Hibernate拦截器中autowired字段的空指针异常（类由Spring管理）

Question

我需要的服务：

@Service
public class CommentServiceImpl implements CommentService {

    private CommentRepository commentRepository;

    private TargetTypeRepository targetTypeRepository;

    @Autowired
    public CommentServiceImpl(final CommentRepository commentRepository, final TargetTypeRepository targetTypeRepository) {
        this.commentRepository = commentRepository;
        this.targetTypeRepository = targetTypeRepository;
    }

    @Override
    public List<Comment> getComments(String targetType, Long targetId) {
        TargetType targetTypeEntity = targetTypeRepository.findByCode(targetType);
        return commentRepository.findByTargetTypeAndTargetId(targetTypeEntity, targetId);
    }

    @Override
    public void deleteComments(String targetType, Long targetId) {
        List<Comment> comments = getComments(targetType, targetId);
        commentRepository.deleteAll(comments);
    }
}

拦截器：

@Component
public class MvaSupportInterceptor extends EmptyInterceptor {

    private static final long serialVersionUID = 1L;

    @Autowired
    private CommentService commentService;

    @Override
    public void onDelete(Object entity, Serializable id, Object[] state,String[] propertyNames, Type[] types)
    {
        if (entity instanceof DraftDoc)
        {
            commentService.deleteComments("DRAFT_DOC", ((DraftDoc)entity).getId()); //NPE
        }
        super.onDelete(entity, id, state, propertyNames, types);
    }
}

配置就是这样：

@SpringBootApplication
public class RestApplication {

    public static void main(String[] args) {
        SpringApplication.run(RestApplication.class, args);
    }
}

Answer 1

原因是以一种注册拦截器的方式：

spring.jpa.properties.hibernate.ejb.interceptor=my.package.MyInterceptorClassName.

它不允许在拦截器内使用bean。

建议的方法对我不起作用，因为我的Spring Boot版本是2.2:
如何在Spring Boot中使用Spring managed Hibernate拦截器？

@Configuration
public class HibernateConfiguration extends HibernateJpaAutoConfiguration{


    @Autowired
    Interceptor userInterceptor;


    @Override
    protected void customizeVendorProperties(Map<String, Object> vendorProperties) {
        vendorProperties.put("hibernate.ejb.interceptor",userInterceptor);
    }
}

@Component
class MyHibernateInterceptorCustomizer implements HibernatePropertiesCustomizer {

    @Autowired
    MyInterceptor myInterceptor

    @Override
    void customize(Map<String, Object> hibernateProperties) {
       hibernateProperties.put("hibernate.session_factory.interceptor", myInterceptor);
    }
}