//springboot（version2.0.2）整合netty（version4.1.25）搭建的websocket服務端，握手阻塞，握手成功(handlerAdded調(diào)用)但是未返回握手成功信息給前端， //前端websocket握手阻塞，連接超時 @Component public?class?NettySocket?{ ????private?static?class?SingletionSocketServer?{ ????????static?final?NettySocket?INSTANCE?=?new?NettySocket(); ????} ????public?static?NettySocket?getInstance()?{ ????????return?SingletionSocketServer.INSTANCE; ????} ????private?EventLoopGroup?parentGroup; ????private?EventLoopGroup?childGroup; ????private?ServerBootstrap?serverBootstrap; ????private?ChannelFuture?future; ????public?NettySocket()?{ ????????parentGroup?=?new?NioEventLoopGroup(); ????????childGroup?=?new?NioEventLoopGroup(); ????????serverBootstrap?=?new?ServerBootstrap(); ????????serverBootstrap.group(parentGroup,?childGroup).channel(NioServerSocketChannel.class).childHandler(new?NettySocketInitializer()); ????} ????public?void?start()?{ ????????this.future?=?serverBootstrap.bind(8065); ????????System.out.println("netty?WebSocket?start?ok"); ????} }初始化器public?class?NettySocketInitializer?extends?ChannelInitializer<SocketChannel>?{ ????@Override ????protected?void?initChannel(SocketChannel?ch)?{ ????????ChannelPipeline?channelPipeline?=?ch.pipeline(); ????????////////////////http協(xié)議的支持????/////////////// ????????//Http編解碼器 ????????channelPipeline.addLast(new?HttpServerCodec()); ????????//對寫大數(shù)據(jù)流的支持 ????????channelPipeline.addLast(new?ChunkedWriteHandler()); ????????//Http對象聚合器，，參數(shù)：消息的最大長度 ????????//幾乎在Netty中的編程都會使用到這個handler ????????channelPipeline.addLast(new?HttpObjectAggregator(1024?*?64)); ????????////////////////http協(xié)議的支持?END/////////////// ????????channelPipeline.addLast(new?WebSocketServerProtocolHandler("/nt-ws")); ????????channelPipeline.addLast(new?ChatHandler()); ????} }消息處理@Slf4j public?class?ChatHandler?extends?SimpleChannelInboundHandler<TextWebSocketFrame>?{ ????/** ?????*?記錄和管理所有客戶端 ?????*/ ????private?static?ChannelGroup?clients?=?new?DefaultChannelGroup(GlobalEventExecutor.INSTANCE); ????@Override ????protected?void?channelRead0(ChannelHandlerContext?ctx,?TextWebSocketFrame?msg)?throws?Exception?{ ????????String?content?=?msg.text(); ????????log.info("accept:?{}",?content); ????????for?(Channel?channel?:?clients)?{ ????????????channel.writeAndFlush(new?TextWebSocketFrame("服務器消息["?+?ctx.channel().id().asLongText()?+?"]:?"?+?content)); ????????} //????????????clients.writeAndFlush(new?TextWebSocketFrame("服務器消息["?+?ctx.channel().id().asLongText()?+?"]:?"?+?content)); ????} ????@Override ????public?void?handlerAdded(ChannelHandlerContext?ctx)?throws?Exception?{ ????????clients.add(ctx.channel()); ????????log.info("客戶端連接??——???channel?id?:?{}",?ctx.channel().id().asLongText()); ????????log.info("剩余客戶端：{}",?clients.size()); //????????????ctx.channel().writeAndFlush(new?TextWebSocketFrame("連接成功！當前在線人數(shù)："?+?clients.size())); ????} ????@Override ????public?void?handlerRemoved(ChannelHandlerContext?ctx)?throws?Exception?{ ????????//觸發(fā)該方法ChannelGroup會自動移除對應客戶端的channel，所以不需要專門移除 //????????????clients.remove(ctx.channel()); ????????log.info("客戶端連接斷開??——???channel?id?:?{}",?ctx.channel().id().asLongText()); ????????log.info("剩余客戶端：{}",?clients.size()); ????} ????@Override ????public?void?exceptionCaught(ChannelHandlerContext?ctx,?Throwable?cause)?throws?Exception?{ ????????cause.printStackTrace(); ????????//?發(fā)生異常之后關(guān)閉連接（關(guān)閉channel），隨后從ChannelGroup中移除 ????????ctx.channel().close(); ????????clients.remove(ctx.channel()); ????} }Booter啟動類@Component public?class?NettyBooter?implements?ApplicationListener<ContextRefreshedEvent>?{ ????@Override ????public?void?onApplicationEvent(ContextRefreshedEvent?event)?{ ????????if?(event.getApplicationContext().getParent()?==?null)?{ ????????????try?{ ????????????????NettySocket.getInstance().start(); ????????????}?catch?(Exception?e)?{ ????????????????e.printStackTrace(); ????????????} ????????} ????} }