spirngboot使用netty实现UDP协议接收数据

compile group: 'io.netty', name: 'netty-all', version: '4.1.42.Final'

　

package com.test.udp;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioDatagramChannel;


public class NettyServer {
    private final int port;

    public NettyServer(int port) {
        this.port = port;
    }

    public void start() throws Exception {
        EventLoopGroup bossGroup=new NioEventLoopGroup();
        try {
            //通过NioDatagramChannel创建Channel，并设置Socket参数支持广播
            //UDP相对于TCP不需要在客户端和服务端建立实际的连接，因此不需要为连接（ChannelPipeline）设置handler
            Bootstrap b=new Bootstrap();
            b.group(bossGroup)
                    .channel(NioDatagramChannel.class)
                    .option(ChannelOption.SO_BROADCAST, true)
                    .handler(new ServerHandler());
            b.bind(port).sync().channel().closeFuture().await();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally{
            bossGroup.shutdownGracefully();
        }
    }

}

　启动类

public class ThumbnailServiceApplication {

	public static void main(String[] args) throws Exception {
		SpringApplication.run(ThumbnailServiceApplication.class, args);
		new NettyServer(12345).start();

	}

}