Question

My controller contains the following annotation :

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

and the service itself has the following :

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

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

However I receive the following error on startup :

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

It should be

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

Spring uses the interface type to make dependency injection, not the implementation type