在休眠约束验证器中自动装配返回空异常

Question

环顾四周，我找不到任何好的解决方案。

我的 autowired 没有按预期工作，它返回 null。我已经在其他类中自动装配了这个特定的类，它可以工作，所以它只在约束验证器类中不起作用。

错误

java.lang.IllegalStateException：无法执行 CommandLineRunner 在 org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:798) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE] 在 org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:779) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE] 在 org.springframework.boot.SpringApplication.run(SpringApplication.java:322) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE] 在 org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE] 在 org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE] 在 com.Alex.Mains.JpaApplication.main(JpaApplication.java:21) ~[classes/:na] 原因： org.springframework.transaction.TransactionSystemException：不能 提交 JPA 事务；嵌套异常是 javax.persistence.RollbackException：提交时出错 交易于 org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:543) ~[spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:632) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:386) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:118) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:178) ~[spring-data-jpa-2.3.1.RELEASE.jar:2.3.1.RELEASE] 在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE] 在 com.sun.proxy.$Proxy93.save(Unknown Source) ~[na:na] at com.Alex.Mains.UserRepositoryCommandLineRunner.run(UserRepositoryCommandLineRunner.java:26) 〜[类/：na]在 org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:795) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE] ... 5个常用框架 省略原因：javax.persistence.RollbackException: Error while 提交交易 org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:81) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:104) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:534) ~[spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE] ... 21个常用框架 省略引起：javax.validation.ValidationException：HV000028： isValid 调用期间出现意外异常。在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:186) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.constraintvalidation.SimpleConstraintTree.validateConstraints(SimpleConstraintTree.java:62) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:75) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.metadata.core.MetaConstraint.doValidateConstraint(MetaConstraint.java:130) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:123) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:555) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:518) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:488) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:450) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:400) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:172) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:116) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:80) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.action.internal.EntityInsertAction.preInsert(EntityInsertAction.java:227) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:100) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:723) ~[na:na] 在 org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:475) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:348) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:40) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:102) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1360) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:451) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3210) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2378) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:447) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] 在 org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final] ... 22个常用帧 省略引起：java.lang.NullPointerException: null at com.Alex.Validations.EmailValidator.isValid(EmailValidator.java:26) 〜[类/：na]在 com.Alex.Validations.EmailValidator.isValid(EmailValidator.java:1) 〜[类/：na]在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:180) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]

用户服务类

@Service
public class UserService {

    @Autowired
    private UserRepository userRep;
    
    public void addUser(User user) {
        userRep.save(user);
    }
    
    
    public void deleteUser(long userId) {
        userRep.deleteById(userId);
    }
    
    public List<User> retrieveAllUsers(){
        Iterable<User>temp =userRep.findAll();
        List<User>allUsers = null;
        temp.forEach(allUsers::add);
        return allUsers;
    }
    
    public boolean searchByEmail(String email) {
        return userRep.findByEmail(email);
    }
    
    public void updateUser(User user) {
        userRep.save(user);
    }
}

注解接口类

 @Target(ElementType.FIELD) 
    //When will the annotation be processed compilation, runtime etc
    @Retention(RetentionPolicy.RUNTIME)
    //Where is the logic
    @Constraint(validatedBy = EmailValidator.class)
    @Documented
    public @interface ValidEmail {
        
        //Error message
        String message() default "Invalid email";
        //Required for annotation
        Class<?>[] groups() default {};
        Class<? extends Payload>[] payload() default {};
        
    }

注解逻辑类

public class EmailValidator implements ConstraintValidator<ValidEmail, String> {

    @Autowired
    private UserService service;
    //Actual place to place the logic to check if the data is valid or not
    @Override
    public boolean isValid(String email, ConstraintValidatorContext context) {
        if (email == null) {
        return false;
        }
        
        List<User> users = service.retrieveAllUsers();
        if (users.size() > 0) { 
        return Pattern.matches("(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])", email)
                && service.searchByEmail(email);
        }
        
        else {
            return Pattern.matches("(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])", email);
        }
        }
        
    
    
    @Override
    public void initialize(ValidEmail validEmail) {
        validEmail.message();
    }

}

主要

@SpringBootApplication
@ComponentScan(basePackages = {
        "com.Alex.Mains", "com.Alex.UserPackage", "com.Alex.Flights", "com.Alex.Security"
})
@EntityScan( basePackages = {"com.Alex.UserPackage", "com.Alex.Flights"})
@EnableJpaRepositories({"com.Alex.UserPackage", "com.Alex.Flights"})
public class JpaApplication {

    public static void main(String[] args) {
        SpringApplication.run(JpaApplication.class, args);
    }
    
//  @Bean
//  public Validator validator(final AutowireCapableBeanFactory beanFactory) {
//
//      ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
//              .configure()
//              .constraintValidatorFactory(new SpringConstraintValidatorFactory(beanFactory))
//              .buildValidatorFactory();
//
//      return validatorFactory.getValidator();
//  }
    
}

Answer 1

Hibernate 正在调用验证，默认情况下它对 Spring 一无所知，因此 @Autowired 构造型不会被尊重。

如果你想在那里使用 Spring，你需要配置 Hibernate 才能正确解析依赖注入。

我无法确定，因为您尚未共享我们可以运行的示例，但请尝试添加以下配置：

@Configuration
class HibernateCustomization {

    @Bean
    public HibernatePropertiesCustomizer hibernatePropertiesCustomizer(ValidatorFactory validatorFactory) {
        return (properties) -> {
            properties.put(org.hibernate.cfg.AvailableSettings.JPA_VALIDATION_FACTORY, validatorFactory);
        };
    }
}