Guice @Provides 方法不起作用

public class MyModule extends AbstractModule {
    @Override
    protected void configure() {
        // 其他绑定操作
    }

    @Provides
    @Singleton
    MyService provideMyService() {
        return new MyServiceImpl();
    }
}

Injector injector = Guice.createInjector(new MyModule());

public class MyController {
    private final MyService myService;

    @Inject
    public MyController(MyService myService) {
        this.myService = myService;
    }
}

public class MyServiceImpl implements MyService {
    private final Provider<MyDependency> myDependencyProvider;

    @Inject
    public MyServiceImpl(Provider<MyDependency> myDependencyProvider) {
        this.myDependencyProvider = myDependencyProvider;
    }
}