import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

import java.util.zip.ZipOutputStream;

public class zipDemo {

    public static void main(String[] args)  {

     try {

        //zipFolder("/home/hadoop/test";);

        unzip("/home/hadoop/mytest/test.zip","/home/hadoop/mytest/");

    } catch (IOException e) {

        e.printStackTrace();

    }

    }

    static void zipFolder(String _path) throws IOException

    {

        Path path = Paths.get(_path);

        String target = "/home/hadoop/mytest/test.zip";

        //String target = path.getParent() +"/" + path.getFileName() +".zip";

        /*

         System.out.println(path.getFileName());

         System.out.println(path.getRoot());

         System.out.println(path.getParent());System.out.println(target);

        */

         ZipOutputStream zo = new ZipOutputStream(new FileOutputStream(target));

         zipFile(zo,path,"");

         zo.close();

    }

    static void zipFile(ZipOutputStream zo,Path _path,String parentpath) throws IOException

    {

        File _file = _path.toFile();

        if(_file.isFile())

        {

            byte[] buff = new byte[1024];

            FileInputStream fi = new FileInputStream(_file);

            int len;

            zo.putNextEntry(new ZipEntry(parentpath +"/" + _file.getName()));

            while((len=fi.read(buff))>0)

                zo.write(buff, 0, len);

            zo.closeEntry();

            fi.close();

        }

        if(_file.isDirectory())

        {

            if(_file.listFiles().length==0)

            {

                zo.putNextEntry(new ZipEntry(parentpath.equals("")?_file.getName():parentpath + "/" + _file.getName() + "/"));

            }

            for(File __file : _file.listFiles())

                zipFile(zo,__file.toPath(),parentpath.equals("")?_file.getName():parentpath+ "/" + _file.getName());

        }

    }

    static void unzip(String path,String target) throws IOException

    {

        File targetfolder = new File(target);

        ZipInputStream zi = new ZipInputStream(new FileInputStream(path));

        ZipEntry ze = null;

        FileOutputStream fo = null;

        byte[] buff = new byte[1024];

        int len;

        while((ze =  zi.getNextEntry())!=null)

        {

            File _file = new File(targetfolder,ze.getName());

            if(!_file.getParentFile().exists()) _file.getParentFile().mkdirs();

            if(ze.isDirectory())

            {

                _file.mkdir();

            }

            else //file

            {

                fo = new FileOutputStream(_file);

                while((len=zi.read(buff))>0) fo.write(buff, 0, len);

                fo.close();

            }

            zi.closeEntry();

        }

        zi.close();

    }

}