java - 没有可用的 'ru.spb.repository.UserRepository' 类型的合格 bean : expected at least 1 bean which qualifies as autowire candidate

Question

存储库类:

 package ru.spb.repository.user;

@Repository
public class AnketUserRepository implements UserRepository {

     @Autowired
     private CrudUserRepository crudRepository;

 }

界面:

package ru.spb.repository;

public interface UserRepository {
}

服务:

package ru.spb.service;

@Service
public class UserService {

   private final UserRepository repository;

   @Autowired
   public UserService (UserRepository repository){
       this.repository = repository;
   }
}

配置: 在 spring-app.xml 中:

 <context:component-scan base-package="ru.spb.service"/> 

在 spring-db.xml 中:

 <context:component-scan base-package="ru.spb.repository.user"/>

但是我发现了以下异常:

 NoSuchBeanDefinitionException: No qualifying bean of type 'ru.spb.repository.UserRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}

我尝试在 UserRepository 接口(interface)上添加@Repository，但没有成功。

Answer 1

您还需要对界面进行注释

package ru.spb.repository;

@Repository
public interface UserRepository {
}