netty 整合mybatis-plus

Net 是一款高性能的网络通信框架，MyBatis-Plus 是 MyBatis 的增强工具，在实现数据访问时提供了更加便捷的 API。将它们整合起来可以实现一个高性能的网络通信应用。

下面是整合步骤：

1. 引入 Netty 和 MyBatis-Plus 的依赖：

<!-- Netty -->
<dependency>
    <groupId>io.netty</groupId>
    <artifactId>netty-all</artifactId>
    <version>${netty.version}</version>
</dependency>

<!-- MyBatis-Plus -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>${mybatis-plus.version}</version>
</dependency>

2. 编写 Netty 的服务端代码，实现业务逻辑处理：

public class MyNettyServer {

    private static final int PORT = 8888;

    public void start() {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group(bossGroup, workerGroup)
                     .channel(NioServerSocketChannel.class)
                     .childHandler(new ChannelInitializer<SocketChannel>() {
                         @Override
                         protected void initChannel(SocketChannel ch) throws Exception {
                             ch.pipeline().addLast(new MyNettyServerHandler());
                         }
                     });
            ChannelFuture future = bootstrap.bind(PORT).sync();
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

}

3. 编写 Netty 的处理器 MyNettyServerHandler，实现业务逻辑：

public class MyNettyServerHandler extends ChannelInboundHandlerAdapter {

    @Autowired
    private UserService userService;

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf byteBuf = (ByteBuf) msg;
        String request = byteBuf.toString(CharsetUtil.UTF_8);
        String response = userService.getUser(request);
        ByteBuf responseBuf = Unpooled.copiedBuffer(response, CharsetUtil.UTF_8);
        ctx.writeAndFlush(responseBuf);
    }

}

4. 编写 MyBatis-Plus 的服务：

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Override
    public String getUser(String name) {
        User user = getOne(new LambdaQueryWrapper<User>().eq(User::getName, name));
        return user == null ? "User not found" : user.toString();
    }

}

5. 在 Spring Boot 中整合 Netty 和 MyBatis-Plus：

@SpringBootApplication
public class MyApplication implements CommandLineRunner {

    @Autowired
    private MyNettyServer myNettyServer;

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        myNettyServer.start();
    }

}

至此，Netty 和 MyBatis-Plus 的整合就完成了，可以在 Netty 的处理器中调用 MyBatis-Plus 的服务实现业务逻辑。