Controller类中的@AutoWired服务bean将无法识别

Question

@Service
public class UserDetailsServiceImpl implements UserDetailsService {


@Autowired
private UserRepository userRepository;
@Autowired
private BCryptPasswordEncoder passwordEncoder;
@Autowired
private EntityManager entityManager;

    @Override
    public UserDetails loadUserByUsername( String username) throws UsernameNotFoundException {
        Optional<User> userOptional = userRepository.findUserByUsername(username);
        User user = userOptional.orElseThrow(
                ()->new UsernameNotFoundException("Username not found in the database")
        );
        return new MyUserDetails(user);
    }
    

 public void saveUser(User user){

User newUser=new User();
newUser.setUsername(user.getUsername());
newUser.setPassword(passwordEncoder.encode(user.getPassword()));
newUser.setEnabled(true);
newUser.setRoles(List.of(entityManager.find(Role.class,1)
));
userRepository.save(newUser);
    }

    public void deleteUser(User user){
        userRepository.delete(user);
    }

public UserDetails getCurrentlyLoggedUser(Authentication authentication){
   Object principal = authentication.getPrincipal();
   if(principal instanceof UserDetails){
       String username=((User) principal).getUsername();
       UserDetails loggedUser = loadUserByUsername(username);
       return loggedUser;
   }

   return null;


}}

@Controller
@RequiredArgsConstructor
public class OrderController {

    private final OrderService orderService;
@Autowired
    private final UserDetailsService userDetailsService;


    @GetMapping("/orderlist")
    public String showOrdeList(Model model, @AuthenticationPrincipal Authentication authentication){
userDetailsService.getCurrentlyLoggedUser

    }
}

我想知道为什么来自UserDetailsServiceImpl类的方法不会出现在控制器中...我只能访问接口中的方法，但不能访问其他实现的方法。我尝试使用限定符，甚至制作了一个config类来在按接口注入bean时实例化impl类。

@Configuration
public class OrderConfig {

    @Bean("userDetailsService")
    public UserDetailsService userDetailsService() {
        return new UserDetailsServiceImpl();
    }

谁能告诉我我做错了什么？

Answer 1

在UserDetailsServiceImpl中定义但未在UserDetailsService中定义的方法不可访问，因为您正在通过接口UserDetailsService注入服务，而编译器不知道将在运行时注入哪个实现。

因此，您需要用所有要按类公开或注入服务的方法定义自己的接口。

@Autowired
private final UserDetailsServiceImpl userDetailsService;

我建议使用自定义接口扩展userdetailsservice并使用自定义接口注入服务。