speingboot+websocket主动推送消息

最新推荐文章于 2024-08-16 14:39:00 发布

花小妖_丫丫

最新推荐文章于 2024-08-16 14:39:00 发布

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本文链接：https://blog.youkuaiyun.com/qq_34463172/article/details/86716532

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pom.xml配置：

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

服务器端java

package com.csv.util;




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;

    @Component
    @ServerEndpoint("/webSocket")
    public class WebSocket {

        private Session session;
        private static CopyOnWriteArraySet<WebSocket> webSockets=new CopyOnWriteArraySet<>();
        private Timer timer = new Timer();
        @Autowired
        private DeviceDataService deviceDataService;
        @Autowired
        private ParameterTypeService parameterTypeService;
        @Autowired
        private DeviceService deviceService;
        private BlockingQueue<Object> msgQueue=new LinkedBlockingDeque<Object>();
        private static WebSocket webSocket;
         @Autowired
        private RedisTemplate<Serializable, Object> redisTemplate;
        @PostConstruct
         public void init() {
            webSocket = this;
            webSocket.redisTemplate=this.redisTemplate;
            webSocket.deviceDataService=this.deviceDataService;
            webSocket.parameterTypeService=this.parameterTypeService;
            webSocket.deviceService=this.deviceService;
        }
        @OnOpen
        public void onOpen(@PathParam("cId") String cId, Session session){
            this.session=session;
            webSockets.add(this);
            System.out.println("有新的连接，总数"+webSockets.size());
 
            timer.schedule(new TimerTask() {
                public void run() {
                    sendMessage();
                }
            }, 0, 600);

        }

        @OnClose
        public void onClose(){
            timer.cancel();
            webSockets.remove(this);
            System.out.println("有新的断开，总数"+webSockets.size());
        }


        @OnMessage
        public void onMessage(String message) throws IOException {

        }

        public void sendMessage() {
            JsonUtils jsonUtils=new JsonUtils();
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
            Date date=new Date();
            String time=df.format(date);
            try {
              this.session.getBasicRemote().sendText(jsonUtils.obj2String(time));
             } catch (Exception e) {
                e.printStackTrace();
            }
     }
 }

页面html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>WebSocket</title>
</head>
<body>
<input id="text" type="text"/>
<button οnclick="send()">发送消息</button>
<hr/>
<button οnclick="closeWebSocket()">关闭WebSockeet连接</button>
<hr/>
<div id="message"></div>
</body>
</html>

//连接发生错误的回调方法
webSocket.οnerrοr=function () {
setMessageInnerHTML("WebSocket连接发生错误！");
}

webSocket.onopen=function () {
setMessageInnerHTML("WebSocket连接成功！")
}
webSocket.onmessage=function (event) {
console.log(event.data);
message=event.data;
setMessageInnerHTML(event.data);
}

webSocket.onclose=function () {
setMessageInnerHTML("WebSocket连接关闭");
}

window.οnbefοreunlοad=function () {
closeWebSocket();
}

function closeWebSocket() {
webSocket.close();
}

function send() {
var message=document.getElementById('text').value;
webSocket.send(message);
}

//将消息显示在网页上
function setMessageInnerHTML(innerHTML) {

document.getElementById('message').innerHTML+=innerHTML+'<br/>';
}
</script>

socket连接成功