?Netty 是一个基于 JAVA NIO 类库的异步通信框架，它的架构特点是：异步非阻塞、基于事件驱动、高性能、高可靠性和高可定制性。

netty服务端

public class NettyServer {

	public static void main(String[] args) {
		// 1.创建服务对象
		ServerBootstrap serverBootstrap = new ServerBootstrap();
		// 2.创建两个线程池 第一个 监听端口号 nio监听
		ExecutorService boos = Executors.newCachedThreadPool();
		ExecutorService wook = Executors.newCachedThreadPool();
		// 3.将线程池放入工厂
		serverBootstrap.setFactory(new NioServerSocketChannelFactory(boos, wook));
		// 4.设置管道工厂
		serverBootstrap.setPipelineFactory(new ChannelPipelineFactory() {
			// 设置管道
			public ChannelPipeline getPipeline() throws Exception {
				ChannelPipeline pipeline = org.jboss.netty.channel.Channels.pipeline();
				// 传输数据的时候直接为string类型
				pipeline.addLast("decoder", new StringDecoder());
				pipeline.addLast("encoder", new StringEncoder());
				// 设置事件监听类
				pipeline.addLast("serverHanlder", new ServerHanlder());
				return pipeline;

			}
		});
		// 绑定端口号
		serverBootstrap.bind(new InetSocketAddress(8080));
		System.out.println("服务器端已经被启动.....");
	}

}

netty客户端

public class NettyClinent {
	public static void main(String[] args) {
		// 1.创建服务对象
		ClientBootstrap clientBootstrap = new ClientBootstrap();
		// 2.创建两个线程池 第一个 监听端口号 nio监听
		ExecutorService boos = Executors.newCachedThreadPool();
		ExecutorService wook = Executors.newCachedThreadPool();
		// 3.将线程池放入工厂
		clientBootstrap.setFactory(new NioClientSocketChannelFactory(boos, wook));
		// 4.设置管道工厂
		clientBootstrap.setPipelineFactory(new ChannelPipelineFactory() {
			// 设置管道
			public ChannelPipeline getPipeline() throws Exception {
				ChannelPipeline pipeline = org.jboss.netty.channel.Channels.pipeline();
				// 传输数据的时候直接为string类型
				pipeline.addLast("decoder", new StringDecoder());
				pipeline.addLast("encoder", new StringEncoder());
				// 设置事件监听类
				pipeline.addLast("clientHanlder", new ClientHanlder());
				return pipeline;

			}
		});
		// 绑定端口号
		ChannelFuture connect = clientBootstrap.connect(new InetSocketAddress("127.0.0.1", 8080));
		Channel channel = connect.getChannel();
		System.out.println("client start");
		Scanner scanner = new Scanner(System.in);
        while (true) {
        	System.out.println("请输入内容:");
        	channel.write(scanner.next());
			
		}
	}
}

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