java zip压缩与解压-支持空目录，保留文件修改时间。

依赖于commons-io,commons-compress

[Java]代码

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;

import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;

import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;

import org.apache.commons.io.IOUtils;

public class ZipFileUtil {

/**

* 把一个目录打包到一个指定的zip文件中

*

* @param dirpath

* 目录路径

* @param zipPath

* zip文件路径

*/

public static void compressFoldToZip(String dirpath, String zipPath) {

compressFoldToZip(dirpath,zipPath,"");

}

/**

* 把一个目录打包到一个指定的zip文件中

* @param dirpath

* @param zipPath

* @param entryPath 压缩内文件逻辑路径。如static/

*/

public static void compressFoldToZip(String dirpath, String zipPath,String entryPath){

if(!entryPath.endsWith(File.separator)&&StringUtil.checkNotEmpty(entryPath)){

entryPath+=File.separator;

}

ZipArchiveOutputStream out = null;

try {

out = new ZipArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(new File(zipPath))));

out.setEncoding("UTF-8");

compressFoldToZip(out, dirpath, entryPath);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

IOUtils.closeQuietly(out);

}

}

/**

* 把一个目录打包到一个指定的zip文件中

*

* @param out

* @param dirpath

* 目录路径

* @param entryPath

* zip中文件的逻辑路径

*/

private static void compressFoldToZip(ZipArchiveOutputStream out, String dirpath, String entryPath) {

InputStream ins = null;

File dir = new File(dirpath);

File[] files = dir.listFiles();

if (files == null || files.length < 1) {

return;

}

try {

for (int i = 0; i < files.length; i++) {

// 判断此文件是否是一个文件夹

if (files[i].isDirectory()) {

if(files[i].listFiles().length>0){

compressFoldToZip(out, files[i].getAbsolutePath(), entryPath + files[i].getName() + File.separator);

}else{

addFileToZip(files[i], out, entryPath);

}

} else {

addFileToZip(files[i], out, entryPath);

}

}

out.flush();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

IOUtils.closeQuietly(ins);

}

}

private static void addFileToZip(File file, ZipArchiveOutputStream out, String entryPath) {

InputStream ins = null;

try {

String path=entryPath + file.getName();

if(file.isDirectory()){

path=formatDirPath(path); //为了在压缩文件中包含空文件夹

}

ZipArchiveEntry entry = new ZipArchiveEntry(path);

entry.setTime(file.lastModified());

// entry.setSize(files[i].length());

out.putArchiveEntry(entry);

if(!file.isDirectory()){

ins = new BufferedInputStream(new FileInputStream(file.getAbsolutePath()));

IOUtils.copy(ins, out);

}

out.closeArchiveEntry();

} catch (IOException e) {

e.printStackTrace();

} finally {

IOUtils.closeQuietly(ins);

}

}

/**

* 解压zip文件到指定目录

*

* @param zipPath

* @param destDir

*/

public static void unZipToFold(String zipPath, String destDir) {

ZipArchiveInputStream ins = null;

OutputStream os = null;

File zip = new File(zipPath);

if (!zip.exists()) {

return;

}

File dest = new File(destDir);

if (!dest.exists()) {

dest.mkdirs();

}

destDir=formatDirPath(destDir);

try {

ins = new ZipArchiveInputStream(new BufferedInputStream(new FileInputStream(zipPath)), "UTF-8");

ZipArchiveEntry entry = null;

while ((entry = ins.getNextZipEntry()) != null) {

if (entry.isDirectory()) {

File directory = new File(destDir, entry.getName());

directory.mkdirs();

directory.setLastModified(entry.getTime());

} else {

String absPath=formatPath(destDir+entry.getName());

mkdirsForFile(absPath);

File tmpFile=new File(absPath);

os=new BufferedOutputStream(new FileOutputStream(tmpFile));

IOUtils.copy(ins, os);

IOUtils.closeQuietly(os);

tmpFile.setLastModified(entry.getTime());

}

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

IOUtils.closeQuietly(ins);

}

}

private static String formatPath(String path){

path=path.replace('\\', File.separatorChar);

path=path.replace('/', File.separatorChar);

return path;

}

private static String formatDirPath(String dir){

if(!dir.endsWith(File.separator)){

dir+=File.separator;

}

return dir;

}

private static void mkdirsForFile(String filePath){

String absPath=filePath;

String tmpPath=absPath.substring(0,absPath.lastIndexOf(File.separator));

File tmp=new File(tmpPath);

if(!tmp.exists()){

tmp.mkdirs();

}

}

public static void main(String[] args) {

compressFoldToZip("D:\\new2\\feiq", "D:\\zip\\my.zip");

//unZipToFold("D:\\zip\\my.zip", "D:\\zip\\unzip");

}

}