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Springboot+Vue+Websocket

Springboot+Vue+Websocket

作者: Buckler | 来源:发表于2023-10-12 16:42 被阅读0次

    Springboot+Vue+Websocket 事例

    Springboot

    1.Maven导入websocket依赖

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>
    

    2.加入websocket配置类

    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.socket.server.standard.ServerEndpointExporter;
    
    /**
     * @author :宗
     * @date :Created in 2023/10/13 10:31
     * @description:WebSocket配置类
     */
    @Configuration
    public class WebSocketConfig {
        @Bean
        public ServerEndpointExporter serverEndpointExporter() {
            System.out.println("config");
            return new ServerEndpointExporter();
        }
    }
    

    3.封装websocket常用方法

    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONObject;
    import com.baomidou.mybatisplus.core.toolkit.StringUtils;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.stereotype.Component;
    
    import javax.websocket.*;
    import javax.websocket.server.PathParam;
    import javax.websocket.server.ServerEndpoint;
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.concurrent.ConcurrentHashMap;
    
    /**
     * @author :宗
     * @date :Created in 2023/10/13 10:35
     * @description:
     */
    @ServerEndpoint("/websocket/{userId}")
    @Component
    @Slf4j
    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 ConcurrentHashMap<String, WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
        /**
         * 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;
        /**
         * 接收userId
         */
        private String userId = "";
    
    
        /**
         * 连接建立成功调用的方法
         */
        @OnOpen
        public void onOpen(Session session, @PathParam("userId") String userId) {
            System.out.println("-------------------> onOpen");
            this.session = session;
            this.userId = userId;
            if (webSocketMap.containsKey(userId)) {
                webSocketMap.remove(userId);
                //加入set中
            } else {
                webSocketMap.put(userId, this);
                //加入set中
                addOnlineCount();
                //在线数加1
            }
    
            log.info("用户连接:" + userId + ",当前在线人数为:" + getOnlineCount());
    
            try {
                HashMap<Object, Object> map = new HashMap<>();
                map.put("key", "连接成功");
                sendMessage(JSON.toJSONString(map));
            } catch (IOException e) {
                log.error("用户:" + userId + ",网络异常!!!!!!");
            }
        }
    
        /**
         * 连接关闭调用的方法
         */
        @OnClose
        public void onClose() {
            System.out.println("-------------------> onClose");
            if (webSocketMap.containsKey(userId)) {
                webSocketMap.remove(userId);
                //从set中删除
                subOnlineCount();
            }
            log.info("用户退出:" + userId + ",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) {
            System.out.println("-------------------> onMessage");
            log.info("用户消息:" + userId + ",报文:" + message);
            //可以群发消息
            //消息保存到数据库、redis
            if (StringUtils.isNotBlank(message)) {
                try {
                    //解析发送的报文
                    JSONObject jsonObject = JSONObject.parseObject(message);
                    //追加发送人(防止串改)
                    jsonObject.put("fromUserId", this.userId);
                    String fromUserId = jsonObject.getString("fromUserId");
                    //传送给对应toUserId用户的websocket
                    if (StringUtils.isNotBlank(fromUserId) && webSocketMap.containsKey(fromUserId)) {
                        webSocketMap.get(fromUserId).sendMessage(jsonObject.toJSONString());
                        //自定义-业务处理
    //                    DeviceLocalThread.paramData.put(jsonObject.getString("group"),jsonObject.toJSONString());
                    } else {
                        log.error("请求的userId:" + fromUserId + "不在该服务器上");
                        //否则不在这个服务器上,发送到mysql或者redis
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    
        /**
         * 发生错误时候
         *
         * @param session
         * @param error
         */
        @OnError
        public void onError(Session session, Throwable error) {
            System.out.println("-------------------> onError");
            log.error("用户错误:" + this.userId + ",原因:" + error.getMessage());
            error.printStackTrace();
        }
    
        /**
         * 实现服务器主动推送
         */
        public void sendMessage(String message) throws IOException {
            System.out.println("-------------------> sendMessage");
            //加入线程锁
            synchronized (session) {
                try {
                    //同步发送信息
                    this.session.getBasicRemote().sendText(message);
                } catch (IOException e) {
                    log.error("服务器推送失败:" + e.getMessage());
                }
            }
        }
    
        /**
         * 发送自定义消息
         * */
        /**
         * 发送自定义消息
         *
         * @param message  发送的信息
         * @param toUserId 如果为null默认发送所有
         * @throws IOException
         */
        public static void sendInfo(String message, String toUserId) throws IOException {
            System.out.println("-------------------> sendInfo");
            //如果userId为空,向所有群体发送
            if (StringUtils.isEmpty(toUserId)) {
                //向所有用户发送信息
                Iterator<String> itera = webSocketMap.keySet().iterator();
                while (itera.hasNext()) {
                    String keys = itera.next();
                    WebSocketServer item = webSocketMap.get(keys);
                    item.sendMessage(message);
                }
            }
            //如果不为空,则发送指定用户信息
            else if (webSocketMap.containsKey(toUserId)) {
                WebSocketServer item = webSocketMap.get(toUserId);
                item.sendMessage(message);
            } else {
                log.error("请求的userId:" + toUserId + "不在该服务器上");
            }
        }
    
        public static synchronized int getOnlineCount() {
            return onlineCount;
        }
    
        public static synchronized void addOnlineCount() {
            WebSocketServer.onlineCount++;
        }
    
        public static synchronized void subOnlineCount() {
            WebSocketServer.onlineCount--;
        }
    
        public static synchronized ConcurrentHashMap<String, WebSocketServer> getWebSocketMap() {
            return WebSocketServer.webSocketMap;
        }
    }
    

