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 |  | package com.yihu.jw.care.endpoint;
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 |  | import com.alibaba.fastjson.JSONObject;
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 |  | import org.apache.commons.lang.StringUtils;
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 |  | import org.slf4j.Logger;
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 |  | import org.slf4j.LoggerFactory;
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 |  | import org.springframework.stereotype.Component;
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 |  | import javax.annotation.PostConstruct;
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 |  | import javax.websocket.*;
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 |  | import javax.websocket.server.PathParam;
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 |  | import javax.websocket.server.ServerEndpoint;
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 |  | import java.io.IOException;
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 |  | import java.util.concurrent.ConcurrentHashMap;
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															|  | 
 |  | import com.alibaba.fastjson.JSON;
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															|  | 
 |  | /***
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															|  | 
 |  |  * @ClassName: WebSocketServer
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															|  | 
 |  |  * @Description:
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															|  | 
 |  |  * @Auther: shi kejing
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															|  | 
 |  |  * @Date: 2021/8/20 14:20
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															|  | 
 |  |  */
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															|  | 
 |  | @ServerEndpoint("/imserver/{userId}")
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															|  | 
 |  | @Component
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 |  | public class WebSocketServer {
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 |  |     private final static Logger log = LoggerFactory.getLogger(WebSocketServer.class);
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															|  | 
 |  |     /**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。*/
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 |  |     private static int onlineCount = 0;
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															|  | 
 |  |     /**concurrent包的线程安全Set,用来存放每个客户端对应的MyWebSocket对象。*/
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															|  | 
 |  |     private static ConcurrentHashMap<String,WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
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															|  | 
 |  |     /**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*/
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 |  |     private Session session;
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															|  | 
 |  |     /**接收userId*/
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 |  |     private String userId="";
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															|  | 
 |  |     /**
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															|  | 
 |  |      * 连接建立成功调用的方法*/
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															|  | 
 |  |     @OnOpen
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 |  |     public void onOpen(Session session,@PathParam("userId") String userId) {
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 |  |         log.info("userId = "+userId);
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 |  |         this.session = session;
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 |  |         this.userId=userId;
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 |  |         if(webSocketMap.containsKey(userId)){
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 |  |             webSocketMap.remove(userId);
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 |  |             webSocketMap.put(userId,this);
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															|  | 
 |  |             //加入set中
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 |  |         }else{
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 |  |             webSocketMap.put(userId,this);
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 |  |             //加入set中
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 |  |             addOnlineCount();
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 |  |             //在线数加1
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 |  |         }
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 |  |         log.info("用户连接:"+userId+",当前在线人数为:" + getOnlineCount());
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 |  |         try {
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 |  |             sendMessage("连接成功");
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 |  |         } catch (IOException e) {
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 |  |             log.error("用户:"+userId+",网络异常!!!!!!");
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 |  |         }
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 |  |     }
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															|  | 
 |  |     /**
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															|  | 
 |  |      * 连接关闭调用的方法
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 |  |      */
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 |  |     @OnClose
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 |  |     public void onClose() {
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 |  |         if(webSocketMap.containsKey(userId)){
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 |  |             webSocketMap.remove(userId);
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															|  | 
 |  |             //从set中删除
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 |  |             subOnlineCount();
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 |  |         }
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 |  |         log.info("用户退出:"+userId+",当前在线人数为:" + getOnlineCount());
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 |  |     }
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 |  | 
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															|  | 
 |  |     /**
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															|  | 
 |  |      * 收到客户端消息后调用的方法
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															|  | 
 |  |      *
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 |  |      * @param message 客户端发送过来的消息*/
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 |  |     @OnMessage
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 |  |     public void onMessage(String message, Session session) {
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 |  |         log.info("用户消息:"+userId+",报文:"+message);
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															|  | 
 |  |         //可以群发消息
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															|  | 
 |  |         //消息保存到数据库、redis
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															|  | 
 |  |         if(StringUtils.isNotBlank(message)){
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															|  | 
 |  |             try {
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															|  | 
 |  |                 //解析发送的报文
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 |  |                 JSONObject jsonObject = JSON.parseObject(message);
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															|  | 
 |  |                 //追加发送人(防止串改)
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 |  |                 jsonObject.put("fromUserId",this.userId);
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															|  | 
 |  |                 String toUserId=jsonObject.getString("toUserId");
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															|  | 
 |  |                 //传送给对应toUserId用户的websocket
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 |  |                 if(StringUtils.isNotBlank(toUserId)&&webSocketMap.containsKey(toUserId)){
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 |  |                     webSocketMap.get(toUserId).sendMessage(jsonObject.toJSONString());
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 |  |                 }else{
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 |  |                     log.error("请求的userId:"+toUserId+"不在该服务器上");
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															|  | 
 |  |                     //否则不在这个服务器上,发送到mysql或者redis
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 |  |                 }
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 |  |             }catch (Exception e){
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 |  |                 e.printStackTrace();
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 |  |             }
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 |  |         }
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															|  | 
 |  |     }
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															|  | 
 |  |     /**
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															|  | 
 |  |      *
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															|  | 
 |  |      * @param session
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															|  | 
 |  |      * @param error
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 |  |      */
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															|  | 
 |  |     @OnError
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 |  |     public void onError(Session session, Throwable error) {
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 |  |         log.error("用户错误:"+this.userId+",原因:"+error.getMessage());
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 |  |         error.printStackTrace();
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 |  |     }
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															|  | 
 |  |     /**
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															|  | 
 |  |      * 实现服务器主动推送
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 |  |      */
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 |  |     public void sendMessage(String message) throws IOException {
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 |  |         this.session.getBasicRemote().sendText(message);
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 |  |     }
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															|  | 
 |  |     /**
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															|  | 
 |  |      * 发送自定义消息
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															|  | 
 |  |      * */
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 |  |     public static void sendInfo(String message,@PathParam("userId") String userId) throws IOException {
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 |  |         log.info("发送消息到:"+userId+",报文:"+message);
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 |  |         if(StringUtils.isNotBlank(userId)&&webSocketMap.containsKey(userId)){
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 |  |             webSocketMap.get(userId).sendMessage(message);
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 |  |         }else{
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 |  |             log.error("用户"+userId+",不在线!");
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 |  |         }
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 |  |     }
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 |  |     public static synchronized int getOnlineCount() {
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 |  |         return onlineCount;
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 |  |     }
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 |  |     public static synchronized void addOnlineCount() {
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 |  |         WebSocketServer.onlineCount++;
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 |  |     }
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 |  |     public static synchronized void subOnlineCount() {
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 |  |         WebSocketServer.onlineCount--;
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 |  |     }
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															|  | 
 |  | }
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