java zip 压缩文件

zip压缩：ZipOutputStream、ZipFile、ZipInputStream 三个类的作用

一段 java zip 压缩的代码：

                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();