zip file unzip file demo

 

some demo here (http://www.example-code.com/java/zip.asp)

make zip file 

import java.io.*;
import java.util.zip.*;

class  makeZipFile {
    public static void main(String[] args) {
        if (args.length != 2) {
            System.out.println(
   "Usage: java makeZipFile [files to be zipped] [filename after zip] ");
            return;
        }
        try {
            String filename = args[0];
            String zipfilename = args[1];
            makeZipFile list = new makeZipFile( );
            list.doZip(filename,zipfilename);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public void doZip(String filename,String zipfilename) {
        try {
            byte[] buf = new byte[1024];
            FileInputStream fis = new FileInputStream(filename);
            fis.read(buf,0,buf.length);
            
            CRC32 crc = new CRC32();
            ZipOutputStream s = new ZipOutputStream(
                    (OutputStream)new FileOutputStream(zipfilename));
            
            s.setLevel(6);
            
            ZipEntry entry = new ZipEntry(filename);
            entry.setSize((long)buf.length);
            crc.reset();
            crc.update(buf);
            entry.setCrc( crc.getValue());
            s.putNextEntry(entry);
            s.write(buf, 0, buf.length);
            s.finish();
            s.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

package org.kodejava.example.util.zip;

02. 

03.import java.util.zip.ZipFile;

04.import java.util.zip.ZipEntry;

05.import java.util.Enumeration;

06.import java.io.*;

07. 

08.public class ZipFileUnzipDemo {

09.public static void main(String[] args) {

10.String zipname = "data.zip";

11. 

12.try {

13.ZipFile zipFile = new ZipFile(zipname);

14.Enumeration enumeration = zipFile.entries();

15. 

16.while (enumeration.hasMoreElements()) {

17.ZipEntry zipEntry = (ZipEntry) enumeration.nextElement();

18.System.out.println("Unzipping: "+ zipEntry.getName());

19. 

20.BufferedInputStream bis = newBufferedInputStream(zipFile.getInputStream(zipEntry));

21. 

22.int size;

23.byte[] buffer = new byte[2048];

24. 

25.FileOutputStream fos = newFileOutputStream(zipEntry.getName());

26.BufferedOutputStream bos = newBufferedOutputStream(fos, buffer.length);

27. 

28.while((size = bis.read(buffer, 0, buffer.length)) != -1) {

29.bos.write(buffer, 0, size);

30.}

31. 

32.bos.flush();

33.bos.close();

34.fos.close();

35. 

36.bis.close();

37.}

38.} catch (IOException e) {

39.e.printStackTrace();

40.}

41.}

42.}