Netty权威指南之Netty入门程序

package com.hjp.netty.netty;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class TimeServer {

    public void bind(int port) throws Exception {
        //配置服务端的线程组，两个线程组，一个用于服务端接收客户端连接，另一个进行SocketChannel的网络读写
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            //ServerBootstrap用于启动NIO服务端的辅助启动类，目的是降低服务端开发复杂度
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 1024)
                    .childHandler(new ChildChannelHandler());
            //绑定端口，同步等待成功
            ChannelFuture future=bootstrap.bind(port).sync();

            //等待服务端监听端口关闭
            future.channel().closeFuture().sync();
        }finally {
            //优雅退出，释放线程资源
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    private class ChildChannelHandler extends ChannelInitializer<SocketChannel>{

        protected void initChannel(SocketChannel socketChannel) throws Exception {
            socketChannel.pipeline().addLast(new TimeServerHandler());
        }
    }

    public static void main(String[] args)throws Exception{
        int port=8080;
        if(args!=null&&args.length>0){
            try {
                port=Integer.valueOf(args[0]);
            }catch (NumberFormatException e){

            }
        }
        new TimeServer().bind(port);
    }

}

TimeServer