【项目知识点】JSR303自定义校验注解

定义一个校验器：

package com.shop.common.valid;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.HashSet;
import java.util.Set;


public class ListValueConstraintValidator implements ConstraintValidator {

    private Set set = new HashSet<>();


   // 初始化方法
    @Override
    public void initialize(ListValue constraintAnnotation) {
      int[] values = constraintAnnotation.value();
      if (values!=null){
          for (int value : values) {
              set.add(value);
          }
      }

    }


    // 判断是否校验成功

    
    @Override
    public boolean isValid(Integer integer, ConstraintValidatorContext constraintValidatorContext) {
        return set.contains(integer);
    }
}

定义检验注解

package com.shop.common.valid;

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;



@documented
@Constraint(validatedBy = {ListValueConstraintValidator.class})   // 指定校验器，可以指定多个检验器安全屋
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
@Retention(RetentionPolicy.RUNTIME)
public @interface ListValue {

    String message() default "{com.shop.common.valid.ListValue.message}";

    Class[] groups() default {};

    Class[] payload() default {};

    int[] value() default {};
}

编写配置文件ValidationMessages.properties：

com.shop.common.valid.ListValue.message=必须提交指定的值

*实体类字段上添加注解：