feats

src/main/java/com/huiju/estateagents/websocket/ChatServer.java

     @OnMessage
     public void onMessage(String message, Session session) {
         // 心跳
-        if ("ping" == message) {
+        if ("ping".equals(message)) {
             try {
                 this.sendMessage("pong");
             } catch (IOException e) {