hibernate-validator分组校验,去除冗余代码

根据groups来指定需要校验的字段

class StudentRequest{

    @NotNull(message = "id不能为空!",groups = {AddGroup.class})
	Integer id;
	@NotBlank(message = "姓名不能为空",groups = {AddGroup.class,UpdateGroup.class})
	String name;
	
	public interface Update{}  
    public interface Add{}
}

//添加分组
public interface AddGroup {
}

//更新分组
public interface UpdateGroup {
}

在做更新时,校验如下: ValidatorUtils.validateEntity(gatherForm, Update.class);

在做新增时,校验如下 ValidatorUtils.validateEntity(gatherForm, Add.class);

ValidatorUtils 校验工具代码****

/**
 * hibernate-validator校验工具类
 *
 * 参考文档：http://docs.jboss.org/hibernate/validator/5.4/reference/en-US/html_single/
 *
 * @author Mark sunlightcs@gmail.com
 */
public class ValidatorUtils {
    private static Validator validator;

    static {
        validator = Validation.buildDefaultValidatorFactory().getValidator();
    }

    /**
     * 校验对象
     * @param object        待校验对象
     * @param groups        待校验的组
     * @throws RRException  校验不通过，则报RRException异常
     */
    public static void validateEntity(Object object, Class<?>... groups)
            throws RRException {
        Set<ConstraintViolation<Object>> constraintViolations = validator.validate(object, groups);
        if (!constraintViolations.isEmpty()) {
            StringBuilder msg = new StringBuilder();
            for(ConstraintViolation<Object> constraint:  constraintViolations){
                msg.append(constraint.getMessage()).append("<br>");
            }
            throw new RRException(msg.toString());
        }
    }
}

==========这样做的好处可以只与一个实体,做两种不同校验==========