ZIP形式でファイルを圧縮する方法

package com.mkyong.zip;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class App
{
    public static void main( String[]args )
    {
        byte[]buffer = new byte[1024];

        try{

            FileOutputStream fos = new FileOutputStream("C:\\MyFile.zip");
            ZipOutputStream zos = new ZipOutputStream(fos);
            ZipEntry ze= new ZipEntry("spy.log");
            zos.putNextEntry(ze);
            FileInputStream in = new FileInputStream("C:\\spy.log");

            int len;
            while ((len = in.read(buffer)) > 0) {
                zos.write(buffer, 0, len);
            }

            in.close();
            zos.closeEntry();

           //remember close it
            zos.close();

            System.out.println("Done");

        }catch(IOException ex){
           ex.printStackTrace();
        }
    }
}

package com.mkyong.zip;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class AppZip
{
    List<String> fileList;
    private static final String OUTPUT__ZIP__FILE = "C:\\MyFile.zip";
    private static final String SOURCE__FOLDER = "C:\\testzip";

    AppZip(){
    fileList = new ArrayList<String>();
    }

    public static void main( String[]args )
    {
        AppZip appZip = new AppZip();
        appZip.generateFileList(new File(SOURCE__FOLDER));
        appZip.zipIt(OUTPUT__ZIP__FILE);
    }

   /** **
     **  Zip it
     **  @param zipFile output ZIP file location
     ** /    public void zipIt(String zipFile){

     byte[]buffer = new byte[1024];

     try{

        FileOutputStream fos = new FileOutputStream(zipFile);
        ZipOutputStream zos = new ZipOutputStream(fos);

        System.out.println("Output to Zip : " + zipFile);

        for(String file : this.fileList){

            System.out.println("File Added : " + file);
            ZipEntry ze= new ZipEntry(file);
            zos.putNextEntry(ze);

            FileInputStream in =
                       new FileInputStream(SOURCE__FOLDER + File.separator + file);

            int len;
            while ((len = in.read(buffer)) > 0) {
                zos.write(buffer, 0, len);
            }

            in.close();
        }

        zos.closeEntry();
       //remember close it
        zos.close();

        System.out.println("Done");
    }catch(IOException ex){
       ex.printStackTrace();
    }
   }

   /** **
     **  Traverse a directory and get all files,
     **  and add the file into fileList
     **  @param node file or directory
     ** /    public void generateFileList(File node){

       //add file only
    if(node.isFile()){
        fileList.add(generateZipEntry(node.getAbsoluteFile().toString()));
    }

    if(node.isDirectory()){
        String[]subNote = node.list();
        for(String filename : subNote){
            generateFileList(new File(node, filename));
        }
    }

    }

   /** **
     **  Format the file path for zip
     **  @param file file path
     **  @return Formatted file path
     ** /    private String generateZipEntry(String file){
        return file.substring(SOURCE__FOLDER.length()+1, file.length());
    }
}

Output to Zip : C:\MyFile.zip
File Added : pdf\Java-Interview.pdf
File Added : spy\log\spy.log
File Added : utf-encoded.txt
File Added : utf.txt
Done