BotServer

java
package org.example.demo2.server;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
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 BotServer {

    private final int port;

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

    public void start() throws InterruptedException {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ChannelPipeline p = ch.pipeline();
                            p.addLast(new StringDecoder());
                            p.addLast(new StringEncoder());
                            p.addLast(new BotServerHandler());
                        }
                    });

            ChannelFuture f = b.bind(port).sync();
            System.out.println("BotServer started on port " + port);

            f.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        int port = 8080;
        new BotServer(port).start();
    }
}




package org.example.demo2.server;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class BotServerHandler extends SimpleChannelInboundHandler<String> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception {
        String response;
        switch (msg.trim()) {
            case "现在几点了？":
                response = "现在是：" + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
                break;
            case "你叫什么名字？":
                response = "我叫 BotServer";
                break;
            case "今天过的开心吗？":
                response = "我是一个机器人，没有情感，所以无所谓开心不开心";
                break;
            default:
                response = "我不明白你的问题";
                break;
        }
        ctx.writeAndFlush(response);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}

BotClinet

java
package org.example.demo2.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

import java.util.Scanner;

public class BotClient {

    private final String host;
    private final int port;

    public BotClient(String host, int port) {
        this.host = host;
        this.port = port;
    }

    public void start() throws InterruptedException {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(group)
                    .channel(NioSocketChannel.class)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ChannelPipeline p = ch.pipeline();
                            p.addLast(new StringDecoder());
                            p.addLast(new StringEncoder());
                            p.addLast(new BotClientHandler());
                        }
                    });

            ChannelFuture f = b.connect(host, port).sync();
            System.out.println("BotClient connected to " + host + ":" + port);

            Channel channel = f.channel();
            Scanner scanner = new Scanner(System.in);
            while (true) {
                System.out.print("Enter message: ");
                String message = scanner.nextLine();
                if ("exit".equalsIgnoreCase(message)) {
                    break;
                }
                channel.writeAndFlush(message);
            }

            channel.closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        String host = "localhost";
        int port = 8080;
        new BotClient(host, port).start();
    }
}


package org.example.demo2.client;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

public class BotClientHandler extends SimpleChannelInboundHandler<String> {


    @Override
    protected void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception {
        System.out.println("Server response: " + msg);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}