netty-socket客户端和服务端多次交互样例

        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-all</artifactId>
            <version>4.1.81.Final</version>
        </dependency>

客户端:

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;

@Slf4j
@Component
public class NettyClientServer {
   

    public void test(String aaa) {
   
        NioEventLoopGroup nioEventLoopGroup = null;
        try {
   
            nioEventLoopGroup = new NioEventLoopGroup();
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(nioEventLoopGroup)
                    .channel(NioSocketChannel.class)
                    .handler(new MyClientInitializer(aaa));
            ChannelFuture channelFuture = bootstrap.connect("X.X.X.X", 8080).sync();
            channelFuture.channel().closeFuture().sync();
        } catch (InterruptedException e) {
   
            e.printStackTrace();
        } finally {
   
            if (nioEventLoopGroup != null) {
   
                nioEventLoopGroup.shutdownGracefully();
            }
        }
    }
}

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty