SpringBoot实现WebSocket即时通讯的示例代码

目录

• 1、引入依赖
• 2、WebSocketConfig 开启WebSocket
• 3、WebSocketServer
• 4、测试连接发送和接收消息
• 5、在线测试地址
• 6、测试截图

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;

/**
 * @author tqf
 * @Description
 * @Version 1.0
 * @since 2022-04-12 15:35
 */
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

/**
 * 开启WebSocket
 */
@Configuration
public class WebSocketConfig {
    @Bean
    public ServerEndpointExporter serverEndpointExporter(){
        return new ServerEndpointExporter();
    }
}
 

3、WebSocketServer

package com.shucha.deveiface.web.ws;

/**
 * @author tqf
 * @Description
 * @Version 1.0
 * @since 2022-04-12 15:33
 */
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;
    /**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;
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<>();

    /**
     * concurrent包的线程安全set，用来存放每个客户端对应的MyWebSocket对象
     */
    private static ConcurrentHashMap<String,WebSocketServer> webSocketMap = new ConcurrentHashMap();

    /**
     * 为了保存在线用户信息，在方法中新建一个list存储一下【实际项目依据复杂度，可以存储到数据库或者缓存】
     */
    private final static List<Session> SESSIONS = Collections.synchronizedList(new ArrayList<>());

    /**
     * 建立连接
     * @param session
     * @param userId
     */
    @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());
    }

    /**
     * 断开连接
     */
    @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());
    }

    /**
     * 发送错误
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.info("[连接ID:{}] 错误原因:{}", this.userId, error.getMessage());
        error.printStackTrace();
    }

    /**
     * 收到消息
     * @param message
     */
    @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);
    }

    /**
     * 发送消息
     * @param message
     * @param userId
     */
    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);
            }
        }
    }

    /**
     * 群发消息
     * @param message
     */
    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();
        }
    }

    /**
     * 获取当前连接数
     * @return
     */
    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    /**
     * 当前连接数加一
     */
    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    /**
     * 当前连接数减一
     */
    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;

/**
 * @author tqf
 * @Description
 * @Version 1.0
 * @since 2022-04-12 15:44
 */
@RestController
@RequestMapping("/web")
public class TestWebSocket {
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 消息发送测试
     */
    @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)));
        }
    }

    /**
     * 群发消息测试(给当前连接用户发送)
     */
    @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我们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我们！