);
piedata.setValue("碩士", 53.2);
piedata.setValue("博士及以上", 19.2);
piedata.setValue("大專以下", 1.9);
JFreeChart chart = ChartFactory.createPieChart(title, piedata, true, true, true);
chart.setTitle(new TextTitle(title, new Font("宋體", Font.BOLD, 25)));
chart.addSubtitle(new TextTitle("最后更新日期：2005年5月19日", new Font("楷書", Font.ITALIC, 18)));
chart.setBackgroundPaint(Color.white);
try {
ChartUtilities.saveChartAsJPEG(new File("PieChart.jpg"), chart, 360, 300);
} catch (IOException exz) {
System.err.print("....Cant′t Create image File");
}


96.全屏幕截取
/
import java.awt.;
import java.awt.image.;
import java.io.;
import javax.imageio.;/
try{
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
BufferedImage screenshot = (new Robot())
.createScreenCapture(new Rectangle(0, 0,
(int) d.getWidth(), (int) d.getHeight()));
// 根據文件前綴變量和文件格式變量，自動生成文件名
String name = %%1 + "."


    

  • %%2; //"png"
File f = new File(name);
ImageIO.write(screenshot, %%2, f);
} catch (Exception ex) {
ex.printStackTrace();
}
    • 



97.區域截屏
/
import java.awt.;
import java.awt.image.;
import java.io.;
import java.util.;
import javax.imageio.;
/
interface ImageType {
public final static String JPG = "JPG";
public final static String PNG = "PNG";
public final static String GIF = "GIF";
}
public class ScreenDumpHelper {
/** ScreenDumpHelper 靜態對象 /
private static ScreenDumpHelper defaultScreenDumpHelper;
public static ScreenDumpHelper getDefaultScreenDumpHelper() {
if (defaultScreenDumpHelper == null)
return new ScreenDumpHelper();
return defaultScreenDumpHelper;
}
public ScreenDumpHelper() {
Dimension dime = Toolkit.getDefaultToolkit().getScreenSize();
setScreenArea(new Rectangle(dime));
}
private Rectangle screenArea;


public Rectangle getScreenArea() {
return screenArea;
}


public void setScreenArea(Rectangle screenArea) {
screenArea = screenArea;
}


public void setScreenArea(int x, int y, int width, int height) {
screenArea = new Rectangle(x, y, width, height);
}
private BufferedImage getBufferedImage() throws AWTException {
BufferedImage imgBuf = null;
;
imgBuf = (new Robot()).createScreenCapture(getScreenArea());
return imgBuf;
}


/**


    

  • 將 圖像數據寫到 輸出流中去,方便再處理
*
    • 

  • @param fileFormat
    • 

  • @param output
    • 

  • @return
*/
public boolean saveToOutputStream(String fileFormat, OutputStream output) {
try {
ImageIO.write(getBufferedImage(), fileFormat, output);
} catch (AWTException e) {
return false;
// e.printStackTrace();
} catch (IOException e) {
return false;
// e.printStackTrace();
}
return true;
}
    • 



/**


    

  • 根據文件格式 返回隨機文件名稱
*
    • 

  • @param fileFormat
    • 

  • @return
*/
public String getRandomFileName(String fileFormat) {
return "screenDump_" + (new Date()).getTime() + "." + fileFormat;
}
    • 



/**


    

  • 抓取 指定區域的截圖 到指定格式的文件中 -- 這個函數是核心,所有的都是圍繞它來展開的 * 圖片的編碼并不是以后綴名來判斷: 比如s.jpg
    • 

  • 如果其采用png編碼,那么這個圖片就是png格式的
*
    • 

  • @param fileName
    • 

  • @param fileFormat
    • 

  • @return boolean
*/
public boolean saveToFile(String fileName, String fileFormat) {
if (fileName == null)
fileName = getRandomFileName(fileFormat);
try {
FileOutputStream fos = new FileOutputStream(fileName);
saveToOutputStream(fileFormat, fos);
} catch (FileNotFoundException e) {
System.err.println("非常規文件或不能創建抑或覆蓋此文件: " + fileName);
}
return true;
}
    • 



/**


    

  • 抓取 指定 Rectangle 區域的截圖 到指定格式的文件中
*
    • 

  • @param fileName
    • 

  • @param fileFormat
    • 

  • @param screenArea
    • 

  • @return
*/
public boolean saveToFile(String fileName, String fileFormat,
Rectangle screenArea) {
setScreenArea(screenArea);
return saveToFile(fileName, fileFormat);
}
    • 



