如何压缩解压文件夹（文件流）转发

package com.zip;

import java.io.File;
import java.io.BufferedOutputStream;
import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
/**
 * 该类实现文件夹压缩成zip文件和zip文件解压
 * @author Administrator
 *
 */
public class Zip{
    private ZipInputStream  zipIn;      //解压Zip
    private ZipOutputStream zipOut;     //压缩Zip
    private ZipEntry        zipEntry;
    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
        File file;
        File zipDir;

        zipDir = new File(zipDirectory);
        String zipFileName = zipDirectory + ".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(Exception 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 Exception{
        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){

                if(fileName.isDirectory()){
                    handleDir(fileName , this.zipOut);
                }
                else{
                    fileIn = new FileInputStream(fileName);
                    String name=dir.getName();
                    //生成的压缩包存放在原目录下
                    this.zipOut.putNextEntry(new ZipEntry(name+"/"+fileName.getName().toString()));
                   
                    //此方法存放在该项目目录下
                    //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;
        String f=unZipfileName.substring(0, unZipfileName.length()-4);
        File ff=new File(f);
        try{
            this.zipIn = new ZipInputStream (new
              BufferedInputStream(new FileInputStream(unZipfileName)));
            while((this.zipEntry = this.zipIn.getNextEntry()) != null){
                file = new File(this.zipEntry.getName());
                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();
                    }
                    if(!ff.exists()){
                     ff.mkdir();
                    }
                    fileOut = new FileOutputStream(f+"/"+file.getName());
                   
                    //fileOut = new FileOutputStream(file); 此方法存放到该项目目录下
                    while(( this.readedBytes = this.zipIn.read(this.buf) ) > 0){
                        fileOut.write(this.buf , 0 , this.readedBytes );
                    }
                    fileOut.close();
                }
               
                this.zipIn.closeEntry();
            }
        }catch(Exception ioe){
            ioe.printStackTrace();
        }
    }

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

    //测试Zip类
    public static void main(String[] args)throws Exception{
        Zip zip=new Zip();
//        zip.doZip("d:\\123");
        zip.unZip("d:\\123.zip");
    }
}