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

package com.ruoyi.framework.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

/**
 * 开启WebSocket支持
 */
@Configuration
public class WebSocketConfig {
    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }
}

package com.ruoyi.framework.websocket;

import cn.hutool.json.JSONUtil;
import com.ruoyi.common.core.domain.BaseProtocol;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.concurrent.CopyOnWriteArraySet;
import java.util.concurrent.atomic.AtomicInteger;

// @ServerEndpoint 声明并创建了webSocket端点, 并且指明了请求路径
// id 为客户端请求时携带的参数, 用于服务端区分客户端使用

/**
 * @ServerEndpoint 声明并创建了websocket端点, 并且指明了请求路径
 * uid 为客户端请求时携带的用户id, 用于区分发给哪个用户的消息
 * @author nbacheng
 * @date 2023-09-20
*/

@ServerEndpoint("/websocket/{uid}")
@Component
public class WebSocketServer {

    // 日志对象
    private static final Logger log = LoggerFactory.getLogger(WebSocketServer.class);

    // 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。
    //千万不要用++

    private static AtomicInteger onlineCount = new AtomicInteger(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<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<>();
    // private static ConcurrentHashMap<String,WebSocketServer> websocketList = 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uid
    private String uid = "";

    /*
     * 客户端创建连接时触发
     * */
    @OnOpen
    public void onOpen(Session session, @PathParam("uid") String uid) {
        this.session = session;
        webSocketSet.add(this); // 加入set中
        addOnlineCount(); // 在线数加1
        log.info("有新窗口开始监听:" + uid + ", 当前在线人数为" + getOnlineCount());
        this.uid = uid;
        try {
            sendMessage("连接成功");
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }

    /**
     * 客户端连接关闭时触发
     **/
    @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());
    }

    /**
     * 接收到客户端消息时触发
     */
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("收到来自窗口" + uid + "的信息:" + message);
        // 群发消息
        for (WebSocketServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 连接发生异常时候触发
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 实现服务器主动推送(向浏览器发消息)
     */
    public void sendMessage(String message) throws IOException {
        log.info("服务器消息推送："+message);
        this.session.getAsyncRemote().sendText(message);
    }

    /**
     * 发送消息到所有客户端
     * 指定uid则向指定客户端发消息
     * 不指定uid则向所有客户端发送消息
     * */
    public static void sendInfo(String message, @PathParam("uid") String uid) throws IOException {
        log.info("推送消息到窗口" + uid + "，推送内容:" + message);
        for (WebSocketServer item : webSocketSet) {
            try {
                // 这里可以设定只推送给这个sid的，为null则全部推送
                if (uid == null) {
                    item.sendMessage(message);
                } else if (item.uid.equals(uid)) {
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }
    
    /**
     * 
     * 给多个指定uid客户端发消息
     * 
     * */
    public static void sendInfo(String message, @PathParam("uids") String[] uids ) throws IOException {
        log.info("推送消息到窗口" + uids + "，推送内容:" + message);
        for (String uid : uids) {
        	sendInfo(message,uid);
        }
    }
        

    /**
     * 发送消息到所有客户端
     * 指定uid则向指定客户端发消息
     * 不指定uid则向所有客户端发送消息
     * */
    public static void sendInfo(BaseProtocol message, @PathParam("uid") String uid) throws IOException {
        log.info("推送消息到窗口" + uid + "，推送内容:" + message);
        for (WebSocketServer item : webSocketSet) {
            try {
                // 这里可以设定只推送给这个sid的，为null则全部推送
                if (uid == null) {
                    item.sendMessage(JSONUtil.toJsonStr(message));
                } else if (item.uid.equals(uid)) {
                    item.sendMessage(JSONUtil.toJsonStr(message));
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount.get();
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount.incrementAndGet();
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount.decrementAndGet();
    }

    public static CopyOnWriteArraySet<WebSocketServer> getWebSocketSet() {
        return webSocketSet;
    }

}

<el-tooltip content="消息" effect="dark" placement="bottom">
           <!--<message id="message" class="right-menu-item hover-effect"  /> -->
           <header-notice id="message" class="right-menu-item-message hover-effect" />
        </el-tooltip>

right-menu-item-message {
      display: inline-block;
      padding: 0 8px;
      height: 100%;
      font-size: 18px;
      color: #5a5e66;
      vertical-align: text-bottom;
      width: 36px;
    
