定义注解

package com.sgcc.dls.imnotice.exam;

import javax.validation.Constraint;
import javax.validation.ConstraintValidator;
import javax.validation.Payload;
import javax.validation.constraints.Size;
import java.lang.annotation.Documented;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE})
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = {})
public @interface IDCardValidator{
    String message();

    Class<?>[] groups() default { };

    Class<? extends Payload>[] payload() default { };
}

注解的实现类

package com.sgcc.dls.imnotice.exam;

import org.springframework.util.StringUtils;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
/**
 *  @title IDCardConstraintValidator
 *  @Description 描述 自定义注解
 *  @author zhangqiang
 *  @Date 2019年07月09日 14:30
 *  @Copyright 2019-2020 www.epri.sgcc.com.cn All rights reserved.
 */
public class IDCardConstraintValidator implements ConstraintValidator<IDCardValidator,String> {

    @Override
    public void initialize(IDCardValidator constraintAnnotation) {

    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        String[] strings = StringUtils.delimitedListToStringArray(value, "-");
        if(strings.length!=2){
            return false;
        }else{
            return true;
        }
    }
}