SpringValidation自定义注解及分组校验功能详解

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-validation</artifactId>
   <version>3.2.0</version>
</dependency>

import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;
/**
 * ConstraintValidator<State, String>前一个代表需要校验的注解，后一个代表校验类型
 */
public class Validation implements ConstraintValidator<State, String> {
    /**
     *
     * @param value 将来要校验的数据
     * @param constraintValidatorContext
     * @return
     */
    @Override
    public boolean isValid(String value, ConstraintValidatorContext constraintValidatorContext) {
        //校验规则
        if (value == null) {
            return false;
        }
        if (value.equals("已发布") || value.equals("草稿")) {
            return true;
        }
        return false;
    }
}

import jakarta.validation.Constraint;
import jakarta.validation.Payload;
import java.lang.annotation.*;
@Documented //元注解，代表可在文档显示
@Constraint(
        validatedBy = {Validation.class} //指定提供校验规则的类,该类需要自己指定
)
//元注解，代表注解适用的对象（方法、字段、注解、类、属性）
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
@Retention(RetentionPolicy.RUNTIME) //元注解，代表注解的作用范围
public @interface State {
    //报错提示
    String message() default "state参数只能是已发布或者草稿";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}