适配器模式的实现原理



//目标接口 interface TwoWayTarget { public void request(); } //适配者接口 interface TwoWayAdaptee { public void specificRequest(); } //目标实现 class TargetRealize implements TwoWayTarget { public void request() { System.out.println("目标代码被调用！"); } } //适配者实现 class AdapteeRealize implements TwoWayAdaptee { public void specificRequest() { System.out.println("适配者代码被调用！"); } } //双向适配器 class TwoWayAdapter implements TwoWayTarget, TwoWayAdaptee { private TwoWayTarget target; private TwoWayAdaptee adaptee; public TwoWayAdapter(TwoWayTarget target) { this.target=target; } public TwoWayAdapter(TwoWayAdaptee adaptee) { this.adaptee=adaptee; } public void request() { adaptee.specificRequest(); } public void specificRequest() { target.request(); } } //客户端代码 public class TwoWayAdapterTest { public static void main(String[] args) { System.out.println("目标通过双向适配器访问适配者："); TwoWayAdaptee adaptee=new AdapteeRealize(); TwoWayTarget target=new TwoWayAdapter(adaptee); target.request(); System.out.println("-------------------"); System.out.println("适配者通过双向适配器访问目标："); target=new TargetRealize(); adaptee=new TwoWayAdapter(target); adaptee.specificRequest(); } }

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