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SpringBoot实现WebSocket即时通讯的示例代码

2024-04-02 19:55

关注

1、引入依赖

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
	<groupId>org.projectlombok</groupId>
	<artifactId>lombok</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>fastjson</artifactId>
	<version>1.2.3</version>
</dependency>

2、WebSocketConfig 开启WebSocket

package com.shucha.deveiface.web.config;
 

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();
    }
}
 

3、WebSocketServer

package com.shucha.deveiface.web.ws;
 

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.WebSocketSession;
 
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
 
@Component
@ServerEndpoint("/webSocket/{userId}")
@Slf4j
public class WebSocketServer {
    private Session session;
    private String userId;
    
    private static int onlineCount = 0;
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<>();
 
    
    private static ConcurrentHashMap<String,WebSocketServer> webSocketMap = new ConcurrentHashMap();
 
    
    private final static List<Session> SESSIONS = Collections.synchronizedList(new ArrayList<>());
 
    
    @OnOpen
    public void onOpen(Session session, @PathParam("userId") String userId) {
        this.session = session;
        this.userId = userId;
        webSocketSet.add(this);
        SESSIONS.add(session);
        if (webSocketMap.containsKey(userId)) {
            webSocketMap.remove(userId);
            webSocketMap.put(userId,this);
        } else {
            webSocketMap.put(userId,this);
            addOnlineCount();
        }
        // log.info("【websocket消息】有新的连接, 总数:{}", webSocketSet.size());
        log.info("[连接ID:{}] 建立连接, 当前连接数:{}", this.userId, webSocketMap.size());
    }
 
    
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);
        if (webSocketMap.containsKey(userId)) {
            webSocketMap.remove(userId);
            subOnlineCount();
        }
        // log.info("【websocket消息】连接断开, 总数:{}", webSocketSet.size());
        log.info("[连接ID:{}] 断开连接, 当前连接数:{}", userId, webSocketMap.size());
    }
 
    
    @OnError
    public void onError(Session session, Throwable error) {
        log.info("[连接ID:{}] 错误原因:{}", this.userId, error.getMessage());
        error.printStackTrace();
    }
 
    
    @OnMessage
    public void onMessage(String message) {
        // log.info("【websocket消息】收到客户端发来的消息:{}", message);
        log.info("[连接ID:{}] 收到消息:{}", this.userId, message);
    }
 
    
    public void sendMessage(String message,Long userId) {
        WebSocketServer webSocketServer = webSocketMap.get(String.valueOf(userId));
        if (webSocketServer!=null){
            log.info("【websocket消息】推送消息, message={}", message);
            try {
                webSocketServer.session.getBasicRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
                log.error("[连接ID:{}] 发送消息失败, 消息:{}", this.userId, message, e);
            }
        }
    }
 
    
    public void sendMassMessage(String message) {
        try {
            for (Session session : SESSIONS) {
                if (session.isOpen()) {
                    session.getBasicRemote().sendText(message);
                    log.info("[连接ID:{}] 发送消息:{}",session.getRequestParameterMap().get("userId"),message);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    
    public static synchronized int getOnlineCount() {
        return onlineCount;
    }
 
    
    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }
 
    
    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }
 
}

4、测试连接发送和接收消息

package com.shucha.deveiface.web.controller;
 
import com.alibaba.fastjson.JSONObject;
import com.shucha.deveiface.web.ws.WebSocketServer;
import lombok.Data;
import lombok.experimental.Accessors;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 

@RestController
@RequestMapping("/web")
public class TestWebSocket {
    @Autowired
    private WebSocketServer webSocketServer;
 
    
    @GetMapping("/test")
    public void test(){
        for (int i=1;i<4;i++) {
            WebsocketResponse response = new WebsocketResponse();
            response.setUserId(String.valueOf(i));
            response.setUserName("姓名"+ i);
            response.setAge(i);
            webSocketServer.sendMessage(JSONObject.toJSONString(response), Long.valueOf(String.valueOf(i)));
        }
    }
 
    
    @GetMapping("/sendMassMessage")
    public void sendMassMessage(){
        WebsocketResponse response = new WebsocketResponse();
        response.setUserName("群发消息模板测试");
        webSocketServer.sendMassMessage(JSONObject.toJSONString(response));
    }
 
    @Data
    @Accessors(chain = true)
    public static class WebsocketResponse {
        private String userId;
        private String userName;
        private int age;
    }
}

5、在线测试地址

websocket 在线测试

6、测试截图

访问测试发送消息:http://localhost:50041//web/test

测试访问地址:ws://192.168.0.115:50041/webSocket/1   wss://192.168.0.115:50041/webSocket/2

 到此这篇关于SpringBoot实现WebSocket即时通讯的示例代码的文章就介绍到这了,更多相关SpringBoot WebSocket即时通讯内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!

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