Archive:  t.zip
  Length     Date   Time    Name
 --------        ----      ----      ----
        9  04-11-09 09:11   t.txt
        0  04-11-09 09:12   t/
      15  04-11-09 09:12   t/t2.txt
 --------                           -------
       24                          3 files

public class Test {
    public static void main(String[] args) {
    	try {
    		FileOutputStream f = new FileOutputStream("test.zip");
    		ZipOutputStream zip = new ZipOutputStream(new BufferedOutputStream(f));
    		zip.putNextEntry(new ZipEntry("xml/"));
    		zip.putNextEntry(new ZipEntry("xml/xml"));
    		zip.close();
    	} catch(Exception e) {
    		System.out.println(e.getMessage());
    	}
    }
}

public class ZipUsingJavaUtil
{
     /*
     * Zip function zip all files and folders
     */
   @Override
   @SuppressWarnings("finally")
   public boolean zipFiles(String srcFolder, String destZipFile)
  {
      boolean result=false;
      try
      {
          System.out.println("Program Start zipping the given files");
          /*
           * send to the zip procedure
           */
          zipFolder(srcFolder,destZipFile);
          result=true;
          System.out.println("Given files are successfully zipped");
      }
      catch(Exception e)
      {
          System.out.println("Some Errors happned during the zip process");
      }
      finally
      {
          return result;
      }
  }
  /*
   * zip the folders
   */
  private void zipFolder(String srcFolder, String destZipFile) throws Exception
  {
    ZipOutputStream zip = null;
    FileOutputStream fileWriter = null;
    /*
     * create the output stream to zip file result
     */
    fileWriter = new FileOutputStream(destZipFile);
    zip = new ZipOutputStream(fileWriter);
    /*
     * add the folder to the zip
     */
    addFolderToZip("", srcFolder, zip);
    /*
     * close the zip objects
     */
    zip.flush();
    zip.close();
  }
  /*
   * recursively add files to the zip files
   */
  private void addFileToZip(String path, String srcFile, ZipOutputStream zip,boolean flag)throws Exception
  {
     /*
      * create the file object for inputs
      */
    File folder = new File(srcFile);

    /*
     * if the folder is empty add empty folder to the Zip file
     */
    if (flag==true)
    {
        zip.putNextEntry(new ZipEntry(path + "/" +folder.getName() + "/"));
    }
    else
    {     /*
         * if the current name is directory, recursively traverse it to get the files
         */
        if (folder.isDirectory() )
        {
            /*
             * if folder is not empty
             */
            addFolderToZip(path, srcFile, zip);
        }
        else
        {
           /*
            * write the file to the output
           */
           byte[] buf = new byte[1024];
           int len;
           FileInputStream in = new FileInputStream(srcFile);
           zip.putNextEntry(new ZipEntry(path + "/" + folder.getName()));
           while ((len = in.read(buf)) > 0)
            {
              /*
               * Write the Result
              */
              zip.write(buf, 0, len);
            }
        }
    }
  }
/*
 * add folder to the zip file
 */
 private void addFolderToZip(String path, String srcFolder, ZipOutputStream zip)
      throws Exception
 {
    File folder = new File(srcFolder);

    /*
     * check the empty folder
     */
    if (folder.list().length == 0)
    {
         System.out.println(folder.getName());
         addFileToZip(path , srcFolder, zip,true);
    }
    else
    {
        /*
         * list the files in the folder
         */
        for (String fileName : folder.list())
        {
          if (path.equals(""))
          {
            addFileToZip(folder.getName(), srcFolder + "/" + fileName, zip,false);
          }
          else
             {
                 addFileToZip(path + "/" + folder.getName(), srcFolder + "/" + fileName, zip,false);
             }
       }
   }
  }