/**


    

  • 抓取 指定區域的截圖 到指定格式的文件中
*
    • 

  • @param fileName
    • 

  • @param fileFormat
    • 

  • @param x
    • 

  • @param y
    • 

  • @param width
    • 

  • @param height
*/
public boolean saveToFile(String fileName, String fileFormat, int x, int y,
int width, int height) {
setScreenArea(x, y, width, height);
return saveToFile(fileName, fileFormat);
}
    • 



/**


    

  • 將截圖使用 JPG 編碼
*
    • 

  • @param fileName
*/
public void saveToJPG(String fileName) {
saveToFile(fileName, ImageType.JPG);
}
    • 



public void saveToJPG(String fileName, Rectangle screenArea) {
saveToFile(fileName, ImageType.JPG, screenArea);
}


public void saveToJPG(String fileName, int x, int y, int width, int height) {
saveToFile(fileName, ImageType.JPG, x, y, width, height);
}


/**


    

  • 將截圖使用 PNG 編碼
*
    • 

  • @param fileName
*/
public void saveToPNG(String fileName) {
saveToFile(fileName, ImageType.PNG);
}
    • 



public void saveToPNG(String fileName, Rectangle screenArea) {
saveToFile(fileName, ImageType.PNG, screenArea);
}


public void saveToPNG(String fileName, int x, int y, int width, int height) {
saveToFile(fileName, ImageType.PNG, x, y, width, height);
}


public void saveToGIF(String fileName) {
throw new UnsupportedOperationException("不支持保存到GIF文件");
// saveToFile(fileName, ImageType.GIF);
}


/**


    

  • @param args
/
public static void main(String[] args) {
for (int i = 0; i < 5; i++)
ScreenDumpHelper.getDefaultScreenDumpHelper().saveToJPG(null,
i  150, i * 150, 400, 300);
}
}
    • 



98.計算文件MD5值
/
import java.io.;
import java.math.;
import java.security.;
import java.util.;/
File file=new File(%%1);
if (!file.isFile()){
return null;
}
MessageDigest digest = null;
FileInputStream in=null;
byte buffer[] = new byte[1024];
int len;
try {
digest = MessageDigest.getInstance("MD5");
in = new FileInputStream(file);
while ((len = in.read(buffer, 0, 1024)) != -1) {
digest.update(buffer, 0, len);
}
in.close();
} catch (Exception e) {
e.printStackTrace();
return null;
}
BigInteger bigInt = new BigInteger(1, digest.digest());
return bigInt.toString(16);
}


99.計算獲取文件夾中文件的MD5值
/
import java.io.;
import java.math.;
import java.security.;
import java.util.;/
public static String getFileMD5(File file) {
if (!file.isFile()){
return null;
}
MessageDigest digest = null;
FileInputStream in=null;
byte buffer[] = new byte[1024];
int len;
try {
digest = MessageDigest.getInstance("MD5");
in = new FileInputStream(file);
while ((len = in.read(buffer, 0, 1024)) != -1) {
digest.update(buffer, 0, len);
}
in.close();
} catch (Exception e) {
e.printStackTrace();
return null;
}
BigInteger bigInt = new BigInteger(1, digest.digest());
return bigInt.toString(16);
}
/**


    

  • 獲取文件夾中文件的MD5值
    • 

  • @param file
    • 

  • @param listChild ;true遞歸子目錄中的文件
    • 

  • @return
*/
public static Map<String, String> getDirMD5(File file,boolean listChild) {
if(!file.isDirectory()){
return null;
}
//<filepath,md5>
Map<String, String> map=new HashMap<String, String>();
String md5;
File files[]=file.listFiles();
for(int i=0;i<files.length;i++){
File f=files[i];
if(f.isDirectory()&&listChild){
map.putAll(getDirMD5(f, listChild));
} else {
md5=getFileMD5(f);
if(md5!=null){
map.put(f.getPath(), md5);
}
}
}
return map;
}
getDirMD5(%%1,%%2);
    • 



100.復制一個目錄下所有文件到一個文件夾中
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
LinkedList<String> folderList2 = new LinkedList<String>();
folderList2.add(%%2+ %%1.substring(%%1.lastIndexOf("\")));
while (folderList.size() > 0) {
File folders = new File(folderList.peek());
String[] file = folders.list();
File temp = null;
try {
for (int i = 0; i < file.length; i++) {
if (folderList.peek().endsWith(File.separator)) {
temp = new File(folderList.peek() + File.separator


    

