使用org.apache.tools.zip实现zip压缩和解压

import java.io.*;
import org.apache.tools.zip.*;
import java.util.Enumeration;
/**
*功能:zip压缩、解压(支持中文文件名)
*说明:本程序通过使用Apache Ant里提供的zip工具org.apache.tools.zip实现了zip压缩和解压功能.
*   解决了由于java.util.zip包不支持汉字的问题。
*   使用java.util.zip包时,当zip文件中有名字为中文的文件时,
*   就会出现异常:"Exception  in thread "main " java.lang.IllegalArgumentException
*               at   java.util.zip.ZipInputStream.getUTF8String(ZipInputStream.java:285)
*注意:
*   1、使用时把ant.jar放到classpath中,程序中使用import org.apache.tools.zip.*;
*   2、Apache Ant 下载地址:http://ant.apache.org/
*   3、Ant ZIP API:http://www.jajakarta.org/ant/ant-1.6.1/docs/mix/manual/api/org/apache/tools/zip/
*   4、本程序使用Ant 1.7.1 中的ant.jar
*
*仅供编程学习参考.
*
*@author Winty
*@date   2008-8-3
*@Usage:
*   压缩:java AntZip -zip "directoryName"
*   解压:java AntZip -unzip "fileName.zip"
*/

public class AntZip{
private ZipFile         zipFile;
private ZipOutputStream zipOut;     //压缩Zip
private ZipEntry        zipEntry;
private static int      bufSize;    //size of bytes
private byte[]          buf;
private int             readedBytes;

public AntZip(){
this(512);
}

public AntZip(int bufSize){
this.bufSize = bufSize;
this.buf = new byte[this.bufSize];
}

//压缩文件夹内的文件
public void doZip(String zipDirectory){//zipDirectoryPath:需要压缩的文件夹名
File file;
File zipDir;

zipDir = new File(zipDirectory);
String zipFileName = zipDir.getName() + ".zip";//压缩后生成的zip文件名

try{
this.zipOut = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFileName)));
handleDir(zipDir , this.zipOut);
this.zipOut.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}

//由doZip调用,递归完成目录文件读取
private void handleDir(File dir , ZipOutputStream zipOut)throws IOException{
FileInputStream fileIn;
File[] files;

files = dir.listFiles();

if(files.length == 0){//如果目录为空,则单独创建之.
//ZipEntry的isDirectory()方法中,目录以"/"结尾.
this.zipOut.putNextEntry(new ZipEntry(dir.toString() + "/"));
this.zipOut.closeEntry();
}
else{//如果目录不为空,则分别处理目录和文件.
for(File fileName : files){
//System.out.println(fileName);

if(fileName.isDirectory()){
handleDir(fileName , this.zipOut);
}
else{
fileIn = new FileInputStream(fileName);
this.zipOut.putNextEntry(new ZipEntry(fileName.toString()));

while((this.readedBytes = fileIn.read(this.buf))>0){
this.zipOut.write(this.buf , 0 , this.readedBytes);
}

this.zipOut.closeEntry();
}
}
}
}

//解压指定zip文件
public void unZip(String unZipfileName){//unZipfileName需要解压的zip文件名
FileOutputStream fileOut;
File file;
InputStream inputStream;

try{
this.zipFile = new ZipFile(unZipfileName);

for(Enumeration entries = this.zipFile.getEntries(); entries.hasMoreElements();){
ZipEntry entry = (ZipEntry)entries.nextElement();
file = new File(entry.getName());

if(entry.isDirectory()){
file.mkdirs();
}
else{
//如果指定文件的目录不存在,则创建之.
File parent = file.getParentFile();
if(!parent.exists()){
parent.mkdirs();
}

inputStream = zipFile.getInputStream(entry);

fileOut = new FileOutputStream(file);
while(( this.readedBytes = inputStream.read(this.buf) ) > 0){
fileOut.write(this.buf , 0 , this.readedBytes );
}
fileOut.close();

inputStream.close();
}
}
this.zipFile.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}

//设置缓冲区大小
public void setBufSize(int bufSize){
this.bufSize = bufSize;
}

//测试AntZip类
public static void main(String[] args)throws Exception{
if(args.length==2){
String name = args[1];
AntZip zip = new AntZip();

if(args[0].equals("-zip"))
zip.doZip(name);
else if(args[0].equals("-unzip"))
zip.unZip(name);
}
else{
System.out.println("Usage:");
System.out.println("压缩:java AntZip -zip directoryName");
System.out.println("解压:java AntZip -unzip fileName.zip");
throw new Exception("Arguments error!");
}
}
}