适配器模式Adapter

前言

Convert the interface of a class into another interface clients expect.Adapter lets classes work together that couldn’t otherwise
because of incompatible interfaces.

将一个类的接口变成客户端所期待的另一个接口，从而使原本因接口不匹配而无法一起工作的两个类能够一起工作。

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示例说明

通过球员的进攻防守说明，美国的前锋、中锋、后卫的进攻attack()、防守guard()用英文输出
中国球员的进攻防守进攻用进攻()、防守用防守()用英文输出 (起中文函数名实属无奈，只是为了更好的区分，有强迫症的请忽略…)

然后在客户端测试时，不论中国球员还是美国球员都是进攻调用attack()方法、防守调用guard()方法

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源码下载

GitHub:https://github.com/YEN-GitHub/PatternDemo/tree/master/src/StructuralPattern/AdapterPattern

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类适配器模式

UML

示例代码

package StructuralPattern.AdapterPattern.demo2;/** * Created by yangenneng on 2017-05-10 21:51 * Abstract： */public interface AmericanPlayer {    //进攻    public void attack();    //防守    public void guard();}

package StructuralPattern.AdapterPattern.demo2;import StructuralPattern.AdapterPattern.demo2.AmericanPlayer;/** * Created by yangenneng on 2017-05-10 21:32 * Abstract：前锋 */public class Forward implements AmericanPlayer {    private String name;    public Forward(String name){this.name=name;}    //进攻    public void attack(){        System.out.println("American Player Forward："+name+" attack");    }    //防守    public void guard(){        System.out.println("American Player Forward："+name+" guard");    }}

package StructuralPattern.AdapterPattern.demo2;/** * Created by yangenneng on 2017-05-10 21:35 * Abstract：中锋 */public class Centre implements AmericanPlayer {    private String name;    public Centre(String name){this.name=name;}    //进攻    public void attack(){        System.out.println("American Player Centre："+name+" attack");    }    //防守    public void guard(){        System.out.println("American Player Centre："+name+" guard");    }}

package StructuralPattern.AdapterPattern.demo2;import StructuralPattern.AdapterPattern.demo2.AmericanPlayer;/** * Created by yangenneng on 2017-05-10 21:37 * Abstract：后卫 */public class Guard implements AmericanPlayer {    private String name;    public Guard(String name){this.name=name;}    //进攻    public void attack(){        System.out.println("American Player Guard："+name+" attack");    }    //防守    public void guard(){        System.out.println("American Player Guard："+name+" guard");    }}

package StructuralPattern.AdapterPattern.demo2;/** * Created by yangenneng on 2017-05-10 21:37 * Abstract：中国球员 */public class ChinaPlayer {    protected String name;    public ChinaPlayer(String name){this.name=name;}    //进攻    public void 进攻(){        System.out.println("中国球员:"+name+"进攻");    }    //防守    public void 防守(){        System.out.println("中国球员:"+name+"防守");    }}

package StructuralPattern.AdapterPattern.demo2;/** * Created by yangenneng on 2017-05-10 21:56 * Abstract： */public class Adapter extends ChinaPlayer implements AmericanPlayer{    public Adapter(String name) {        super(name);    }    @Override    public void attack() {        super.进攻();    }    @Override    public void guard() {        super.防守();    }}

package StructuralPattern.AdapterPattern.demo2;/** * Created by yangenneng on 2017-05-10 21:59 * Abstract：客户端测试 */public class Client {    public static void main(String[] args) {        System.out.println("类适配器模式");        AmericanPlayer americanPlayer1=new Forward("aaa");        AmericanPlayer americanPlayer2=new Centre("bbb");        AmericanPlayer americanPlayer3=new Guard("ccc");        Adapter chinaPlayer1=new Adapter("姚明");        //进攻  都是调用attack方法        americanPlayer1.attack();        americanPlayer2.attack();        americanPlayer3.attack();        chinaPlayer1.attack();        System.out.println();        //防守  都是调用guard方法        americanPlayer1.guard();        americanPlayer2.guard();        americanPlayer3.guard();        chinaPlayer1.guard();    }}

测试结果

对象适配器模式

UML

示例代码

package StructuralPattern.AdapterPattern.demo1;/** * Created by yangenneng on 2017-05-10 21:30 * Abstract：美国球员 */public class AmericanPlayer {    protected String name;    public AmericanPlayer(String name){this.name=name;}    //进攻    public void attack(){    }    //防守    public void guard(){    }}

package StructuralPattern.AdapterPattern.demo1;/** * Created by yangenneng on 2017-05-10 21:32 * Abstract：前锋 */public class Forward  extends AmericanPlayer{    public Forward(String name) {        super(name);    }    //进攻    public void attack(){        System.out.println("American Player Forward："+name+" attack");    }    //防守    public void guard(){        System.out.println("American Player Forward："+name+" guard");    }}

package StructuralPattern.AdapterPattern.demo1;/** * Created by yangenneng on 2017-05-10 21:35 * Abstract：中锋 */public class Centre extends AmericanPlayer {    public Centre(String name) {        super(name);    }    //进攻    public void attack(){        System.out.println("American Player Centre："+name+" attack");    }    //防守    public void guard(){        System.out.println("American Player Centre："+name+" guard");    }}

package StructuralPattern.AdapterPattern.demo1;/** * Created by yangenneng on 2017-05-10 21:37 * Abstract：后卫 */public class Guard extends AmericanPlayer {    public Guard(String name) {        super(name);    }    //进攻    public void attack(){        System.out.println("American Player Guard："+name+" attack");    }    //防守    public void guard(){        System.out.println("American Player Guard："+name+" guard");    }}

package StructuralPattern.AdapterPattern.demo1;/** * Created by yangenneng on 2017-05-10 21:37 * Abstract：中国球员 */public class ChinaPlayer {    protected String name;    public ChinaPlayer(String name){this.name=name;}    //进攻    public void 进攻(){        System.out.println("中国球员:"+name+"进攻");    }    //防守    public void 防守(){        System.out.println("中国球员:"+name+"防守");    }}

package StructuralPattern.AdapterPattern.demo1;import StructuralPattern.AdapterPattern.demo1.*;/** * Created by yangenneng on 2017-05-10 21:42 * Abstract： */public class Adapter extends AmericanPlayer {    private ChinaPlayer chinaPlayer=null;    public Adapter(String name){        super(name);        chinaPlayer=new ChinaPlayer(name);    }    //进攻    public void attack(){        chinaPlayer.进攻();    }    //防守    public void guard(){        chinaPlayer.防守();    }}

package StructuralPattern.AdapterPattern.demo1;/** * Created by yangenneng on 2017-05-10 21:44 * Abstract：客户端测试代码 */public class Client {    public static void main(String[] args) {        System.out.println("对象适配器模式");        AmericanPlayer americanPlayer1=new Forward("aaa");        AmericanPlayer americanPlayer2=new Centre("bbb");        AmericanPlayer americanPlayer3=new Guard("ccc");        Adapter chinaPlayer1=new Adapter("姚明");        //进攻  都是调用attack方法        americanPlayer1.attack();        americanPlayer2.attack();        americanPlayer3.attack();        chinaPlayer1.attack();        System.out.println();        //防守  都是调用guard方法        americanPlayer1.guard();        americanPlayer2.guard();        americanPlayer3.guard();        chinaPlayer1.guard();    }}

测试结果