设计模式--策略模式[Strategy]

本文地址:http://www.cnblogs.com/masque/p/3825692.html

转载请在明显位置标明出处

策略模式,良好的扩展性,将对象分割成2部分,一部分是相同属性(抽象类),一部分是独有的属性(接口),良好的扩展,自由的组合出需要的新的对象

资料来自网络,例子由自己编写

例子:  角色和武器   角色都有攻击力 ,攻击速度和移动速度    武器有自己独有的特性     但是角色又拥有武器

定义角色的抽象父类

 1 package org.masque.designpatterns.strategy;
 2 /**
 3  * 
 4  * Description:
 5  * Player.java Create on 2014年7月5日 下午1:39:16 
 6  * @author masque.java@outlook.com
 7  * @version 1.0
 8  * Copyright (c) 2014 Company,Inc. All Rights Reserved.
 9  */
10 public abstract class Player {
11 
12     protected int ATK;
13     
14     protected double ASPD;
15     
16     protected int speed;
17     
18     protected Weapon weapon;
19 
20     public int getATK() {
21         return ATK;
22     }
23 
24     public void setATK(int aTK) {
25         ATK = aTK;
26     }
27 
28     public double getASPD() {
29         return ASPD;
30     }
31 
32     public void setASPD(double aSPD) {
33         ASPD = aSPD;
34     }
35 
36     public int getSpeed() {
37         return speed;
38     }
39 
40     public void setSpeed(int speed) {
41         this.speed = speed;
42     }
43 
44     public Weapon getWeapon() {
45         return weapon;
46     }
47 
48     public void setWeapon(Weapon weapon) {
49         this.weapon = weapon;
50     }
51 
52     @Override
53     public String toString() {
54         return "Player [ATK=" + ATK + ", ASPD=" + ASPD + ", speed=" + speed
55                 + ", weapon=" + weapon + "]";
56     }
57 }

定义武器的接口:

 1 package org.masque.designpatterns.strategy;
 2 /**
 3  * 
 4  * Description:
 5  * Weapon.java Create on 2014年7月5日 下午1:39:16 
 6  * @author masque.java@outlook.com
 7  * @version 1.0
 8  * Copyright (c) 2014 Company,Inc. All Rights Reserved.
 9  */
10 public interface Weapon {
11 
12     public void display();
13 }

角色玩家:

 1 package org.masque.designpatterns.strategy;
 2 /**
 3  * 
 4  * Description:
 5  * Player01.java Create on 2014年7月5日 下午1:39:16 
 6  * @author masque.java@outlook.com
 7  * @version 1.0
 8  * Copyright (c) 2014 Company,Inc. All Rights Reserved.
 9  */
10 public class Player01 extends Player {
11 
12     public Player01(int ATK,double ASPD,int speed,Weapon weapon){
13         this.ATK = ATK;
14         this.ASPD = ASPD;
15         this.speed = speed;
16         this.weapon = weapon;
17     }
18 }

武器1:

 1 package org.masque.designpatterns.strategy;
 2 /**
 3  * 
 4  * Description:
 5  * Weapon01.java Create on 2014年7月5日 下午1:39:16 
 6  * @author masque.java@outlook.com
 7  * @version 1.0
 8  * Copyright (c) 2014 Company,Inc. All Rights Reserved.
 9  */
10 public class Weapon01 implements Weapon {
11 
12     @Override
13     public void display() {
14         System.out.println("我是武器01");
15     }
16 
17     @Override
18     public String toString() {
19         display();
20         return "Weapon01 []";
21     }
22 }

武器2:

 1 package org.masque.designpatterns.strategy;
 2 /**
 3  * 
 4  * Description:
 5  * Weapon02.java Create on 2014年7月5日 下午1:39:16 
 6  * @author masque.java@outlook.com
 7  * @version 1.0
 8  * Copyright (c) 2014 Company,Inc. All Rights Reserved.
 9  */
10 public class Weapon02 implements Weapon {
11 
12     @Override
13     public void display() {
14         System.out.println("我是武器02");
15     }
16 
17     @Override
18     public String toString() {
19         display();
20         return "Weapon02 []";
21     }
22 }

测试类:

 1 package org.masque.designpatterns.strategy;
 2 /**
 3  * 
 4  * Description:
 5  * MainTest.java Create on 2014年7月5日 下午1:39:16 
 6  * @author masque.java@outlook.com
 7  * @version 1.0
 8  * Copyright (c) 2014 Company,Inc. All Rights Reserved.
 9  */
10 public class MainTest {
11 
12     public static void main(String[] args) {
13         Player01 player01 = new Player01(50, 0.65, 350, new Weapon01());
14         System.out.println(player01);
15         
16         player01.setWeapon(new Weapon02());
17         System.out.println(player01);
18     }
19 }

player不需要知道Weapon具体的实现细节

java多态,player拥有的武器也能更换

posted on 2014-07-05 13:53  masque  阅读(240)  评论(0)  编辑  收藏  举报

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