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??Maven?????Netty???

??????Netty??????Netty???????????????????pom.xml??????????????????Netty??????

?????

import io.netty.bootstrap.ServerBootstrap;import io.netty.channel.Channel;import io.netty.channel.nio.NioEventLoopGroup;import io.netty.channel.socket.SocketChannel;import io.netty.channel.socket.nio.NioServerSocketChannel;import io.netty.handler.codec.string.StringDecoder;import io.netty.handler.codec.string.StringEncoder;public class NetttyServer {    public static void main(String[] args) {        EventLoopGroup boss = new NioEventLoopGroup();        EventLoopGroup worker = new NioEventLoopGroup();        ServerBootstrap bootstrap = new ServerBootstrap();        bootstrap.group(boss, worker)                .channel(NioServerSocketChannel.class)                .childHandler(new ChannelInitializer
   
    () {                    @Override                    protected void initChannel(SocketChannel socketChannel) throws Exception {                        socketChannel.pipeline()                                .addLast("encoder", new StringEncoder())                                .addLast("decoder", new StringDecoder())                                .addLast("hello world handler", new HelloWorldHandler());                    }                });        try {            ChannelFuture channelFuture = bootstrap.bind(8080).sync();            channelFuture.channel().closeFuture().sync();        } catch (InterruptedException e) {            e.printStackTrace();        } finally {            boss.shutdownGracefully();            worker.shutdownGracefully();        }    }    static class HelloWorldHandler extends ChannelInboundHandlerAdapter {        @Override        public void channelActive(ChannelHandlerContext ctx) throws Exception {            System.out.println("channel Active and write back......");            String resp = "Hello world";            ChannelFuture future = ctx.channel().writeAndFlush(resp);            future.sync();            System.out.println("success:" + future.isSuccess());        }        @Override        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {            System.out.println("read msg : " + msg);            String resp = "Hello world";            ctx.channel().writeAndFlush(resp);        }    }}
   

?????????Netty????????????????????????

       
    
     io.netty
        
    
     netty-all
        
    
     4.1.36.Final
    
   

??????????????????????NioEventLoopGroup??????????NioServerSocketChannel??????????Pipeline????????????????????HelloWorldHandler??????

?????????????????????8080????????????????????????????"Hello world"???????????????????????

???????????????????Netty????????????????

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