使用java.util.zip实现文件压缩和解压

java.util.zip只支持UTF-8,Ant里面可以指定编码

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class ZipTest
{
    /**解压zip*/
    private ZipInputStream zipIn;
    /**压缩zip*/
    private ZipOutputStream zipOut;
    private ZipEntry zipEntry;
    private static int bufSize;
    private byte[] buf;
    private int readedBytes;

    public ZipTest()
    {
        this(512);
    }

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

    /**
     * 压缩文件夹的文件
     * @param zipDirectory 需要压缩的文件夹名
     */
    public void doZip(String zipDirectory)
    {
        File file;
        File zipDir;

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

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

    /**
     * 由doZip调用,递归完成目录文件读取
     * @param dir
     * @param zipOut
     * @throws IOException
     */
    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
            //ZipEntry的isDirectory()方法中，目录是以"/"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(int i=0;i<files.length;i++)
            {
                File fileName=(File)files[i];
                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
     * @param unZipfileName 需要解压的zip文件名
     */
    public void unZip(String unZipfileName)
    {
        FileOutputStream fileOut;
        File file;
        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
                {
                    //如果指定目录不存在，则创建
                    File parent = file.getParentFile();
                    if(!parent.exists())
                    {
                        parent.mkdirs();
                    }
                    fileOut = new FileOutputStream(file);
                    while((this.readedBytes = this.zipIn.read(this.buf))>0)
                    {
                        fileOut.write(this.buf,0,this.readedBytes);
                    }
                    fileOut.close();
                }
                this.zipIn.closeEntry();
            }
        }
        catch (Exception e) {
           e.printStackTrace();
        }
    }

    public void setBufSize(int bufSize)
    {
        this.bufSize = bufSize;
    }

    public static void main(String args[]) throws Exception
    {
        ZipTest ziptest = new ZipTest();
        //ziptest.doZip("D:\\tmp");
        ziptest.unZip("D:\\workspace\\iipsmssend\\tmp.zip");
    }
}