java - spring 模板方法模式 注入属性的问题

Question

asbtract class A {
    private String attr = "";
}

class B extends A {
    @Value("${xxx}")
    private String attr;
}

假如properties里面的xxx的值为“123”，配置了一个bean名叫a， a.attr的值是多少？“” 还是 “123”？

Answer 1

My new is of course ""
The one managed by spring is "123"

Answer 2

I think it should be "", because member variables are statically bound, which means they are determined at compile time. The type of a at compile time is class A.