自定义hibernate后端参数验证注解

想验证前端传入对象的Integer属性

1.新建一个注解类 @FlagValidator

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import javax.validation.Constraint; import javax.validation.Payload; import java.lang.annotation.*;   /**  * 用户验证状态是否在指定范围内的注解  */ @Documented @Retention(RetentionPolicy.RUNTIME) @Target({ElementType.FIELD,ElementType.PARAMETER}) @Constraint(validatedBy = FlagValidatorClass.class) public @interface FlagValidator {     String[] value() default {};       String message() default "flag is not found";       Class<?>[] groups() default {};       Class<? extends Payload>[] payload() default {}; }

2.新建一个类继承实现ConstraintValidator

 

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import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext;   /**  * @Description TODO  * @Author xjy  * @Date 2019/9/29  */ public class FlagValidatorClass implements ConstraintValidator<FlagValidator, Integer> {       private String[] values;       @Override     public void initialize(FlagValidator flagValidator) {         values = flagValidator.value();     } 　　　//下面的判断逻辑,values是注解里面的值， value 是属性的值     @Override     public boolean isValid(Integer value, ConstraintValidatorContext constraintValidatorContext) {         boolean isValid = false;         if (value == null){             return true;         }         for (int i = 0; i < values.length; i++) {             if (values[i].equals(String.valueOf(value))){                 isValid = true;                 break;             }         }         return isValid;     } }

3.使用

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1 2	@FlagValidator(value = {"1", "5"}, message = "请输入正确的状态") private Integer status = 1;