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java 使用org.apache.tools.zip实现zip压缩和解压

2013-02-26 18:25 791 查看
压缩

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 ... g/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!");

}

}

}

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