/** 消息处理,在客户端通过Websocket API发送的消息会经过这里,然后进行相应的处理 */
 public void handleMessage(WebSocketSession session, WebSocketMessage<?> message)
     throws Exception {
   if (message.getPayloadLength() == 0) return;
   Message msg = new Gson().fromJson(message.getPayload().toString(), Message.class);
   msg.setDate(new Date());
   sendMessageToUser(
       msg.getTo(),
       new TextMessage(
           new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create().toJson(msg)));
 }
  @Test
  public void handleMessageToClientConnected() {

    UserSessionRegistry registry = new DefaultUserSessionRegistry();
    this.protocolHandler.setUserSessionRegistry(registry);

    StompHeaderAccessor headers = StompHeaderAccessor.create(StompCommand.CONNECTED);
    Message<byte[]> message = MessageBuilder.withPayload(new byte[0]).setHeaders(headers).build();
    this.protocolHandler.handleMessageToClient(this.session, message);

    assertEquals(1, this.session.getSentMessages().size());
    WebSocketMessage<?> textMessage = this.session.getSentMessages().get(0);
    assertEquals("CONNECTED\n" + "user-name:joe\n" + "\n" + "\u0000", textMessage.getPayload());

    assertEquals(Collections.singleton("s1"), registry.getSessionIds("joe"));
  }
 /** 处理会话 */
 @Override
 public void handleMessage(WebSocketSession session, WebSocketMessage<?> message)
     throws Exception {
   // TODO Auto-generated method stub
   Map<String, String> select = JsonUtil.jsonToMap(message.getPayload().toString());
   String result = webSocketService.getNewMessage(select);
   session.sendMessage(new TextMessage(result.toString()));
   WebSocketCache.putMemberSession(select.get("userId"), session);
 }