      &.hover-effect {
        cursor: pointer;
        transition: background .3s;
    
        &:hover {
          background: rgba(0, 0, 0, .025)
        }
      }
    }

<template>
  <div>
    <a-popover trigger="click" placement="bottomRight" :autoAdjustOverflow="true" :arrowPointAtCenter="true"
      overlayClassName="header-notice-wrapper" @visibleChange="handleHoverChange"
      :overlayStyle="{ width: '400px', top: '50px' }">
      <template slot="content">
        <a-spin :spinning="loadding">
          <a-tabs>
            <a-tab-pane :tab="msg1Title" key="1">
              <a-list>
                <a-list-item :key="index" v-for="(record, index) in announcement1">
                  <div style="margin-left: 5%;width: 50%">
                    <p><a @click="showAnnouncement(record)">{{ record.titile }}</a></p>
                    <p style="color: rgba(0,0,0,.45);margin-bottom: 0px">{{ record.createTime }} 发布</p>
                  </div>
                  <div style="text-align: right">
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'L'" color="blue">一般消息</a-tag>
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'M'" color="orange">重要消息</a-tag>
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'H'" color="red">紧急消息</a-tag>
                  </div>
                </a-list-item>
                <div style="margin-top: 5px;text-align: center">
                  <a-button @click="toMyAnnouncement()" type="dashed" block>查看更多</a-button>
                </div>
              </a-list>
            </a-tab-pane>
            <a-tab-pane :tab="msg2Title" key="2">
              <a-list>
                <a-list-item :key="index" v-for="(record, index) in announcement2">
                  <div style="margin-left: 5%;width: 50%">
                    <p><a @click="showAnnouncement(record)">{{ record.titile }}</a></p>
                    <p style="color: rgba(0,0,0,.45);margin-bottom: 0px">{{ record.createTime }} 发布</p>
                  </div>
                  <div style="text-align: right">
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'L'" color="blue">一般消息</a-tag>
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'M'" color="orange">重要消息</a-tag>
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'H'" color="red">紧急消息</a-tag>
                  </div>
                </a-list-item>
                <div style="margin-top: 5px;text-align: center">
                  <a-button @click="toMyAnnouncement()" type="dashed" block>查看更多</a-button>
                </div>
              </a-list>
            </a-tab-pane>
            <a-tab-pane :tab="msg3Title" key="3">
              <a-list>
                <a-list-item :key="index" v-for="(record, index) in announcement3">
                  <div style="margin-left: 5%;width: 50%">
                    <p><a @click="showAnnouncement(record)">{{ record.titile }}</a></p>
                    <p style="color: rgba(0,0,0,.45);margin-bottom: 0px">{{ record.createTime }} 发布</p>
                  </div>
                  <div style="text-align: right">
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'L'" color="blue">一般消息</a-tag>
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'M'" color="orange">重要消息</a-tag>
                    <a-tag @click="showAnnouncement(record)" v-if="record.priority === 'H'" color="red">紧急消息</a-tag>
                  </div>
                </a-list-item>
                <div style="margin-top: 5px;text-align: center">
                  <a-button @click="toMyAnnouncement()" type="dashed" block>查看更多</a-button>
                </div>
              </a-list>
            </a-tab-pane>
          </a-tabs>
        </a-spin>
      </template>
      <span @click="fetchNotice" class="header-notice">
        <a-badge :count="msgTotal">
          <a-icon style="font-size: 16px; padding: 4px" type="bell" />
        </a-badge>
      </span>
      <show-announcement ref="ShowAnnouncement" @ok="modalFormOk"></show-announcement>
      <dynamic-notice ref="showDynamNotice" :path="openPath" :formData="formData" />
    </a-popover>
  </div>
</template>

