可以在春季扩展pojo类吗? [英] Is it possible to extend a pojo class in Spring?

问题描述

我有一个pojo，其中包含一组私有变量及其设置器和获取器.这个pojo在我的应用程序中被广泛使用.现在，我必须支持一个场景，其中存在多个pojo，每个pojo是我拥有的初始pojo的超集.我是否可以扩展我的原始pojo，以便不需要更改现有的业务逻辑. 我是春天的新手，我不知道这是否有可能. Pojo B应该包含pojo A中的所有内容以及更多其他内容. 在代码内部，我将通过pojo A创建pojo B对象. 基本上，有些事情类似于继承，但带有pojos.

I have a pojo which contains a set of private variables and their setters and getters. This pojo is used extensively across my application. Now, I have to support a scenario where there are multiple pojos and each pojo is a superset of the initial pojo I have. Is it possible that I can extend my original pojo so that I need not change my existing business logic. I am new to spring and I dont know if this is possible. Pojo B should contain everything in pojo A and few more things. Inside the code I will create pojo B objects through pojo A. Basically, some thing similar to inheritance, but with pojos.

推荐答案

通常，您将聚合或继承.

Typically, you would either aggregate or inherit.

继承:

class A {
    private String name;
    public String getName() {
        return name;
    }
}

class B extends A {
}

汇总

public interface A {
    public String getName();
}

public class AImpl implements A {
    private String name;
    public String getName() {
        return name;
    }
}

public class BImpl implements A {
    private A wrapped;
    public BImpl(A wrapped) {
        this.wrapped = wrapped;
    }
    public String getName() {
        return wrapped.getName();
    }
}

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