先来看下效果，如果是你想要的效果就继续往下面看

如果你只是单纯的想使用前端或者后端也是可以的

前端：vue

<template>    
	<div>       
		<h1>测试webSocket</h1>      
		<button @click="getWebsocket">点击请求后台数据</button>    
	</div>    
</template>
<script>
export default {        
	created() { // 页面创建生命周期函数              
		this.initWebSocket()        
	},        
	destroyed: function () { // 离开页面生命周期函数              
		this.websocketclose();        
	},        
	methods: {            
		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                
			this.websock = new WebSocket("ws://localhost:8185/api/websocket/DPS007");                
			this.websock.onopen = this.websocketonopen;                
			this.websock.onerror = this.websocketonerror;                
			this.websock.onmessage = this.websocketonmessage;                
			this.websock.onclose = this.websocketclose;              
		},              
		websocketonopen: function () {                
			console.log("WebSocket连接成功");              
		},              
		websocketonerror: function (e) {                
			console.log("WebSocket连接发生错误");              
		},              
		websocketonmessage: function (e) {                
			console.log(e.data);                // console.log(e);              
		},              
		websocketclose: function (e) {                
			console.log("connection closed (" + e.code + ")");              
		},              
		getWebsocket:function(){                l
			et url = "http://localhost:8185/api/teachStf/import?shipId=DPS007"                
			// 这里只是一个基于axios的ajax请求，你可以换成你的请求格式                
			this.$ajax.get(url)              
		}       
	 }    
}
</script>
<style lang="less" scoped>
</style>

后端：java

1、WebSocketConfig

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

@Configuration
public class WebSocketConfig {

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

2、WebSocket

package com.xdx97.party.common.config;

import org.springframework.stereotype.Component;

import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArraySet;

@Component
@ServerEndpoint("/websocket/{shopId}")
//此注解相当于设置访问URL
public class WebSocket {

    private Session session;

    private static CopyOnWriteArraySet<WebSocket> webSockets =new CopyOnWriteArraySet<>();
    private static Map<String,Session> sessionPool = new HashMap<String,Session>();

    @OnOpen
    public void onOpen(Session session, @PathParam(value="shopId")String shopId) {
        this.session = session;
        webSockets.add(this);
        sessionPool.put(shopId, session);
        System.out.println("【websocket消息】有新的连接，总数为:"+webSockets.size());
    }

    @OnClose
    public void onClose() {
        webSockets.remove(this);
        System.out.println("【websocket消息】连接断开，总数为:"+webSockets.size());
    }

    @OnMessage
    public void onMessage(String message) {
        System.out.println("【websocket消息】收到客户端消息:"+message);
    }

    // 此为广播消息
    public void sendAllMessage(String message) {
        for(WebSocket webSocket : webSockets) {
            System.out.println("【websocket消息】广播消息:"+message);
            try {
                webSocket.session.getAsyncRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // 此为单点消息 (发送文本)
    public void sendTextMessage(String shopId, String message) {
        Session session = sessionPool.get(shopId);
        if (session != null) {
            try {
                session.getBasicRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // 此为单点消息 (发送对象)
    public void sendObjMessage(String shopId, Object message) {
        Session session = sessionPool.get(shopId);
        if (session != null) {
            try {
                session.getAsyncRemote().sendObject(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

}

3、测试

你后台写一个请求的方法，把下面代码放进去就好了

for (int i = 0; i < 10; i++){
    Thread.sleep(1000);
    webSocket.sendTextMessage(shipId, ""+i);
}

并且注入webSocket

@Autowired
private WebSocket webSocket;

给你看看我的方法做参考

鉴于有几个小伙伴需要源码，我又重新写了这个demo，获取方式关注公众号后台回复：WebSocketDemo

各位老哥，如果对你有帮助，关注后可否不取消。