一、添加WebSocketConfig配置类
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
/**
* 开启WebSocketConfig
* @author: xuyanqi
*/
@Configuration
public class WebSocketConfig {
@Bean
public ServerEndpointExporter serverEndpointExporter(){
return new ServerEndpointExporter();
}
}
二、创建WebSocket服务处理类
import cn.hutool.log.Log;
import cn.hutool.log.LogFactory;
import com.alibaba.fastjson.JSONObject;
import com.elephant.framework.galaxy.travel.response.R;
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;
/**
* 服务处理类
* @author: xuyanqi
*/
@ServerEndpoint("/websocket/{sid}")
@Component
public class WebSocketServer {
static Log log = LogFactory.get(WebSocketServer.class);
//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。
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 用了标识哪个模块的通信
private String sid="";
/**
* 连接建立成功调用的方法*/
@OnOpen
public void onOpen(Session session,@PathParam("sid") String sid) {
this.session = session;
webSocketSet.add(this); //加入set中
addOnlineCount(); //在线数加1
log.info("有新窗口开始监听:"+sid+",当前在线人数为" + getOnlineCount());
this.sid=sid;
try {
sendMessage("连接成功");
} catch (IOException e) {
log.error("websocket IO异常");
e.printStackTrace();
}
}
/**
* 连接关闭调用的方法
*/
@OnClose
public void onClose() {
webSocketSet.remove(this); //从set中删除
subOnlineCount(); //在线数减1
log.info("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) {
log.info("收到来自窗口"+sid+"的信息:"+message);
//群发消息
for (WebSocketServer item : webSocketSet) {
try {
item.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
*
* @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(Object obj) throws IOException {
R r = new R(obj);
this.session.getBasicRemote().sendText(JSONObject.toJSONString(r));
}
/**
* 群发自定义消息
* */
public static void sendInfo(Object obj,@PathParam("sid") String sid) throws IOException {
log.info("推送消息到窗口"+sid+",推送内容:"+obj);
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(obj);
}else if(item.sid.equals(sid)){
item.sendMessage(obj);
}
} 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--;
}
}
三、vue前端
在data中创建websock对象
/**
* 创建websocket
*/
initWebSocket(){
console.log("创建WebSocket")
this.websock = new WebSocket("ws://127.0.0.1:9998/websocket/ydsj")
this.websock.onmessage = this.websocketonmessage
this.websock.onerror = this.websocketonerror
this.websock.onopen = this.websocketonopen
this.websock.onclose = this.websocketclose
},
// 连接建立之后执行send方法发送数据
websocketonopen () {
let data = {
code: 0,
msg: '这是client:初次连接'
}
this.websocketsend(data)
},
websocketonerror () {
console.log( 'WebSocket连接失败')
},
// 数据接收
websocketonmessage (e) {
console.log('数据接收' + e.data)
},
// 数据发送
websocketsend (Data) {
this.websock.send(Data)
},
// 关闭
websocketclose (e) {
console.log('已关闭连接', e)
}