Adapter Pattern

p1

1.类适配器模式

//目标接口，要求适配后的接口

public interface Target{

public void requiredMethod1();

public void requiredMethod2();

}

//被适配的源

public class Adaptee{

public void sourceMethod1(){...};

public void sourceMethod2(){...};

public void sourceMethod3(){...};

}

//其中一个适配器实现

public class Adapter extends Adaptee implements Target{

public void requiredMethod1(){//适配后的实现}

public void requiredMethod2(){//适配后的实现}

}

局限性：适配器Adapter只能适配到一个源，不能适配其子类。

 

2.对象适配器模式

//目标接口，要求适配后的接口

public interface Target{

public void requiredMethod1();

public void requiredMethod2();

}

//被适配的源

public class Adaptee{

public void sourceMethod1(){...};

public void sourceMethod2(){...};

public void sourceMethod3(){...};

}

//其中一个适配器实现

public class Adapter implements Target{

private Adaptee adaptee ;

public Adapter(Adaptee adaptee){this.adaptee=adaptee};

public void requiredMethod1(){//适配后的实现}

public void requiredMethod2(){//适配后的实现}

}

优越性：解决类适配器的局限性问题。