Spring Boot统一异常处理方案示例(2)

OrderDTO createResult = orderService.create(orderDTO);
        Map<String,String> map = new HashMap<>();
        map.put("orderId",createResult.getOrderId());

return ResultVOUtil.success(map);

}
    //订单列表
    @GetMapping("/list")
    public ResultVO<List<OrderDTO>> list(@RequestParam("openid") String openid,
                                        @RequestParam(value = "page",defaultValue = "0") Integer page,
                                        @RequestParam(value = "size",defaultValue = "10") Integer size){
        if (StringUtils.isEmpty(openid)){
            log.error("[查询订单列表] openid为空");
            throw new SellException(ResultEnum.PARAM_ERROR);
        }
        PageRequest request = new PageRequest(page, size);
        Page<OrderDTO> orderDTOPage = orderService.findList(openid, request);

return ResultVOUtil.success(orderDTOPage.getContent());
    }

//订单详情
    @GetMapping("/detail")
    public ResultVO<OrderDTO> detail(@RequestParam("openid") String openid,
                                    @RequestParam("orderId") String orderId){

OrderDTO orderDTO = buyerService.findOrderOne(openid, orderId);
        return ResultVOUtil.success(orderDTO);
    }

//取消订单
    @PostMapping("/cancel")
    public ResultVO<OrderDTO> cancel(@RequestParam("openid") String openid,
                                    @RequestParam("orderId") String orderId) {

buyerService.cancelOrderOne(openid, orderId);
        return ResultVOUtil.success();
    }
}

② service处理返回的结果的异常，抛出自定义异常，由handler捕获返回给页面。

@Service
@Slf4j
public class BuyerServiceImpl implements BuyerService {

@Autowired
    private OrderService orderService;

@Override
    public OrderDTO findOrderOne(String openid, String orderId) {
      return checkOrderOwner(openid, orderId);
    }

@Override
    public OrderDTO cancelOrderOne(String openid, String orderId) {
        OrderDTO orderDTO = checkOrderOwner(openid, orderId);
        if (orderDTO == null){
            log.error("[取消订单] 查不到该订单,orderDTO={}",orderId);
            throw new SellException(ResultEnum.ORDER_NOT_EXIST);
        }
        return orderService.cancel(orderDTO);
    }

private OrderDTO checkOrderOwner(String openid, String orderId) {
        OrderDTO orderDTO = orderService.findOne(orderId);
        if (orderDTO == null){
            return null;
        }
        if (!orderDTO.getBuyerOpenid().equalsIgnoreCase(openid)){
            log.error("[查询订单] 订单的openid不一致,openid={},orderDTO={}",openid,orderDTO);
            throw new SellException(ResultEnum.ORDER_OWNER_ERROR);
        }
        return orderDTO;
    }