java - Spring 错误 : BeanNotOfRequiredTypeException

Question

我的 Controller 包含以下注释:

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

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:

Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'userDetailsServiceImpl' must be of type [myapp.service.UserDetailsServiceImpl], but was actually of type [$Proxy19]

Answer 1

应该是

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

Spring使用接口(interface)类型进行依赖注入(inject)，而不是实现类型