Vue+Java 通过websocket实现服务器与客户端双向通信操作

 methods: { //在方法里调用 this.websocketsend()发送数据给服务器 onConfirm () { //需要传输的数据 let data = { code: 1, item: ‘传输的数据' } this.websocketsend(JSON.stringify(data)) }, /* */ initWebSocket () { // 初始化weosocket let userinfo = getUserInfo() let username = userinfo.waiter_userid this.websock = new WebSocket('ws://' + baseURL + '/websocket/' + username) this.websock.onmessage = this.websocketonmessage this.websock.onerror = this.websocketonerror this.websock.onopen = this.websocketonopen this.websock.onclose = this.websocketclose }, websocketonopen () { // 连接建立之后执行send方法发送数据 let data = { code: 0, msg: '这是client：初次连接' } this.websocketsend(JSON.stringify(data)) }, websocketonerror () { console.log( 'WebSocket连接失败') }, websocketonmessage (e) { // 数据接收 console.log('数据接收' + e.data) }, websocketsend (Data) { // 数据发送 this.websock.send(Data) }, websocketclose (e) { // 关闭 console.log('已关闭连接', e) } }, created () { console.log('created') this.initWebSocket() }, data () { return { websocket: null } }, destroyed () { this.websock.close() // 离开路由之后断开websocket连接 } 

 package diancan.servlet; import java.io.IOException; import java.<em>本文来源gao.dai.ma.com搞@代*码(网$</em>util.Map; import java.util.concurrent.ConcurrentHashMap; import javax.websocket.OnClose; import javax.websocket.OnError; import javax.websocket.OnMessage; import javax.websocket.OnOpen; import javax.websocket.Session; import javax.websocket.server.PathParam; import javax.websocket.server.ServerEndpoint; @ServerEndpoint("/websocket/{username}") public class WebSocket { private static int onlineCount = 0; private static Map clients = new ConcurrentHashMap(); private Session session; private String username; @OnOpen public void onOpen(@PathParam("username") String username, Session session) throws IOException { this.username = username; this.session = session; addOnlineCount(); clients.put(username, this); System.out.println("已连接" + username); } @OnClose public void onClose() throws IOException { clients.remove(username); subOnlineCount(); } @OnMessage public void onMessage(String message) throws IOException { DataWrapper res = new DataWrapper(); System.out.println("message:" + message); JSONObject req = JSONObject.parseObject(message); // System.out.println("item:" + req.getJSONObject("item")); // System.out.println("item:" + req.getInteger("code")); // 发送数据给服务端 sendMessageAll(JSON.toJSONString(res)); } @OnError public void onError(Session session, Throwable error) { error.printStackTrace(); } public void sendMessageTo(String message, String To) throws IOException { // session.getBasicRemote().sendText(message); // session.getAsyncRemote().sendText(message); for (WebSocket item : clients.values()) { if (item.username.equals(To)) item.session.getAsyncRemote().sendText(message); } } public void sendMessageAll(String message) throws IOException { for (WebSocket item : clients.values()) { item.session.getAsyncRemote().sendText(message); } } public static synchronized int getOnlineCount() { return onlineCount; } public static synchronized void addOnlineCount() { WebSocket.onlineCount++; } public static synchronized void subOnlineCount() { WebSocket.onlineCount--; } public static synchronized Map getClients() { return clients; } }