service层对 @NotBlank注解起作用

1：在实体类上加上注解

/**
     * 产品名称
     */
    @TableField("product_name")
    @NotBlank
    private String productName;

2：service的校验方法

@Override
    public void validationOrderRelationshipNotice(OrderRelationshipNotice orderRelationshipNotice) throws ValidationException{
        //校验参数是否为空
        Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
        Set<ConstraintViolation<OrderRelationshipNotice>> constraintViolations = validator.validate(orderRelationshipNotice);
        List<ConstraintViolation<OrderRelationshipNotice>> list = new ArrayList(constraintViolations);
        if (!CollectionUtils.isEmpty(list)) {
            ConstraintViolation<OrderRelationshipNotice> constraintViolation = list.get(0);
            if (constraintViolation != null) {
                throw new ValidationException(constraintViolation.getMessage());
            }
        }
    }