利用spring boot+WebSocket实现后台主动消息推送功能

     org.springframework.bootspring-boot-starter-websocket

@Configuration public class WebSocketConfig { @Bean public ServerEndpointExporter serverEndpointExporter() { return new ServerEndpointExporter(); } } 

package com.star.manager.service; import java.io.IOException; import java.util.concurrent.CopyOnWriteArraySet; import javax.websocket.OnClose; import javax.websocket.OnError; import javax.websocket.OnMessage; import javax.websocket.OnOpen; import javax.websocket.Session; import javax.websocket.server.ServerEndpoint; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Component; @Slf4j //@ServerEndpoint("/websocket/{user}") @ServerEndpoint(value = "/websocket") @Component public class WebSocketServer { //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。 private static int onlineCount = 0; //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。 private static CopyOnWriteArraySet webSocketSet = new CopyOnWriteArraySet(); //与某个客户端的连接会话，需要通过它来给客户端发送数据 private Session session; /** * 连接建立成功调用的方法*/ @OnOpen public void onOpen(Session session) { this.session = session; webSocketSet.add(this);     //加入set中 addOnlineCount();           //在线数加1 log.info("有新连接加入！当前在线人数为" + getOnlineCount()); try { sendMessage("连接成功"); } catch (IOException e) { log.error("websocket IO异常"); } } //    //连接打开时执行 //    @OnOpen //    public void onOpen(@PathParam("user") String user, Session session) { //        currentUser = user; //        System.out.println("Connected ... " + session.getId()); //    } /** * 连接关闭调用的方法 */ @OnClose public void onClose() { webSocketSet.remove(this);  //从set中删除 subOnlineCount();           //在线数减1 log.info("有一连接关闭！当前在线人数为" + getOnlineCount()); } /** * 收到客户端消息后调用的方法 * * @param message 客户端发送过来的消息*/ @OnMessage public void onMessage(String message, Session session) { log.info("来自客户端的消息:" + message); //群发消息 for (WebSocketServer item : webSocketSet) { try { item.sendMessage(message); } catch (IOException e) { e.printStackTrace(); } } } /** * * @param session * @param error */ @OnError public void onError(Session session, Throwable error) { log.error("发生错误"); error.printStackTrace(); } public void sendMessage(String message) throws IOException { this.session.getBasicRemote().sendText(message); } /** * 群发自定义消息 * */ public static void sendInfo(String message) throws IOException { log.info(message); for (WebSocketServer item : webSocketSet) { try { item.sendMessage(message); } catch (IOException e) { continue; } } } public static synchronized int getOnlineCount() { return onlineCount; } public static synchronized void addOnlineCount() { WebSocketServer.onlineCount++; } public static synchronized void subOnlineCount() { WebSocketServer.onlineCount--; } } 

     @RequestMapping(value="/pushVideoListToWeb",method=RequestMethod.POST,consumes = "application/json") public @ResponseBody Map pushVideoListToWeb(@RequestBody Map param) { Map result =new HashMap(); try { WebSocketServer.sendInfo("有新客户呼入,sltAccountId:"+CommonUtils.getValue(param, "sltAccountId")); result.put("operationResult", true); }catch (IOException e) { result.put("operationResult", true); } return result; }

    public void sendMessage(String message) throws IOException { this.session.getBasicRemote().sendText(message); } 

//socket = new WebSocket("ws://localhost:9094/starManager/websocket/张三"); var socket; if(typeof(WebSocket) == "undefined") { console.log("您的浏览器不支持WebSocket"); }else{ console.log("您的浏览器支持WebSocket"); //实现化WebSocket对象，指定要连接的服务器地址与端口  建立连接 //socket = new WebSocket("ws://localhost:9094/starManager/websocket/张三") 

            socket = new WebSocket("ws://localhost:9094/starManager/websocket"); //打开事件 socket.onopen = function() { console.log("Socket 已打开"); //socket.send("这是来自客户端的消息" + location.href + new Date()); }; //获得消息事件 socket.onmessage = function(msg) { console.log(msg.data); //发现消息进入    调后台获取 getCallingList(); }; //关闭事件 socket.onclose = function() { console.log("Socket已关闭"); }; //发生了错误事件 socket.onerror = function() { alert("Socket发生了错误"); } $(window).unload(function(){ socket.close(); }); //                                    $("#btnSend").click(function() { //                                        socket.send("这是来自客户端的消息" + location.href + new Date()); //                                    }); // //                                    $("#btnClose").click(function() { //                                        socket.close(); //                                    }); } 

socket = new WebSocket("ws://localhost:9094/starManager/websocket");