常見設計模式之【適配器模式】

常用的問題：比如手機、Mp3、電腦等的充電器，轉換接頭都相當於一個適配器。類似這種資料轉換的馬上想到適配器模式

package MyAdapter;/** *@Description: 適配器模式 *@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);}}

電源類：

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

適配器類：

package MyAdapter;/** *@Description:  *@author Potter    *@date 2012-8-14 下午11:18:10 *@version V1.0    */public class Adapter {Power power;/**轉變成合適的電源給裝置充電**/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;}}

 

裝置抽象類別：

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

具體類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 充電,電壓為"+adapter.convert(this)+"V");}}

具體類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("手機充電,電壓為"+adapter.convert(this)+"V");}}

列印結果：

手機充電,電壓為25V

 

這是我對適配器模式的理解，大家如果覺得小弟哪裡講得不對的地方，還請指標。謝謝