  • file[i]);
} else {
temp = new File(folderList.peek() + File.separator
    • 

  • file[i]);
}
if (temp.isFile()) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(
new File(%%2,temp.getName()));
byte[] b = new byte[10240];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
if (temp.isDirectory()) {// 如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
    • 

  • File.separator + f.getName());
}
}
}
}
} catch (IOException e) {
System.err.println("復制整個文件夾內容操作出錯");
}
folderList.removeFirst();
folderList2.removeFirst();
}
    • 



101.移動一個目錄下所有文件到一個文件夾中
/
import java.io.;
import java.util.;/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
LinkedList<String> folderList2 = new LinkedList<String>();
folderList2.add(%%2 + %%1.substring(%%1.lastIndexOf("\")));
while (folderList.size() > 0) {
File folders = new File(folderList.peek());
String[] file = folders.list();
File temp = null;
try {
for (int i = 0; i < file.length; i++) {
if (folderList.peek().endsWith(File.separator)) {
temp = new File(folderList.peek() + File.separator


    

  • file[i]);
} else {
temp = new File(folderList.peek() + File.separator
    • 

  • file[i]);
}
if (temp.isFile()) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(
new File(%%2,temp.getName()));
byte[] b = new byte[10240];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
if (!temp.delete())
//刪除單個文件操作出錯
}
if (temp.isDirectory()) {// 如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
    • 

  • File.separator + f.getName());
}
}
}
}
} catch (Exception e) {
//復制整個文件夾內容操作出錯
e.printStackTrace();
}
folderList.removeFirst();
folderList2.removeFirst();
}
File f = new File(%%1);
if (!f.delete()) {
for (File file : f.listFiles()) {
if (file.list().length == 0) {
file.delete();
}
}
}
    • 



102.文件RSA高級加密
/
import javax.crypto.;
import java.security.;
import java.security.spec.;
import java.security.interfaces.;
import java.io.;
import java.math.BigInteger;
*/
/**


    

  • 生成密鑰對
    

    • 

  • @return KeyPair
    

    • 

  • @throws EncryptException
    

    • 



*/


public static KeyPair generateKeyPair() throws EncryptException {


try {


KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA",


new org.bouncycastle.jce.provider.BouncyCastleProvider());


final int KEY_SIZE = 1024;//沒什么好說的了，這個值關系到塊加密的大小，可以更改，但是不要太大，否則效率會低


keyPairGen.initialize(KEY_SIZE, new SecureRandom());


KeyPair keyPair = keyPairGen.genKeyPair();


return keyPair;


} catch (Exception e) {


throw new EncryptException(e.getMessage());


}


}


/**


    

  • 生成公鑰
    

    • 

  • @param modulus
    

    • 

  • @param publicExponent
    

    • 

  • @return RSAPublicKey
    

    • 

  • @throws EncryptException
    

    • 



*/


public static RSAPublicKey generateRSAPublicKey(byte[] modulus, byte[] publicExponent) throws EncryptException {


KeyFactory keyFac = null;


try {


keyFac = KeyFactory.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());


} catch (NoSuchAlgorithmException ex) {


throw new EncryptException(ex.getMessage());


}


RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(modulus), new BigInteger(publicExponent));


try {


return (RSAPublicKey) keyFac.generatePublic(pubKeySpec);


} catch (InvalidKeySpecException ex) {


throw new EncryptException(ex.getMessage());


}


}
/**


    

  • 生成私鑰
    

    • 

  • @param modulus
    

    • 

  • @param privateExponent
    

    • 

  • @return RSAPrivateKey
    

    • 

  • @throws EncryptException
    

    • 



*/


public static RSAPrivateKey generateRSAPrivateKey(byte[] modulus, byte[] privateExponent) throws EncryptException {


KeyFactory keyFac = null;


try {


keyFac = KeyFactory.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());


} catch (NoSuchAlgorithmException ex) {


throw new EncryptException(ex.getMessage());


}


RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(new BigInteger(modulus), new BigInteger(privateExponent));


try {


return (RSAPrivateKey) keyFac.generatePrivate(priKeySpec);


} catch (InvalidKeySpecException ex) {


throw new EncryptException(ex.getMessage());


}


}


/**


    

