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Netty4服务端入门代码示例
阅读量:348 次
发布时间:2019-03-04

本文共 2397 字,大约阅读时间需要 7 分钟。

添加Maven依赖

io.netty
netty-all
4.1.36.Final

代码示例:

import io.netty.bootstrap.ServerBootstrap;import io.netty.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 hanlder",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()); //super.channelActive(ctx); } public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { System.out.println("read msg : "+msg); String resp = "Hello world"; ctx.channel().writeAndFlush(resp); } }}

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