Spring无法自动连线对象？是否可以在抽象类中自动装配对象。假设所有模式都在application-context.xml中提供

问题：@Service @Component应该在基类和扩展类（如果有）上使用什么批注？

例

abstract class SuperMan {

    @Autowire
    private DatabaseService databaseService;

    abstract void Fly();

    protected void doSuperPowerAction(Thing thing) {

        //busy code

        databaseService.save(thing);

    }
}

Extending class

public class SuperGirl extends SuperMan {

    @Override
    public void Fly() {
        //busy code
    }

    public doSomethingSuperGirlDoes() {

        //busy code

        doSuperPowerAction(thing)

    }

application-context.xml

<context:component-scan base-package="com.baseLocation" />
<context:annotation-config/>