设计模式系列之适配器模式:适配器模式属于结构型设计模式,主要应用于升级或改造旧系统时。所谓适配器按生活中的说法就是一个转接口,将原本不直接匹配的两个产品组合起来,类似于用iPhone手机充电器给android手机充电需要一个转换头,生活中这种例子随处可见。
适配器模式主要有三个组成部分,目标接口,适配器,适配对象。
package com.panda.adpter; public interface Target { void targ(); }
package com.panda.adpter; public class Adaptee { public void ada(){ System.out.println("适配对象方法!"); } }
package com.panda.adpter; public class Adapter extends Adaptee implements Target { @Override public void targ() { // TODO Auto-generated method stub super.ada(); } }
package com.panda.adpter; public class Client { public void test(Target t){ t.targ(); } public static void main(String[] args) { Client c = new Client(); // Adapter a = new Adapter(); Target t = new Adapter(); c.test(t); } }
package com.panda.adpter; public class Adapter implements Target { private Adaptee adaptee; public Adapter(Adaptee adaptee) { super(); this.adaptee = adaptee; } @Override public void targ() { // TODO Auto-generated method stub adaptee.ada(); } }
package com.panda.adpter; public class Client { public void test(Target t){ t.targ(); } public static void main(String[] args) { Client c = new Client(); Adaptee a = new Adaptee(); Target t = new Adapter(a); c.test(t); } }