SpringBoot整合Netty实现WebSocket
JAVA·D·WangJing 人气:3一、pom.xml依赖配置
<!-- netty --> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.1.50.Final</version> </dependency>
二、代码
2.1、NettyServer 类
package com.wangjing.socket.server; import com.wangjing.socket.handler.CoordinationSocketHandler; import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelOption; 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.http.HttpObjectAggregator; import io.netty.handler.codec.http.HttpServerCodec; import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler; import io.netty.handler.stream.ChunkedWriteHandler; public class CoordinationNettyServer { private final int port; public CoordinationNettyServer(int port) { this.port = port; } public void start() throws Exception { EventLoopGroup bossGroup = new NioEventLoopGroup(); EventLoopGroup group = new NioEventLoopGroup(); try { ServerBootstrap sb = new ServerBootstrap(); sb.option(ChannelOption.SO_BACKLOG, 1024); sb.group(group, bossGroup) // 绑定线程池 .channel(NioServerSocketChannel.class) // 指定使用的channel .localAddress(this.port)// 绑定监听端口 .childHandler(new ChannelInitializer<SocketChannel>() { // 绑定客户端连接时候触发操作 @Override protected void initChannel(SocketChannel ch) throws Exception { //websocket协议本身是基于http协议的,所以这边也要使用http解编码器 ch.pipeline().addLast(new HttpServerCodec()); //以块的方式来写的处理器 ch.pipeline().addLast(new ChunkedWriteHandler()); ch.pipeline().addLast(new HttpObjectAggregator(8192)); ch.pipeline().addLast(new WebSocketServerProtocolHandler("/ws", "WebSocket", true, 65536 * 10)); ch.pipeline().addLast(new CoordinationSocketHandler());//自定义消息处理类 } }); ChannelFuture cf = sb.bind().sync(); // 服务器异步创建绑定 System.out.println(CoordinationNettyServer.class + "已启动,正在监听: " + cf.channel().localAddress()); cf.channel().closeFuture().sync(); // 关闭服务器通道 } finally { group.shutdownGracefully().sync(); // 释放线程池资源 bossGroup.shutdownGracefully().sync(); } } }
2.2、SocketHandler 类
package com.wangjing.socket.handler; import com.wangjing.socket.pool.CoordinationChannelHandlerPool; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.SimpleChannelInboundHandler; import io.netty.handler.codec.http.websocketx.TextWebSocketFrame; public class CoordinationSocketHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> { @Override public void channelActive(ChannelHandlerContext ctx) throws Exception { System.out.println("与客户端建立连接,通道开启!"); //添加到channelGroup通道组 CoordinationChannelHandlerPool.channelGroup.add(ctx.channel()); } @Override public void channelInactive(ChannelHandlerContext ctx) throws Exception { System.out.println("与客户端断开连接,通道关闭!"); //从channelGroup通道组删除 CoordinationChannelHandlerPool.channelGroup.remove(ctx.channel()); } @Override protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception { //接收的消息 System.out.println(String.format("收到客户端%s的数据:%s", ctx.channel().id(), msg.text())); // 单独发消息 // sendMessage(ctx); // 群发消息 sendAllMessage(); } private void sendMessage(ChannelHandlerContext ctx) throws InterruptedException { String message = "我是服务器,你好呀"; ctx.writeAndFlush(new TextWebSocketFrame("hello")); } private void sendAllMessage() { String message = "我是服务器,这是群发消息"; CoordinationChannelHandlerPool.channelGroup.writeAndFlush(new TextWebSocketFrame(message)); } }
2.3、ChannelHandlerPool 类
package com.wangjing.socket.pool; import io.netty.channel.group.ChannelGroup; import io.netty.channel.group.DefaultChannelGroup; import io.netty.util.concurrent.GlobalEventExecutor; public class CoordinationChannelHandlerPool { public CoordinationChannelHandlerPool() { } //可以存储userId与ChannelId的映射表 // public static ConcurrentHashMap<String, ChannelId> channelIdMap = new ConcurrentHashMap<>(); //channelGroup通道组 public static ChannelGroup channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE); }
2.4、Application启动类
package com.wangjing.socket; import com.wangjing.socket.server.CoordinationNettyServer; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication(scanBasePackages = "com.wangjing") public class SocketApplication { public static void main(String[] args) { SpringApplication.run(SocketApplication.class, args); try { new CoordinationNettyServer(8804).start(); } catch (Exception e) { System.out.println("NettyServerError:" + e.getMessage()); } } }
三、测试
websocket 在线测试推荐:在线websocket测试-online tool-postjson
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