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java压缩文件夹或文件zip

减小字体 增大字体 作者:佚名  来源:本站整理  发布时间:2010-06-07 22:58:12

压缩文件夹代码:

Java code复制代码
import java.io.File;
import org.apache.tools.zip.ZipOutputStream; //这个包在ant.jar里,要到官方网下载
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipEntry;

public class CompressBook {
    public CompressBook() {}

    /**//*
    * inputFileName 输入一个文件夹
    * zipFileName 输出一个压缩文件夹
    */
    public void zip(String inputFileName) throws Exception {
        String zipFileName = "c:\\test.zip"; //打包后文件名字
        System.out.println(zipFileName);
        zip(zipFileName, new File(inputFileName));
    }

    private void zip(String zipFileName, File inputFile) throws Exception {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
        zip(out, inputFile, "");
        System.out.println("zip done");
        out.close();
    }

    private void zip(ZipOutputStream out, File f, String base) throws Exception {
        if (f.isDirectory()) {
           File[] fl = f.listFiles();
           out.putNextEntry(new org.apache.tools.zip.ZipEntry(base + "/"));
           base = base.length() == 0 ? "" : base + "/";
           for (int i = 0; i < fl.length; i++) {
           zip(out, fl[i], base + fl[i].getName());
         }
        }else {
           out.putNextEntry(new org.apache.tools.zip.ZipEntry(base));
           FileInputStream in = new FileInputStream(f);
           int b;
           System.out.println(base);
           while ( (b = in.read()) != -1) {
            out.write(b);
         }
         in.close();
       }
    }

    public static void main(String [] temp){
        CompressBook book = new CompressBook();
        try {
           book.zip("c:\\c");//你要压缩的文件夹
        }catch (Exception ex) {
           ex.printStackTrace();
       }
    }
}

压缩文件代码:

Java code复制代码
import java.io.*;
import java.util.zip.*;//ZipOutputStream这个流在这里
import java.util.*;

public class ZipOutputStreamTest
{
     public static void main(String[] args) throws Exception
     {
       File f = new File("a.jpg");
       FileInputStream fis = new FileInputStream(f);
       BufferedInputStream bis = new BufferedInputStream(fis);
       byte[] buf = new byte[1024];
       int len;
       FileOutputStream fos = new FileOutputStream(f.getName()+".zip");
       BufferedOutputStream bos = new BufferedOutputStream(fos);
       ZipOutputStream zos = new ZipOutputStream(bos);//压缩包
       ZipEntry ze = new ZipEntry(f.getName());//这是压缩包名里的文件名
       zos.putNextEntry(ze);//写入新的 ZIP 文件条目并将流定位到条目数据的开始处

       while((len=bis.read(buf))!=-1)
       {
          zos.write(buf,0,len);
          zos.flush();
       }
       bis.close();
       zos.close();
     }
}

Tags:Java 压缩文件 压缩文件夹

作者:佚名
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