javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 解决方法
在使用hibernate validator进行参数有效性校验的时候,我们有时候会遇到javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint ,比如,在我们的应用中,使用了自定义注解Dict对枚举进行有效性校验,因为定义的Dict应用于String类型,例如:
package com.yidoo.base.metadata.validate; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import javax.validation.Constraint; import javax.validation.Payload; @Target({ElementType.FIELD}) @Retention(value = RetentionPolicy.RUNTIME) @Constraint(validatedBy = { DictValidator.class }) @Documented public @interface Dict { /** * 数据字典的标准名称, 驼峰式或者下划线分隔都可以 * @return */ String dictName(); /** * 表示验证数据字典有效性的范围为明确指定的字段名。<br /> * 用于一些特殊场景, 比如订单状态中有作废, 但是这些有效性我们不希望业务订单明确传递这个值, <br /> * 所以要过滤掉, 适用于重用数据字典, 但是取值范围为子集的情况。 * 默认为空,表示所有子项目都有效。相当于除非声明某些有效,否则全部有效。 * @return */ String fieldName() default ""; String message() default "{数据字典取值不合法,请参考标准数据字典管理}"; Class<?>[] groups() default {}; Class<? extends Payload>[] payload() default {}; }
package com.yidoo.base.metadata.validate; import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext; import com.yidoo.base.metadata.cons.DictUtils; public class DictValidator implements ConstraintValidator<Dict, String> { private String dictName; @Override public void initialize(Dict dictAnno) { this.dictName = dictAnno.dictName(); } @Override public boolean isValid(String value, ConstraintValidatorContext context) { if (DictUtils.isValid(dictName, value)) { return true; } context.disableDefaultConstraintViolation(); context.buildConstraintViolationWithTemplate("该字段的当前值" + value + "不在数据字典" + dictName + "的有效取值范围内, 有效值为:[" + DictUtils.getDictKeys(dictName) + "]").addConstraintViolation(); return false; } }
在如下校验中就会失败:
@NotNull @ValidServices(services = IOperatorService.SAVE) @Dict(dictName="bool_int") private Integer loginFlag;
如下:
javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint ‘com.yidoo.base.metadata.validate.Dict‘ validating type ‘java.lang.Integer‘. Check configuration for ‘firstTimeFlag‘ at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.throwExceptionForNullValidator(ConstraintTree.java:228) at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorNoUnwrapping(ConstraintTree.java:309) at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorInstanceForAutomaticUnwrapping(ConstraintTree.java:243) at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getInitializedConstraintValidator(ConstraintTree.java:164) at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:109) at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:88) at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73) at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:617) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:582) at org.hibernate.validator.internal.engine.ValidatorImpl.validatePropertyForSingleDefaultGroupElement(ValidatorImpl.java:1051) at org.hibernate.validator.internal.engine.ValidatorImpl.validatePropertyForDefaultGroup(ValidatorImpl.java:1019) at org.hibernate.validator.internal.engine.ValidatorImpl.validatePropertyForCurrentGroup(ValidatorImpl.java:936) at org.hibernate.validator.internal.engine.ValidatorImpl.validatePropertyInContext(ValidatorImpl.java:824) at org.hibernate.validator.internal.engine.ValidatorImpl.validateProperty(ValidatorImpl.java:223) at com.yidoo.utils.ValidationUtils.validatePropertyInternal(ValidationUtils.java:56) at com.yidoo.utils.ValidationUtils.validateEntityByServiceId(ValidationUtils.java:99) at com.yidoo.utils.LfValidUtil.newValid(LfValidUtil.java:37) at com.yidoo.k3c.base.service.ClientService.insert(ClientService.java:129)
当遇到有些设计,取值为布尔类型,0代表false,1代表true的时候,采用了Integer类型,使用Dict注解的时候就会出现上述错误,对于该异常,原因是Dict的校验器参数String不匹配Integer,要解决该异常,我们可以再定义一个针对Integer有效性校验的IntDict,如下所示:
package com.yidoo.base.metadata.validate; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import javax.validation.Constraint; import javax.validation.Payload; @Target({ElementType.FIELD}) @Retention(value = RetentionPolicy.RUNTIME) @Constraint(validatedBy = { IntDictValidator.class }) @Documented public @interface IntDict { /** * 数据字典的标准名称, 驼峰式或者下划线分隔都可以 * @return */ String dictName(); /** * 表示验证数据字典有效性的范围为明确指定的字段名。<br /> * 用于一些特殊场景, 比如订单状态中有作废, 但是这些有效性我们不希望业务订单明确传递这个值, <br /> * 所以要过滤掉, 适用于重用数据字典, 但是取值范围为子集的情况。 * 默认为空,表示所有子项目都有效。相当于除非声明某些有效,否则全部有效。 * @return */ String fieldName() default ""; String message() default "{数据字典取值不合法,请参考标准数据字典管理}"; Class<?>[] groups() default {}; Class<? extends Payload>[] payload() default {}; }
package com.yidoo.base.metadata.validate; import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext; import com.yidoo.base.metadata.cons.DictUtils; public class IntDictValidator implements ConstraintValidator<IntDict, Integer> { private String dictName; @Override public void initialize(IntDict dictAnno) { this.dictName = dictAnno.dictName(); } @Override public boolean isValid(Integer value, ConstraintValidatorContext context) { if (DictUtils.isValid(dictName, String.valueOf(value))) { return true; } context.disableDefaultConstraintViolation(); context.buildConstraintViolationWithTemplate("该字段的当前值" + value + "不在数据字典" + dictName + "的有效取值范围内, 有效值为:[" + DictUtils.getDictKeys(dictName) + "]").addConstraintViolation(); return false; } }
注:为什么不直接采用正则校验呢?因为对于很多枚举类型来说,取值范围是业务随机定义的,此时可能依赖于常量、枚举类甚至动态加载到缓存的定义进行校验(看不同系统的设计约定和规范)。
文章来自:https://www.cnblogs.com/zhjh256/p/9160473.html