适配器模式

适配器模式：将A接口通过适配器类的组合和封装，编程B接口。

三个角色：

A接口(实现A接口的具体类)

B接口(实现B接口的具体类)

适配器类(谁是转换接口就实现谁，需要转换的接口通过组合方式被适配器使用)

 

 

 

代码示例：

package adapter;

public interface Target {
    public void request();
}




public class ConcreteTarget implements Target {

    @Override
    public void request() {
        System.out.println("二孔插头,无法匹配插座");
    }

}






public interface Adaptee {
    public void stickIn();
}





public class ConcreteAdaptee implements Adaptee {

    @Override
    public void stickIn() {
        System.out.println("三孔插头");
    }

}







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

}






public class Client {
    public static void main(String[] args) {
        Target target = new ConcreteTarget();
        target.request();
    
        
        Adapter adapter = new Adapter(new ConcreteAdaptee());
        adapter.request();
    }
}