  • 加密
    

    • 

  • @param key 加密的密鑰
    

    • 

  • @param data 待加密的明文數據
    

    • 

  • @return 加密后的數據
    

    • 

  • @throws EncryptException
    

    • 



*/


public static byte[] encrypt(Key key, byte[] data) throws EncryptException {


try {


Cipher cipher = Cipher.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());


cipher.init(Cipher.ENCRYPT_MODE, key);


int blockSize = cipher.getBlockSize();//獲得加密塊大小，如：加密前數據為128個byte，而key_size=1024 加密塊大小為127 byte,加密后為128個byte;因此共有2個加密塊，第一個127 byte第二個為1個byte


int outputSize = cipher.getOutputSize(data.length);//獲得加密塊加密后塊大小


int leavedSize = data.length % blockSize;


int blocksSize = leavedSize != 0 ? data.length / blockSize + 1 : data.length / blockSize;


byte[] raw = new byte[outputSize * blocksSize];


int i = 0;


while (data.length - i * blockSize > 0) {


if (data.length - i * blockSize > blockSize)


cipher.doFinal(data, i  blockSize, blockSize, raw, i  outputSize);


else


cipher.doFinal(data, i  blockSize, data.length - i  blockSize, raw, i * outputSize);
//這里面doUpdate方法不可用，查看源代碼后發現每次doUpdate后并沒有什么實際動作除了把byte[]放到ByteArrayOutputStream中，而最后doFinal的時候才將所有的byte[]進行加密，可是到了此時加密塊大小很可能已經超出了OutputSize所以只好用dofinal方法。


i++;


}


return raw;


} catch (Exception e) {


throw new EncryptException(e.getMessage());


}


}


/**


    

  • 解密
    

    • 

  • @param key 解密的密鑰
    

    • 

  • @param raw 已經加密的數據
    

    • 

  • @return 解密后的明文
    

    • 

  • @throws EncryptException
    

    • 



*/


public static byte[] decrypt(Key key, byte[] raw) throws EncryptException {


try {


Cipher cipher = Cipher.getInstance("RSA", new org.bouncycastle.jce.provider.BouncyCastleProvider());


cipher.init(cipher.DECRYPT_MODE, key);


int blockSize = cipher.getBlockSize();


ByteArrayOutputStream bout = new ByteArrayOutputStream(64);


int j = 0;


while (raw.length - j * blockSize > 0) {


bout.write(cipher.doFinal(raw, j * blockSize, blockSize));


j++;


}


return bout.toByteArray();


} catch (Exception e) {


throw new EncryptException(e.getMessage());


}


}


File file = new File("test.html");


FileInputStream in = new FileInputStream(file);


ByteArrayOutputStream bout = new ByteArrayOutputStream();


byte[] tmpbuf = new byte[1024];


int count = 0;


while ((count = in.read(tmpbuf)) != -1) {


bout.write(tmpbuf, 0, count);


tmpbuf = new byte[1024];


}


in.close();


byte[] orgData = bout.toByteArray();


KeyPair keyPair = RSAUtil.generateKeyPair();


RSAPublicKey pubKey = (RSAPublicKey) keyPair.getPublic();


RSAPrivateKey priKey = (RSAPrivateKey) keyPair.getPrivate();


byte[] pubModBytes = pubKey.getModulus().toByteArray();


byte[] pubPubExpBytes = pubKey.getPublicExponent().toByteArray();


byte[] priModBytes = priKey.getModulus().toByteArray();


byte[] priPriExpBytes = priKey.getPrivateExponent().toByteArray();


RSAPublicKey recoveryPubKey = RSAUtil.generateRSAPublicKey(pubModBytes,pubPubExpBytes);


RSAPrivateKey recoveryPriKey = RSAUtil.generateRSAPrivateKey(priModBytes,priPriExpBytes);


byte[] raw = RSAUtil.encrypt(priKey, orgData);


file = new File("encrypt_result.dat");


OutputStream out = new FileOutputStream(file);


out.write(raw);


out.close();


byte[] data = RSAUtil.decrypt(recoveryPubKey, raw);


file = new File("decrypt_result.html");


out = new FileOutputStream(file);


out.write(data);


out.flush();


out.close();


103.計算文件大小
/
import java.io.;
private final long KB=1024;
private final long MB=1024KB;
private final long GB=1024MB;
*/
//文件屬性
File file=new File(%%1);
//如果文件存在而且是文件，直接返回文件大小
if(file.exists()&&file.isFile())
{
long filesize= file.length();
String showsize;
if(filesize>=GB)
showsize=filesize/GB+" GB";
else if(filesize>=MB)
showsize=filesize/MB+" MB";
else if(filesize>=KB)
showsize=filesize/KB+" KB";
else if(filesize>1)
showsize=filesize/GB+" Bytes";
else
showsize="1 Byte";
String %%2=showsize;
}


