自定义注解

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;@Target(ElementType.FIELD)
@Documented
@Retention(value = RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {IdExistMyTestValidator.class
})
public @interface IdExistMyTest {//如果出错，返回的数据String message() default "id数据不匹配";boolean required() default false;// 环境区分，一般用<接口.class>来区分Class<?>[] groups() default {};Class<? extends Payload>[] payload() default {};}

service相关自定义校验父类

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.lang.annotation.Annotation;
import java.util.Objects;
import java.util.function.Predicate;@Slf4j
public class MyTestValidator<A extends Annotation,T> implements ConstraintValidator<A, T> {// 是否强制校验protected boolean required;// 默认值直接通过protected Predicate<T> isValidFunc = t -> true;@Autowiredprotected IMyTestService service;//进行校验的逻辑判断@Overridepublic boolean isValid(T t, ConstraintValidatorContext constraintValidatorContext) {if(!required && Objects.isNull(t)){return true;}return isValidFunc.test(t);}
}

自定义校验具体实现

public class IdExistMyTestValidator extends MyTestValidator<IdExistMyTest,String>{//初始化传入的是注解//进行校验的逻辑判断@Overridepublic void initialize(IdExistMyTest constraintAnnotation) {// t接收的参数isValidFunc = t ->{final long count = service.count(new LambdaQueryWrapper<MyTest>().eq(MyTest::getTestId, t));return count != 0;};this.required = constraintAnnotation.required();super.initialize(constraintAnnotation);}
}

自定义注解对象里使用

MyTestRO

    /** 主键 */@ApiModelProperty(value = "主键" )@NotEmpty(message = "主键不为空")@IdExistMyTest(groups =GroupA.class )@Length(max = 32,message = "主键长度不超过32")private String testId;public interface GroupA {}public interface GroupB {}// 组序列 ,简单控制校验顺序@GroupSequence({Default.class, GroupA.class, GroupB.class})public interface Group {}

POST请求调用自定义校验

@RequestBody @Validated(MyTestRO.Group.class)