还是继续上一篇stomp的问题，这次是在实际使用中又有了新发现，那就是java后端向前端发送stomp消息时，存在底层异步操作造成的消息顺序不确定性问题，如下：
@Autowired
SimpMessageSendingOperations messagingTemplate;
@MessageMapping("/create")
@SendToUser("/queue/reply")
public ReplyDTO create(@Payload CreateDTO msg, SimpMessageHeaderAccessor accessor) throws Exception {
String userId = getUserId(accessor);
if (userId.isEmpty())
return buildNotLoggedInReply(accessor);
int createId = myService.create(userId, msg.getTypeName());
CreateInfo ci = myService.info(createId);
String infoStr = new ObjectMapper().writeValueAsString(ci);
messagingTemplate.convertAndSendToUser(
Objects.requireNonNull(accessor.getSessionId()),
"/queue/response",
buildOkResp(accessor),
createHeaders(accessor.getSessionId())
);
return buildReply(accessor, infoStr);
}