SpringBoot集成websocket并区分不同页面来源

首先web.xml添加支持

<!-- 添加websocket支持 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
            <version>1.4.1.RELEASE</version>
        </dependency>

配置socket

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();
    }

}

创建socket

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.ConcurrentHashMap;

@ServerEndpoint(value = "/websocket/{user}")
@Component
public class MyWebSocket {
    /**
     * 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。
     */
    public static ConcurrentHashMap<String,MyWebSocket> webSocketSet = new ConcurrentHashMap<String,MyWebSocket>();
    
    /**
     * 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;
    /**
     * 传过来的用户
     */
    private String user = "";
    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(@PathParam(value = "user") String param, Session session) {

        //接收到发送消息的人员编号
        user = param;
        this.session = session;
        /**加入set中*/
        webSocketSet.put(param,this);
        /**在线数加1*/
        addOnlineCount();
        System.out.println("有新连接加入！当前在线人数为" + getOnlineCount());
        try {
            sendMessage("-连接已建立-");
        } catch (IOException e) {
            System.out.println("IO异常");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        if (!user.equals("")) {

            /** 从set中删除 */
            webSocketSet.remove(user);
            /** 在线数减1 */
            subOnlineCount();
            System.out.println("有一连接关闭！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("来自客户端的消息:" + message);

        try {
            this.sendMessage(message);
            String sendUserno = message.split("[;]")[0];
//            String sendMessage = message.split("[;]")[1];
//            webSocketSet.get(sendUserno).sendMessage(message);
         
        } catch (IOException e) {
            e.printStackTrace();
        } catch (MqttException e) {
            e.printStackTrace();
        }

//        //群发消息
//        for (MyWebSocket item : webSocketSet) {
//            try {
//                item.sendMessage(message);
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
    }

    /**
     * 发生错误时调用
     * **/
     @OnError
     public void onError(Session session, Throwable error) {
     System.out.println("发生错误");
     error.printStackTrace();
     }


     public  void sendMessage(String message) throws IOException {
         synchronized (session) {
            session.getBasicRemote().sendText(message);
         }
     }

    /**
     * 给指定的人发送消息
     * @param message
     */
    private  void sendToUser(String message) {
        String sendUserno = message.split("[;]")[0];
        String sendMessage = message.split("[;]")[1];

        try {
            if (webSocketSet.get(sendUserno) != null) {
                webSocketSet.get(sendUserno).sendMessage( "用户" + user + "发来消息：" + " <br/> " + sendMessage);
            } else {
                System.out.println("当前用户不在线");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

     /**
      * 群发自定义消息
      * */
    public static void sendInfo(String message) throws IOException {
        for (MyWebSocket item : webSocketSet.values()) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                continue;
            }
        }
    }

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

    public static synchronized void addOnlineCount() {
        MyWebSocket.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        MyWebSocket.onlineCount--;
    }
}

html页面

<!DOCTYPE HTML>
<html>
<head>
    <title> WebSocket</title>
    <style>
    	body{padding: 20px;background: #f5f5f5;}
    	#message{border: 1px dashed skyblue;padding: 20px;min-height: 300px;background: white;}
    	p{border-bottom: 1px dashed cornflowerblue;;}
    </style>
</head>
<br />
<body>
<div>
	<b>WebSocket</b><br />
	<input id="text" type="text" placeholder="请输入内容"/><button id="con" onclick="send()">发送</button> <button id="con" onclick="connect()">连接socke</button>    
	<button class="btn btn-info btn-sm" onclick="closeWebSocket()">关闭连接</button>
	<button class="btn btn-warning btn-sm" onclick="clearMsg()">清屏</button>
	
	<br /><br />
</div>
<div id="message">
</div>
</body>
<div th:include="include/footer_js::footer"></div>
<script type="text/javascript">
    var websocket = null;
  	var user=new Date().getTime();
    //判断当前浏览器是否支持WebSocket
    function connect(){
	    if('WebSocket' in window){
	        websocket = new WebSocket("ws://localhost:8099/websocket/"+user);
	        $("#con").attr("disabled","disabled");
	    }
	    else{
	        alert('Not support websocket')
	    }
	
	    //连接发生错误的回调方法
	    websocket.onerror = function(){
	        setMessageInnerHTML("error");
	    };
	
	    //连接成功建立的回调方法
	    websocket.onopen = function(event){
	        setMessageInnerHTML("连接成功!");
	    }
	
	    //接收到消息的回调方法
	    websocket.onmessage = function(event){
	        setMessageInnerHTML("<p>"+event.data+"</p>");
	    }
	
	    //连接关闭的回调方法
	    websocket.onclose = function(){
	        setMessageInnerHTML("close");
	        $("#con").removeAttr("disabled");
	    }
	
	    //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 = function(){
	        websocket.close();
	    }
 	}
    //将消息显示在网页上
    function setMessageInnerHTML(innerHTML){
        document.getElementById('message').innerHTML += innerHTML + '<br/>';
    }

    //关闭连接
    function closeWebSocket(){
        websocket.close();
        setMessageInnerHTML("已关闭!");
    }
	function clearMsg(){
		$('#message').empty();
	}
    //发送消息
    function send(){
        var message = document.getElementById('text').value;
        message=user+";"+message;
        websocket.send(message);
    }
   
    
</script>
</html>

针对于多个终端，所以在初始化和发消息时，传递一个值作为用户标识。

SpringBoot集成websocket并区分不同页面来源

猜你喜欢