<script>
  import ShowAnnouncement from './ShowAnnouncement'
  import store from '@/store/'
  import DynamicNotice from './DynamicNotice'


  export default {
    name: "HeaderNotice",
    components: {
      DynamicNotice,
      ShowAnnouncement,
    },
    data() {
      return {
        loadding: false,
        url: {
          listCementByUser: "/sys/annountCement/listByUser",
          editCementSend: "/sys/sysAnnouncementSend/editByAnntIdAndUserId",
          queryById: "/sys/annountCement/queryById",
        },
        hovered: false,
        announcement1: [],
        announcement2: [],
        announcement3: [],
        msg1Count: "0",
        msg2Count: "0",
        msg3Count: "0",
        msg1Title: "通知(0)",
        msg2Title: "",
        msg3Title: "",
        stopTimer: false,
        websock: null,
        lockReconnect: false,
        heartCheck: null,
        formData: {},
        openPath: ''
      }
    },
    computed: {
      msgTotal() {
        return parseInt(this.msg1Count) + parseInt(this.msg2Count) + parseInt(this.msg3Count);
      }
    },
    mounted() {
      //this.loadData();
      //this.timerFun();
      this.initWebSocket();
      // this.heartCheckFun();
    },
    destroyed: function() { // 离开页面生命周期函数
      this.websocketOnclose();
    },
    methods: {
      timerFun() {
        this.stopTimer = false;
        let myTimer = setInterval(() => {
          // 停止定时器
          if (this.stopTimer == true) {
            clearInterval(myTimer);
            return;
          }
          this.loadData()
        }, 6000)
      },
      loadData() {
        try {
          // 获取系统消息
          getAction(this.url.listCementByUser).then((res) => {
            if (res.success) {
              this.announcement1 = res.result.anntMsgList;
              this.msg1Count = res.result.anntMsgTotal;
              this.msg1Title = "通知(" + res.result.anntMsgTotal + ")";
              this.announcement2 = res.result.sysMsgList;
              this.msg2Count = res.result.sysMsgTotal;
              this.msg2Title = "系统消息(" + res.result.sysMsgTotal + ")";
              this.announcement3 = res.result.todealMsgList;
              this.msg3Count = res.result.todealMsgTotal;
              this.msg3Title = "待办消息(" + res.result.todealMsgTotal + ")";
            }
          }).catch(error => {
            console.log("系统消息通知异常", error); //这行打印permissionName is undefined
            this.stopTimer = true;
            console.log("清理timer");
          });
        } catch (err) {
          this.stopTimer = true;
          console.log("通知异常", err);
        }
      },
      fetchNotice() {
        if (this.loadding) {
          this.loadding = false
          return
        }
        this.loadding = true
        setTimeout(() => {
          this.loadding = false
        }, 200)
      },
      showAnnouncement(record) {
        putAction(this.url.editCementSend, {
          anntId: record.id
        }).then((res) => {
          if (res.success) {
            this.loadData();
          }
        });
        this.hovered = false;
        if (record.openType === 'component') {
          this.openPath = record.openPage;
          this.formData = {
            id: record.busId
          };
          this.$refs.showDynamNotice.detail(record.openPage);
        } else {
          this.$refs.ShowAnnouncement.detail(record);
        }
      },
      toMyAnnouncement() {
        this.$router.push({
          path: '/isps/userAnnouncement'
        });
      },
      modalFormOk() {},
      handleHoverChange(visible) {
        this.hovered = visible;
      },

      initWebSocket: function() {
        // 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
        var uid = store.getters.name;
        var url = process.env.VUE_APP_WS_API + "/websocket/" + uid;
        console.log("url=",url);
        this.websock = new WebSocket(url);
        this.websock.onopen = this.websocketOnopen;
        this.websock.onerror = this.websocketOnerror;
        this.websock.onmessage = this.websocketOnmessage;
        this.websock.onclose = this.websocketOnclose;
      },
      websocketOnopen: function() {
        console.log("WebSocket连接成功");
        //心跳检测重置
        //this.heartCheck.reset().start();
      },
      websocketOnerror: function(e) {
        console.log("WebSocket连接发生错误");
        this.reconnect();
      },
      websocketOnmessage: function(e) {
        console.log("-----接收消息-------", e);
        console.log("-----接收消息-------", e.data);
        var data = eval（"(" + e.data + ")"); //解析对象
        if (data.cmd == "topic") {
          //系统通知
          //this.loadData();
          this.$notification.open({ //websocket消息通知弹出
            message: 'websocket消息通知',
            description: data.msgTxt,
            style: {
              width: '600px',
              marginLeft: `${335 - 600}px`,
            },
          });
        } else if (data.cmd == "user") {
          //用户消息
          //this.loadData();
          this.$notification.open({
            message: 'websocket消息通知',
            description: data.msgTxt,
            style: {
              width: '600px',
              marginLeft: `${335 - 600}px`,
            },
          });
        }
        //心跳检测重置
        //this.heartCheck.reset().start();
      },
      websocketOnclose: function(e) {
        console.log("connection closed (" + e + ")");
        if (e) {
          console.log("connection closed (" + e.code + ")");
        }
        this.reconnect();
      },
      websocketSend(text) { // 数据发送
        try {
          this.websock.send(text);
        } catch (err) {
          console.log("send failed (" + err.code + ")");
        }
      },

