Adapter Pattern 适配器模式

最新推荐文章于 2025-02-18 16:58:55 发布

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本文介绍了适配器模式的基本概念及其实现方式。通过使用对象组合的方法，将一个类的接口转换为另一个接口，使原本因接口不兼容而无法协同工作的类能够一起工作。文章详细展示了适配器模式的组成部分及其应用场景。

Adapter Pattern: converts the interface of a class into another interface the clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces.

Use of object composition to wrap the adaptee with an altered interface.

适配器模式把一个类的接口变换成客户端所期待的另一种接口，从而使原本接口不匹配而无法在一起工作的两个类能够在一起工作。

1. The client makes a request to the adapter by calling a method on it using the target interface.

2. The adapter translates the request into one or more calls on the adaptee using the adaptee interface.

3. The client receives the results of the call and never knows there is an adapter doing the translation.

定义目标接口：

public interface Target {
	public void request();
}

定义源类：

public class Adaptee {
	public void specificRequest() {
		// Do request;
	}
}

定义Adapter：

public class Adapter implements Target {
	Adaptee adaptee;
	public Adapter(Adaptee adaptee) {
		this.adaptee = adaptee;
	}
	@Override
	public void request() {
		adaptee.specificRequest();
	}
}

定义Client:

public class Client {
	public static void main(String[] args) {
	    Adaptee adaptee = new Adaptee();
	    Adapter adapter = new Adapter(adaptee);
	    adapter.request();
	}
}

应用：库兼容