controller层

@GetMapping("/reminder/{id}")public Result Remainder(@PathVariable("id") Long id){orderService.remainder(id);return Result.success();}

实现类

    @Overridepublic void remainder(Long id) {Orders ordersDB = orderMapper.getById(id);// 校验订单是否存在，并且状态为4if (ordersDB == null) {throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);}HashMap map = new HashMap();map.put("type",2);map.put("orderId",id);map.put("content","订单号" + ordersDB.getNumber());webSocketServer.sendToAllClient(JSON.toJSONString(map));}