java解壓zip rar文件實例

 package com.tservice.mrn.common;

import java.io.*;
import java.util.Enumeration;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Expand;
import org.apache.tools.zip.*;
import com.github.junrar.Archive;
import com.github.junrar.rarfile.FileHeader;
public abstract class ZipUtils {
private static final int BUFFEREDSIZE = 1024;
/**

@SuppressWarnings({ "rawtypes", "resource" }) public static String
unzip(File zipFile, String unzipDir, String
zipFileName) throws IOException { ZipFile zf = new
ZipFile(zipFile); Enumeration enu = zf.entries();
String result = ""; while (enu.hasMoreElements()) {
ZipEntry entry = (ZipEntry) enu.nextElement(); String
name = entry.getName(); //
如果解壓entry是目錄，直接生成目錄即可，不用寫入，如果是文件，要將文件寫入 String
pathParent = unzipDir + "/" + zipFileName; if (!(new
File(pathParent).exists())) new
File(pathParent).mkdirs(); String path = pathParent +
"/" + name; result = result + path + "<br/>
"; File file = new File(path); if
(entry.isDirectory()) { file.mkdir(); } else { //
建議使用如下方式創建流和讀取字節，不然會有亂碼 InputStream is =
zf.getInputStream(entry); byte[] buf1 = new
byte[1024]; int len; if (!file.exists()) {
file.getParentFile().mkdirs(); file.createNewFile();
} OutputStream out = new FileOutputStream(file);
while ((len = is.read(buf1)) > 0) { String buf = new
String(buf1, 0, len); out.write(buf1, 0, len); } } }
result = "文件解壓成功，解壓文件：/n" + result; return result; }
**/
/**

解壓zip或者rar包的內容到指定的目錄下，可以處理其文件夾下包含子文件夾的情況
*
@param zipFilename
要解壓的zip或者rar包文件
@param outputDirectory
解壓后存放的目錄
/
public static void unzipZipRar(String zipFilename, String outputDirectory)
throws Exception {
File outFile = new File(outputDirectory);
if (!outFile.exists()) {
outFile.mkdirs();
}
ZipFile zipFile = new ZipFile(zipFilename);
@SuppressWarnings("rawtypes")
Enumeration en = zipFile.getEntries();
ZipEntry zipEntry = null;
while (en.hasMoreElements()) {
zipEntry = (ZipEntry) en.nextElement();
if (zipEntry.isDirectory()) {
// mkdir directory
String dirName = zipEntry.getName();
// System.out.println("=dirName is:=" + dirName + "=end=");
dirName = dirName.substring(0, dirName.length() - 1);
File f = new File(outFile.getPath() + File.separator + dirName);
f.mkdirs();
} else {
// unzip file
String strFilePath = outFile.getPath() + File.separator

zipEntry.getName();
File f = new File(strFilePath);

// 判斷文件不存在的話，就創建該文件所在文件夾的目錄
if (!f.exists()) {
String[] arrFolderName = zipEntry.getName().split("/");
String strRealFolder = "";
for (int i = 0; i < (arrFolderName.length - 1); i++) {
strRealFolder += arrFolderName[i] + File.separator;
}
strRealFolder = outFile.getPath() + File.separator

strRealFolder;
File tempDir = new File(strRealFolder);
// 此處使用.mkdirs()方法，而不能用.mkdir()
tempDir.mkdirs();
}
// the codes remedified by can_do on 2010-07-02 =end=
f.createNewFile();
InputStream in = zipFile.getInputStream(zipEntry);
FileOutputStream out = new FileOutputStream(f);
try {
int c;
byte[] by = new byte[BUFFEREDSIZE];
while ((c = in.read(by)) != -1) {
out.write(by, 0, c);
}
// out.flush();
} catch (IOException e) {
throw e;
} finally {
out.close();
in.close();
}
}
}
}

/
/

解壓zip格式壓縮包 對應的是ant.jar
/
private static void unzip(String sourceZip, String destDir)
throws Exception {
try {
Project p = new Project();
Expand e = new Expand();
e.setProject(p);
e.setSrc(new File(sourceZip));
e.setOverwrite(false);
e.setDest(new File(destDir));
/

ant下的zip工具默認壓縮編碼為UTF-8編碼， 而winRAR軟件壓縮是用的windows默認的GBK或者GB2312編碼
所以解壓縮時要制定編碼格式
*/
e.setEncoding("gbk");
e.execute();
} catch (Exception e) {
throw e;
}
}

/**

解壓rar格式壓縮包。
對應的是java-unrar-0.3.jar，但是java-unrar-0.3.jar又會用到commons-logging-1.1.1.jar
*/
private static void unrar(String sourceRar, String destDir)
throws Exception {
Archive a = null;
FileOutputStream fos = null;
try {
a = new Archive(new File(sourceRar));
FileHeader fh = a.nextFileHeader();
while (fh != null) {
if (!fh.isDirectory()) {
 // 1 根據不同的操作系統拿到相應的 destDirName 和 destFileName
 String compressFileName = fh.getFileNameString().trim();
 String destFileName = "";
 String destDirName = "";
 // 非windows系統
 if (File.separator.equals("/")) {
  destFileName = destDir

+ compressFileName.replaceAll("\\\\", "/");

destDirName = destFileName.substring(0,

destFileName.lastIndexOf("/"));

// windows系統
 } else {
  destFileName = destDir

+ compressFileName.replaceAll("/", "\\\\");

destDirName = destFileName.substring(0,

destFileName.lastIndexOf("\\"));

}
 // 2創建文件夾
 File dir = new File(destDirName);
 if (!dir.exists() || !dir.isDirectory()) {
  dir.mkdirs();
 }
 // 3解壓縮文件
 fos = new FileOutputStream(new File(destFileName));
 a.extractFile(fh, fos);
 fos.close();
 fos = null;
}
fh = a.nextFileHeader();
}
a.close();
a = null;
} catch (Exception e) {
throw e;
} finally {
if (fos != null) {
try {
 fos.close();
 fos = null;
} catch (Exception e) {
 e.printStackTrace();
}
}
if (a != null) {
try {
 a.close();
 a = null;
} catch (Exception e) {
 e.printStackTrace();
}
}
}
}
/**

解壓縮
*/
public static void deCompress(String sourceFile, String destDir)
throws Exception {
// 保證文件夾路徑最后是"/"或者"\"
char lastChar = destDir.charAt(destDir.length() - 1);
if (lastChar != '/' && lastChar != '\') {
destDir += File.separator;
}
// 根據類型，進行相應的解壓縮
String type = sourceFile.substring(sourceFile.lastIndexOf(".") + 1);
if (type.equals("zip")) {
ZipUtils.unzip(sourceFile, destDir);
} else if (type.equals("rar")) {
ZipUtils.unrar(sourceFile, destDir);
} else {
throw new Exception("只支持zip和rar格式的壓縮包！");
}
}

} </pre>