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

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

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

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