import java.io.*;
import java.util.zip.*;
/**
*功能:zip压缩、解压
*说明:本程序通过ZipOutputStream和ZipInputStream实现了zip压缩和解压功能.
*问题:由于java.util.zip包并不支持汉字,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)
*解决:
* 方法1、修改import java.util.zip.ZipInputStream和ZipOutputStream.
* java.util.zip只支持UTF-8,Ant里面可以指定编码.
* 方法2、使用Apache Ant里提供的zip工具。
* 不使用java.util.zip的包,把ant.jar放到classpath中.
* 程序中使用import org.apache.tools.zip.*;
*
*仅供编程学习参考.
*
*@author Winty
*@date 2008-8-3
*@Usage:
* 压缩:java Zip -zip "directoryName"
* 解压:java Zip -unzip "fileName.zip"
*/
public class Zip{
private static int bufSize; //size of bytes
private byte[] buf;
private int readedBytes;
public Zip(){
this(512);
}
public Zip(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
zipDir
= new File(zipDirectory
);
String zipFileName
= zipDir.
getName() + ".zip";//压缩后生成的zip文件名
try{
handleDir(zipDir , this.zipOut);
this.zipOut.close();
ioe.printStackTrace();
}
}
//由doZip调用,递归完成目录文件读取
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{
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
try{
while((this.zipEntry = this.zipIn.getNextEntry()) != null){
file
= new File(this.
zipEntry.
getName());
//System.out.println(file);///
if(this.zipEntry.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();
}
while(( this.readedBytes = this.zipIn.read(this.buf) ) > 0){
fileOut.write(this.buf , 0 , this.readedBytes );
}
fileOut.close();
}
this.zipIn.closeEntry();
}
ioe.printStackTrace();
}
}
//设置缓冲区大小
public void setBufSize(int bufSize){
this.bufSize = bufSize;
}
//测试Zip类
if(args.length==2){
Zip zip = new Zip();
if(args[0].equals("-zip"))
zip.doZip(name);
else if(args[0].equals("-unzip"))
zip.unZip(name);
}
else{
System.
out.
println("压缩:java Zip -zip directoryName");
System.
out.
println("解压:java Zip -unzip fileName.zip");
}
}
}