Spring boot实现WebSocket服务

1 引入jar

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

2 编写组件

package com.lark.system.common.websocket.config;

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

/***
 * @ClassName: WebSocketConfig
 * @Description: WebSocket 配置
 * @Auther: pengbaowei
 * @Date: 2019/12/12
 * @version : V1.0
 */
@Configuration
public class WebSocketConfig {

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

 

3 服务类

package com.lark.system.common.websocket.server;


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;

/***
 * @ClassName: WebSocketServer
 * @Description: WebSocket 服务
 * @Auther: pengbaowei
 * @Date: 2019/12/12
 * @version : V1.0
 */
@ServerEndpoint("/webSocket/{sid}")
@Component
public class WebSocketServer {
    //在线数量
    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WebSocketServer对象。
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();
    //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sid
    private String sid = "";

    /**
     *  连接成功后事件
     * @param session
     * @param sid
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {
        this.session = session;
        webSocketSet.add(this);
        addOnlineCount();
        this.sid = sid;
        try {
            sendMessage("连接成功");
        } catch (IOException e) {

        }
    }

    /**
     * 客户端关闭会事件
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
    }

    /**
     * 收到客户端的消息后事件
     * @param message
     * @param session
     */
    @OnMessage
    public void onMessage(String message, Session session) {
       try {
           session.getBasicRemote().sendText("服务端:系统已经收到你的消息！");
       }catch (Exception e){

       }
    }

    /**
     * 发生错误事件
     * @param session
     * @param error
     */
    @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
     */
    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }


    /**
     * 群发自定义消息
     */
    public static void sendInfo(String message, @PathParam("sid") String sid) throws IOException {
        //log.info("推送消息到窗口"+sid+"，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 (sid == null) {
                    item.sendMessage(message);
                } else if (item.sid.equals(sid)) {
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

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

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

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


}

 4 前端页面连接

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>客户端一</title>
    <script>
        var socketClient;
        if(typeof(WebSocket) == "undefined") {
            console.log("您的浏览器不支持WebSocket");
        }else{
            console.log("您的浏览器支持WebSocket");
            //实现化WebSocket对象，指定要连接的服务器地址与端口  建立连接
            //等同于socket = new WebSocket("ws://127.0.0.1:8082/webSocket/1");
            socketClient = new WebSocket("ws://127.0.0.1:8082/webSocket/1");
            //打开事件
            socketClient.onopen = function() {
                console.log("Socket 已打开");
                socketClient.send("这是来自客户端的消息" + location.href + new Date());
            };
            //获得消息事件
            socketClient.onmessage = function(msg) {
                console.log(msg.data);
            };
            //关闭事件
            socketClient.onclose = function() {
                console.log("Socket已关闭");
            };
            //发生了错误事件
            socketClient.onerror = function() {
                alert("Socket发生了错误");
                //此时可以尝试刷新页面
            }
            //离开页面时，关闭socket
            //jquery1.8中已经被废弃，3.0中已经移除
            // $(window).unload(function(){
            //     socket.close();
            //});
        }
        
        function sendMessage() {
            let msg = document.getElementById("msg").value;
            socketClient.send(msg);
        }
    </script>
</head>
<body>
<div style="height: 500px; width: 60%" >
    <div style="height: 60%; width: 100%">
      <input id="msg" type="text" style="width: 100%; height: 100%">
    </div>
    <div><button onclick="sendMessage()">发送</button></div>
</div>
</body>

</html>

 

　　

posted @ 2019-12-13 10:40  Bowell  阅读(278)  评论(0)    收藏  举报