SpringBoot整合Netty(服务端)

下面是一个简单的Spring Boot整合Netty的例子，实现了一个基础的服务器端。

首先，添加Netty和Spring Boot的起步依赖到你的pom.xml文件中：

<dependencies>
    <!-- Spring Boot相关依赖 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
 
    <!-- Netty依赖 -->
    <dependency>
        <groupId>io.netty</groupId>
        <artifactId>netty-all</artifactId>
        <version>4.1.69.Final</version> <!-- 使用的Netty版本 -->
    </dependency>
</dependencies>

然后，创建一个Netty服务器的配置类：

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
 
@Configuration
public class NettyServerConfig {
 
    @Value("${netty.port}")
    private int port;
 
    @Bean(destroyMethod="shutdownGracefully")
    public EventLoopGroup bossGroup() {
        return new NioEventLoopGroup();
    }
 
    @Bean(destroyMethod="shutdownGracefully")
    public EventLoopGroup workerGroup() {
        return new NioEventLoopGroup();
    }
 
    @Bean
    public ServerBootstrap serverBootstrap(EventLoopGroup bossGroup, EventLoopGroup workerGroup) {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
         .channel(NioServerSocketChannel.class)
         .childHandler(new NettyServerInitializer()); // 自定义初始化处理器
        return b;
    }
 
    @Bean
    public ChannelFuture channelFuture(ServerBootstrap serverBootstrap) {
        ChannelFuture f = serverBootstrap.bind(port).sync();
        return f;
    }
}

创建一个Netty的初始化处理器：

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
 
public class NettyServerInitializer extends ChannelInitializer<SocketChannel> {
 
    @Override
    public void initChannel(SocketChannel ch) {
        ChannelPipeline pipeline = ch.pipeline();
        pipeline.addLast("decoder", new StringDecoder());
        pipeline.addLast("encoder", new StringEncoder());
        pipeline.addLas