    4.1使用postman进行ws的测试

    4.2使用网页进行ws测试(支持localhost本地测试)

    网站地址:http://www.websocket-test.com/

    Vue前端配置

    在App.vue中添加如下代码,针对于使用框架的,直接复制就好了。

    <script>
    export default {
        data() {
            return {
                // socket参数
                socket: null,
                timeout: 10 * 1000, // 45秒一次心跳
                timeoutObj: null, // 心跳心跳倒计时
                serverTimeoutObj: null, // 心跳倒计时
                timeoutnum: null, // 断开 重连倒计时
                lockReconnect: false, // 防止
                websocket: null
            };
        },
        methods: {
            initWebSocket() {
                // WebSocket与普通的请求所用协议有所不同,ws等同于http,wss等同于https
                let wsUrl = 'ws://localhost:9898/api/v1/websocket/' + localStorage.getItem('ms_username');
                this.websocket = new WebSocket(wsUrl);
                this.websocket.onopen = this.websocketonopen;
                this.websocket.onerror = this.websocketonerror;
                this.websocket.onmessage = this.setOnmessageMessage;
                this.websocket.onclose = this.websocketclose;
                // 监听窗口关闭事件,当窗口关闭时,主动去关闭websocket连接,防止连接还没断开就关闭窗口,server端会抛异常。
                // window.onbeforeunload = that.onbeforeunload
            },
            start() {
                console.log('start');
                console.log(localStorage.getItem('ms_username'));
                //清除延时器
                this.timeoutObj && clearTimeout(this.timeoutObj);
                this.serverTimeoutObj && clearTimeout(this.serverTimeoutObj);
                this.timeoutObj = setTimeout(() => {
                    if (this.websocket && this.websocket.readyState == 1) {
                        // let actions = { 'test': '12345' };
                        // this.websocket.send(JSON.stringify(actions));//发送消息,服务端返回信息,即表示连接良好,可以在socket的onmessage事件重置心跳机制函数
                    } else {
                        this.reconnect();
                    }
                    //定义一个延时器等待服务器响应,若超时,则关闭连接,重新请求server建立socket连接
                    this.serverTimeoutObj = setTimeout(() => {
                        this.websocket.close();
                    }, this.timeout);
                }, this.timeout);
            },
            reset() { // 重置心跳
                // 清除时间
                clearTimeout(this.timeoutObj);
                clearTimeout(this.serverTimeoutObj);
                // 重启心跳
                this.start();
            },
            // 重新连接
            reconnect() {
                if (this.lockReconnect) return;
                this.lockReconnect = true;
                //没连接上会一直重连,设置延迟避免请求过多
                this.timeoutnum && clearTimeout(this.timeoutnum);
                this.timeoutnum = setTimeout(() => {
                    this.initWebSocket();
                    this.lockReconnect = false;
                }, 5000);
            },
            async setOnmessageMessage(event) {
                // console.log(event.data, '获得消息');
                this.reset();
                // 自定义全局监听事件
                window.dispatchEvent(new CustomEvent('onmessageWS', {
                    detail: {
                        data: event.data
                    }
                }));
                //发现消息进入 开始处理前端触发逻辑
                // if (event.data === 'success' || event.data === 'heartBath') return
            },
            websocketonopen() {
                //开启心跳
                this.start();
                console.log('WebSocket连接成功!!!' + new Date() + '----' + this.websocket.readyState);
                clearInterval(this.otimer);//停止
            },
            websocketonerror(e) {
                console.log('WebSocket连接发生错误' + e);
            },
            websocketclose(e) {
                this.websocket.close();
                clearTimeout(this.timeoutObj);
                clearTimeout(this.serverTimeoutObj);
                console.log('WebSocket连接关闭');
            },
            websocketsend(messsage) {
                that.websocket.send(messsage);
            },
            closeWebSocket() { // 关闭websocket
                that.websocket.close();
            }
            //  // 收到消息处理
            // getSocketData (res) {
            //  if (res.detail.data === 'success' || res.detail.data === 'heartBath') return
            //  // ...业务处理
            // }
        },
        mounted() {
            this.initWebSocket();
        }
    };
    </script>
    

    在需要使用的界面添加监听器

    methods:{
        getSocketData(res) {
                let parse = JSON.parse(res.detail.data);
                console.log(parse.msg);
            }
    },
    mounted() {
            window.addEventListener('onmessageWS', this.getSocketData);
        }
    

    到此不出意外的话,【应该出意外了(bushi)】,就配置好了!

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