java zip 压缩文件

                File dir = new File("C:\\Users\\Administrator\\Desktop\\zipsource");

		String zipFile = "C:\\Users\\Administrator\\Desktop\\test2.zip";

		OutputStream outputStream = new FileOutputStream(new File(zipFile));

		ZipOutputStream zipOutputStream = new ZipOutputStream(outputStream);

		byte[] buffer = new byte[1024];

		int len  = 0;

		if( dir.isDirectory() ) {

			 File[]  files = dir.listFiles();

			for(File fileItem  :files) {

				FileInputStream fileItemInputStream = new FileInputStream( fileItem );

				ZipEntry zipEntry = new ZipEntry( fileItem.getName() );

				zipOutputStream.putNextEntry( zipEntry );

				while( (len = IOUtils.read(fileItemInputStream, buffer)) != 0 ) {

					zipOutputStream.write( buffer,0,len );

				}

				fileItemInputStream.close();

			}

		}

		zipOutputStream.flush();

		zipOutputStream.close();