关于订单号的问题

@RequestMapping("/checkNum") @ResponseBody @Transactional(rollbackFor = MyException.class) public R checkTranNum(String token,String uid,String tranNum,String amount)throws MyException{ List<A> a=aService.getTranRecord(tranNum); if(tranRecord==null){ throw new MyException("订单号不存在"); } if(tranRecord.get(0).getTranstatus()==2){ return R.error("订单号已经失效"); } try {//将当下请求的订单号，设为自定义的失效的状态，在同一个订单在请求的时候就会return 订单号失效 aRecordService.updateTranStatus(tranNum,"2"); }catch (Exception e){ throw new MyException("更新流水号状态异常"); } /*可以添加一些自己需要的逻辑*/ Map<String,Object> map=new HashMap<>(); // map.put("memberExpirationTime",memberExpirationTime.getTime()); return R.success("订单号验证成功",1,map); } @RequestMapping("/checkNum") @ResponseBody @Tra