Question

是否可以为子类中的实例自动关联基类中定义的字段？

所以，界面：

public interface Xyz { ...}

抽象基类：

public abstract class Abc {
    Xyz xyz;
}

我要自动装配接口的具体实现的抽象类的子类：

public class Def extend Abc {
    @Autowired
    // Here I want to autowire a concrete implementation of Xyz, maybe called XyzImpl. Can I do this maybe in a constructor or ...?
}

public class Ghi extend Abc {
    @Autowired
    // Here I want to autowire a concrete implementation of Xyz, maybe called XyzImpl. Can I do this maybe in a constructor or ...?
}

public class Jkl extend Abc {
    @Autowired
    // Here I want to autowire a concrete implementation of Xyz, maybe called XyzImpl. Can I do this maybe in a constructor or ...?
}

Answer 1

尝试一下：

在Abc类中，进行此更改private final Xyz xyz;
在Abc类中，添加一个带有Xyz参数的构造函数；在此构造函数中设置xyz字段。
在Def类中，添加一个带有Xyz参数并调用super(xyz)的构造函数。
自动装配xyz构造函数中的Def参数。

如何在子类中将@Autowired用于基类中定义的字段？

1 个答案: