Spring错误:BeanNotOfRequiredTypeException

Question

我的控制器包含以下注释:

@Resource(name="userService")
private UserDetailsServiceImpl userService;

并且服务本身具有以下内容:

@Service("userService")
@Transactional
public class UserDetailsServiceImpl implements UserDetailsService {

    @Resource(name = "sessionFactory")
    private SessionFactory sessionFactory;

但是我在启动时收到以下错误:

注入资源依赖性失败; 嵌套异常是org.springframework.beans.factory.BeanNotOfRequiredTypeException:名为'userDetailsS​​erviceImpl'的bean必须是[myapp.service.UserDetailsS​​erviceImpl]类型,但实际上是[$ Proxy19]类型

Answer 1

它应该是

@Resource(name="userService")
private UserDetailsService userService;

Spring使用接口类型来进行依赖注入,而不是实现类型