commons-compress操作zip文件(壓縮和解壓縮)

commons-compress操作zip文件(壓縮和解壓縮) 有需要的同學可參考一下。

Apache Commons Compress是一個壓縮、解壓縮文件的類庫。

　　可以操作ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200 and bzip2格式的文件，功能比較強大。

　　在這里寫兩個用Commons Compress把文件壓縮成zip和從zip解壓縮的方法。

　　直接貼上工具類代碼。

package cn.luxh.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.zip.Zip64Mode;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
/**

Zip文件工具類
@author Luxh
*/
public class ZipFileUtil {

/**

把文件壓縮成zip格式
@param files 需要壓縮的文件
@param zipFilePath 壓縮后的zip文件路徑 ,如"D:/test/aa.zip";
*/
public static void compressFiles2Zip(File[] files,String zipFilePath) {
if(files != null && files.length >0) {
if(isEndsWithZip(zipFilePath)) {
ZipArchiveOutputStream zaos = null;
try {
File zipFile = new File(zipFilePath);
zaos = new ZipArchiveOutputStream(zipFile);
//Use Zip64 extensions for all entries where they are required
zaos.setUseZip64(Zip64Mode.AsNeeded);

//將每個文件用ZipArchiveEntry封裝
//再用ZipArchiveOutputStream寫到壓縮文件中
for(File file : files) {
if(file != null) {
ZipArchiveEntry zipArchiveEntry = new ZipArchiveEntry(file,file.getName());
zaos.putArchiveEntry(zipArchiveEntry);
InputStream is = null;
try {
is = new FileInputStream(file);
byte[] buffer = new byte[1024 * 5]; 
int len = -1;
while((len = is.read(buffer)) != -1) {
//把緩沖區的字節寫入到ZipArchiveEntry
zaos.write(buffer, 0, len);
}
//Writes all necessary data for this entry.
zaos.closeArchiveEntry(); 
}catch(Exception e) {
throw new RuntimeException(e);
}finally {
if(is != null) 
is.close();
}
}
}
zaos.finish();
}catch(Exception e){
throw new RuntimeException(e);
}finally {
try {
if(zaos != null) {
zaos.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
}
/**

把zip文件解壓到指定的文件夾
@param zipFilePath zip文件路徑, 如 "D:/test/aa.zip"
@param saveFileDir 解壓后的文件存放路徑, 如"D:/test/"
*/
public static void decompressZip(String zipFilePath,String saveFileDir) {
if(isEndsWithZip(zipFilePath)) {
File file = new File(zipFilePath);
if(file.exists()) {
InputStream is = null;
//can read Zip archives
ZipArchiveInputStream zais = null;
try {
is = new FileInputStream(file);
zais = new ZipArchiveInputStream(is);
ArchiveEntry archiveEntry = null;
//把zip包中的每個文件讀取出來
//然后把文件寫到指定的文件夾
while((archiveEntry = zais.getNextEntry()) != null) {
//獲取文件名
String entryFileName = archiveEntry.getName();
//構造解壓出來的文件存放路徑
String entryFilePath = saveFileDir + entryFileName;
byte[] content = new byte[(int) archiveEntry.getSize()];
zais.read(content);
OutputStream os = null;
try {
//把解壓出來的文件寫到指定路徑
File entryFile = new File(entryFilePath);
os = new FileOutputStream(entryFile);
os.write(content);
}catch(IOException e) {
throw new IOException(e);
}finally {
if(os != null) {
os.flush();
os.close();
}
}

}
}catch(Exception e) {
throw new RuntimeException(e);
}finally {
try {
if(zais != null) {
zais.close();
}
if(is != null) {
is.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
}
/**

判斷文件名是否以.zip為后綴
@param fileName 需要判斷的文件名
@return 是zip文件返回true,否則返回false
*/
public static boolean isEndsWithZip(String fileName) {
boolean flag = false;
if(fileName != null && !"".equals(fileName.trim())) {
if(fileName.endsWith(".ZIP")||fileName.endsWith(".zip")){
flag = true;
}
}
return flag;
}

}
package cn.luxh.test;
import java.io.File;
import org.junit.Test;
import cn.luxh.utils.ZipFileUtil;
/**

測試ZipFileUtil的壓縮和解壓縮方法
@author Luxh
*/
public class ZipFileUtilTest {

@Test
public void testCompressFiles2Zip() {
//存放待壓縮文件的目錄
File srcFile = new File("D:/test");
//壓縮后的zip文件路徑
String zipFilePath = "d:/test2/test.zip";
if(srcFile.exists()) {
File[] files = srcFile.listFiles();
ZipFileUtil.compressFiles2Zip(files, zipFilePath);
}
}
@Test
public void testDecompressZip() {
//壓縮包所在路徑
String zipFilePath = "d:/test2/test.zip";
//解壓后的文件存放目錄
String saveFileDir = "d:/test2/";
//調用解壓方法
ZipFileUtil.decompressZip(zipFilePath, saveFileDir);
}
}</pre>