springboot+netty实现UDP监听两个端口

在springboot工程中集成netty框架实现UDP通信，在CommandLineRunner的初始化启动时启动两个UDP监听服务。
实例如下
1、两个NettyUdpServer

@Slf4j
@Component
@EnableAsync
public class NettyUdpServer {

    @Autowired
    NettyServerHandlerInitializer nettyServerHandlerInitializer;

    @Async
    public void init(int port) {
        //表示服务器连接监听线程组，专门接受 accept 新的客户端client 连接
        EventLoopGroup bossLoopGroup = new NioEventLoopGroup();
        try {
            //1、创建netty bootstrap 启动类
            Bootstrap serverBootstrap = new Bootstrap();
            //2、设置boostrap 的eventLoopGroup线程组
            serverBootstrap.group(bossLoopGroup)
                    //3、设置NIO UDP连接通道
                    .channel(NioDatagramChannel.class)
                    // 设置 Netty Server 的端口
                    .localAddress(new InetSocketAddress(port))
                    //4、设置通道参数 SO_BROADCAST广播形式
                    .option(ChannelOption.SO_BROADCAST, true)
                    //5、设置处理类 装配流水线
                    .handler(nettyServerHandlerInitializer);
            //6、绑定server，通过调用sync（）方法异步阻塞，直到绑定成功
            ChannelFuture channelFuture = serverBootstrap.bind().sync();
            log.info("started and listened on " + channelFuture.channel().localAddress());
            //7、监听通道关闭事件，应用程序会一直等待，直到channel关闭
            channelFuture.channel().closeFuture().sync();
        } catch (Exception e) {
        } finally {
            log.info("netty udp close!", "info");
            //8 关闭EventLoopGroup，
            bossLoopGroup.shutdownGracefully();
        }
    }
}

@Slf4j
@Component
@EnableAsync
public class NettyUdpServer2 {