104.計算文件夾的大小
/
import java.io.;
import java.math.;
//bt字節參考量
private static final long SIZE_BT=1024L;
//KB字節參考量
private static final long SIZE_KB=SIZE_BT1024L;
//MB字節參考量
private static final long SIZE_MB=SIZE_KB1024L;
//GB字節參考量
private static final long SIZE_GB=SIZE_MB1024L;
//TB字節參考量
private static final long SIZE_TB=SIZE_GB1024L;
private static final int SACLE=2;
//文件大小屬性
private static long longSize;/
private void getFileSize(File file) {
// 獲得文件目錄下文件對象數組
File[] fileArray = file.listFiles();
// 如果文件目錄數組不為空或者length!=0,即目錄為空目錄
if (fileArray != null && fileArray.length != 0) {
// 遍歷文件對象數組
for (int i = 0; i < fileArray.length; i++) {
File fileSI = fileArray[i];
// 如果是目錄遞歸遍歷
if (fileSI.isDirectory()) {
// 遞歸遍歷
getFileSize(fileSI);
}
// 如果是文件
if (fileSI.isFile()) {
longSize += fileSI.length();
}
}
} else {
// 如果文件目錄數組為空或者length==0,即目錄為空目錄
longSize = 0;
}
}
// 文件存在而且是目錄，遞歸遍歷文件目錄計算文件大小
File file = new File(folderPath);
if (file.exists() && file.isDirectory()) {
getFileSize(file);// 遞歸遍歷
}
String %%2="0 Byte";
if (longSize == 1) {
%%2="1 Byte";
} else if (longSize >= 2 && longSize < SIZE_BT) {
%%2=longSize + " Bytes";
} else if (longSize >= SIZE_BT && longSize < SIZE_KB) {
%%2=longSize / SIZE_BT + " KB";
} else if (longSize >= SIZE_KB && longSize < SIZE_MB) {
%%2=longSize / SIZE_KB + " MB";
} else if (longSize >= SIZE_MB && longSize < SIZE_GB) {
BigDecimal longs = new BigDecimal(Double.valueOf(longSize + "")
.toString());
BigDecimal sizeMB = new BigDecimal(Double.valueOf(SIZE_MB + "")
.toString());
String result = longs.divide(sizeMB, SACLE,
BigDecimal.ROUND_HALF_UP).toString();
// double result=longSize/(double)SIZE_MB;
%%2=result + " GB";
} else {
BigDecimal longs = new BigDecimal(Double.valueOf(longSize + "")
.toString());
BigDecimal sizeMB = new BigDecimal(Double.valueOf(SIZE_GB + "")
.toString());
String result = longs.divide(sizeMB, SACLE,
BigDecimal.ROUND_HALF_UP).toString();
%%2=result + " TB";
}


105.快速獲得當前程序的驅動器、路徑、文件名和擴展名
String %%2=%%1.substring(0,%%1.lastIndexOf(":"));
String %%5=%%1.substring(0,%%1.lastIndexOf("\"));
String %%4=%%1.substring(%%1.lastIndexOf("\")+1);
String %%3=%%1.substring(%%1.lastIndexOf('.'));


106.磁盤剩余空間計算
//import java.io.*;
File file = new File(%%1); //"C:"
long %%2 = file.getFreeSpace(); //file.getTotalSpace()


107.獲取當前程序進程ID
java是在jvm上跑的，jvm本身作為系統的一個進程在跑，
所以平時見到的都是java多線程，沒有進程間通信，
為什么呢，就是因為java中沒有進程這一說法，
除非指的是程序本身這個進程。這個進程的話需要用到系統命令或者底層c語言才能夠得到。呃，本人jni不是太熟悉，可以參考
http://hi.baidu.com/lff0305/blog/item/4f301a7b20d3d3f20bd187e3.html，
linux下直接調用ps-ef再用管道提取吧。


108.全盤搜索文件
import java.io.*;
//ArrayList fileNames=new ArrayList();
void listDirectory(String dir)
{
File f=new File(dir);
File[] files=f.listFiles();
if(files==null)
return;
for(int i=0;i<files.length;i++)
{
if(files[i].isDirectory())
{
System.out.println("-----------"+files[i]+" is a directory has more files bellow:");
listDirectory(files[i].getAbsolutePath());
//listDirectory(files[i].getName());
//listDirectory(files[i].toString());
}


else
{
System.out.println(files[i]);
}
}
}
File[] roots=File.listRoots();
for(int i=0;i<roots.length;i++)
{
System.out.println(roots[i]);
}
}
lrt.listDirectory("D:"+File.separator);</pre>
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