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环顾四周后，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

TransactionSystemException：无法提交 JPA 事务；嵌套异常是 javax.persistence.RollbackException: Error while committing the transaction at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:543) ~[spring-orm-5.2.7.RELEASE.jar:5.2.7 .RELEASE] at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] at org.springframework.transaction.support .AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:632) ~[spring-tx-5.2.7.RELEASE.jar:5.2.7.RELEASE] at org。省略 21 个常见帧 原因：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] at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree .validateConstraints(ConstraintTree.java:75) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] at org.hibernate.validator.internal.metadata.core.MetaConstraint.doValidateConstraint(MetaConstraint.java: 130) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final] 在 org.

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();
    }

}

主要的

@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();
//  }
    
}

在此处输入图像描述

4

1 回答 1

1

Hibernate 正在调用验证，默认情况下它对 Spring 一无所知，因此@Autowired不会尊重原型。

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，因为您没有共享我们可以运行的示例，但尝试添加以下配置：

@Configuration
class HibernateCustomization {

    @Bean
    public HibernatePropertiesCustomizer hibernatePropertiesCustomizer(ValidatorFactory validatorFactory) {
        return (properties) -> {
            properties.put(org.hibernate.cfg.AvailableSettings.JPA_VALIDATION_FACTORY, validatorFactory);
        };
    }
}
于 2020-08-04T16:27:36.880 回答