spring的校验框架 @Validated & BindingResult

controller上写法类似这样：

   @RequestMapping(value = "saleInfoList.json", method = RequestMethod.GET)
    @ResponseBody
    public ApiResult saleInfoList(@Validated CustomerDataParam param, BindingResult bindingResult) {
        if (bindingResult.hasErrors()) {
            return ApiResult.fail(bindingResult.getFieldError().getDefaultMessage());
        }

CustomerDataParam的写法是如下模样

public class CustomerDataParam extends PrintableBean implements Serializable {

    private static final long serialVersionUID = 8765907263903227625L;

    /**
     * 门店num
     */
    @NotNull(message = "门店num不能为空")
    private String num;

    /**
     * 查询开始日期
     */
    @NotNull(message = "开始日期不能为空")
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date beginDate;

    /**
     * 查询结束日期
     */
    @NotNull(message = "结束日期不能为空")
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date endDate;

    /**
     * 指标id
     *
     * @see com.qunar.xx.enums.xx
     */
    @Min(value = 1, message = "指标id不合法")
    @Max(value = 8, message = "指标id不合法")
    private Integer metricId;

那么在对应的字段出现指定的出错时会有相应的提示