常见设计模式之【适配器模式】

常用的问题：比如手机、Mp3、电脑等的充电器，转换接头都相当于一个适配器。类似这种数据转换的马上想到适配器模式

package MyAdapter;/** *@Description: 适配器模式 *@author Potter    *@date 2012-8-14 下午11:17:12 *@version V1.0    */public class App {public static void main(String[] args) {Adapter adapter=new Adapter();adapter.setPower(new Power(220));Device phone=new Phone();phone.ac(adapter);}}

电源类：

package MyAdapter;/** *@Description: 电源 *@author Potter    *@date 2012-8-14 下午11:20:35 *@version V1.0    */public class Power {int v;//电压public Power(int v){this.v=v;}}

适配器类：

package MyAdapter;/** *@Description:  *@author Potter    *@date 2012-8-14 下午11:18:10 *@version V1.0    */public class Adapter {Power power;/**转变成合适的电源给设备充电**/public int convert(Device device){if(device instanceof Mp3){power.v=20;}else if(device instanceof Phone){power.v=25;}return power.v;}public Power getPower() {return power;}public void setPower(Power power) {this.power = power;}}

 

设备抽象类：

package MyAdapter;/** *@Description:  *@author Potter    *@date 2012-8-15 下午09:59:58 *@version V1.0    */public abstract class Device {/**充电 * @param p 电压 */public abstract void ac(Adapter adapter);}

具体类MP3:

package MyAdapter;/** *@Description:  *@author Potter    *@date 2012-8-14 下午11:18:39 *@version V1.0    */public class Mp3 extends Device{@Overridepublic void ac(Adapter adapter) {System.out.println("map3 充电,电压为"+adapter.convert(this)+"V");}}

具体类Phone:

package MyAdapter;/** *@Description:  *@author Potter    *@date 2012-8-14 下午11:18:29 *@version V1.0    */public class Phone extends Device{@Overridepublic void ac(Adapter adapter) {System.out.println("手机充电,电压为"+adapter.convert(this)+"V");}}

打印结果：

手机充电,电压为25V

 

这是我对适配器模式的理解，大家如果觉得小弟哪里讲得不对的地方，还请指针。谢谢