      openNotification(data) {
        var text = data.msgTxt;
        const key = `open${Date.now()}`;
        this.$notification.open({
          message: '消息提醒',
          placement: 'bottomRight',
          description: text,
          key,
          btn: (h) => {
            return h('a-button', {
              props: {
                type: 'primary',
                size: 'small',
              },
              on: {
                click: () => this.showDetail(key, data)
              }
            }, '查看详情')
          },
        });
      },

      reconnect() {
        var that = this;
        if (that.lockReconnect) return;
        that.lockReconnect = true;
        //没连接上会一直重连，设置延迟避免请求过多
        setTimeout(function() {
          console.info("尝试重连...");
          that.initWebSocket();
          that.lockReconnect = false;
        }, 5000);
      },
      heartCheckFun() {
        var that = this;
        //心跳检测,每20s心跳一次
        that.heartCheck = {
          timeout: 20000,
          timeoutObj: null,
          serverTimeoutObj: null,
          reset: function() {
            clearTimeout(this.timeoutObj);
            //clearTimeout(this.serverTimeoutObj);
            return this;
          },
          start: function() {
            var self = this;
            this.timeoutObj = setTimeout(function() {
              //这里发送一个心跳，后端收到后，返回一个心跳消息，
              //onmessage拿到返回的心跳就说明连接正常
              that.websocketSend("HeartBeat");
              console.info("客户端发送心跳");
              //self.serverTimeoutObj = setTimeout(function(){//如果超过一定时间还没重置，说明后端主动断开了
              //  that.websock.close();//如果onclose会执行reconnect，我们执行ws.close()就行了.如果直接执行reconnect 会触发onclose导致重连两次
              //}, self.timeout)
            }, this.timeout)
          }
        }
      },


      showDetail(key, data) {
        this.$notification.close(key);
        var id = data.msgId;
        getAction(this.url.queryById, {
          id: id
        }).then((res) => {
          if (res.success) {
            var record = res.result;
            this.showAnnouncement(record);
          }
        })

      },
    }
  }
</script>

<style lang="css">
  .header-notice-wrapper {
    top: 50px !important;
  }
</style>
<style lang="less" scoped>
  .header-notice {
    display: inline-block;
    transition: all 0.3s;

    span {
      vertical-align: initial;
    }
  }
</style>

<template>
  <div>
    <el-input v-model="url" type="text" style="width: 100%" />    
    <br />
    <el-button @click="join" type="primary">连接</el-button>
    <el-button @click="exit" type="danger">断开</el-button>

    <br />
    <el-input type="textarea" v-model="message" :rows="9" />
    <el-button type="info" @click="send">发送消息</el-button>
    <br />
    <br />
    <el-input type="textarea" v-model="text_content" :rows="9" /> 返回内容
    <br />
    <br />
  </div>
</template>

<script>
export default {
  data() {
    return {
      url: "ws://127.0.0.1:9060/websocket/ry",
      message: "",
      text_content: "",
      ws: null,
    };
  },
  methods: {
    join() {
      const wsuri = this.url;
      this.ws = new WebSocket(wsuri);
      const self = this;
      this.ws.onopen = function (event) {
        self.text_content = self.text_content + "已经打开连接!" + "\n";
      };
      this.ws.onmessage = function (event) {
        self.text_content = event.data + "\n";
      };
      this.ws.onclose = function (event) {
        self.text_content = self.text_content + "已经关闭连接!" + "\n";
      };
    },
    exit() {
      if (this.ws) {
        this.ws.close();
        this.ws = null;
      }
    },
    send() {
      if (this.ws) {
        const messageData = {
          msgTxt: this.message,
          cmd: 'user'
        }
        let strdata = JSON.stringify(messageData);
         console.log("strdata",JSON.stringify(messageData));
        this.ws.send(strdata);
        //this.ws.send(this.message);
      } else {
        alert("未连接到服务器");
      }
    },
  },
};
</script>