设计模式模式（四）：建造者模式（生成器模式）

建造者模式主要解决问题：

　　具备若干成员，当其中一个成员发生变化，其它成员也随着发生变化。

　　这种复杂对象的生成需要使用建造者模式来生成。

建造者设计模式的结构图：

　　来源：

 

 

 例子：

　　街头篮球角色创建模拟

街头篮球： 中锋、前锋、后卫

最重要的属性：身高（会影响其他属性）

中锋：身高加1 速度减1 盖帽加2

前锋：身高加2 速度减1 盖帽加1

后卫：身高加3 速度减1 盖帽加1

 

代码如下：

　　代码结构图;

　　　　　　

　　具体代码;

 

父类;abstractplayer：　

 1 package org.yys.建造者设计模式.interfaces.impl;
 2 
 3 public class abstractplayer {
 4         /**
 5          * 身高: height
 6          * 速度: speedvalue
 7          * 盖帽: blockvalue
 8          */
 9     
10         protected int height;
11         protected int speedvalue;
12         protected int blockvalue;
13         public int getheight() {
14             return height;
15         }
16         public void setheight(int height) {
17             this.height = height;
18         }
19         public int getspeedvalue() {
20             return speedvalue;
21         }
22         public void setspeedvalue(int speedvalue) {
23             this.speedvalue = speedvalue;
24         }
25         public int getblockvalue() {
26             return blockvalue;
27         }
28         public void setblockvalue(int blockvalue) {
29             this.blockvalue = blockvalue;
30         }
31         @override
32         public string tostring() {
33             return "player [height=" + height + ", speedvalue=" + speedvalue + ", blockvalue=" + blockvalue + "]";
34         }
35          
36                 
37 
38 }

 cplayer:前锋entity：

 

 1 package org.yys.建造者设计模式.entity;
 2 
 3 import org.yys.建造者设计模式.interfaces.impl.abstractplayer;
 4 public class cplayer  extends  abstractplayer{
 5 
 6     public cplayer() {
 7         super();
 8         this.height=190;
 9         this.speedvalue=25; 
10         this.blockvalue=75 ;
11     }
12 
13     @override
14     public string tostring() {
15         return "cplayer [tostring()=" + super.tostring() + "]";
16     }
17     
18     
19    } 

fplayer:中锋entity：

 1 package org.yys.建造者设计模式.entity;
 2 import org.yys.建造者设计模式.interfaces.impl.abstractplayer;
 3 
 4 public class fplayer   extends   abstractplayer{
 5 
 6     @override
 7     public string tostring() {
 8         return "fplayer [tostring()=" + super.tostring() + "]";
 9     }
10 
11     public fplayer() {
12         super();
13         this.height=180 ; 
14         this.blockvalue=50 ; 
15         this.speedvalue=50 ; 
16     }
17  }

gplayer：后卫entity:

 1 package org.yys.建造者设计模式.entity;
 2 
 3 import org.yys.建造者设计模式.interfaces.impl.abstractplayer;
 4 
 5 public class gplayer  extends  abstractplayer {
 6 
 7     public gplayer() {
 8         super();
 9         this.height =   170 ;  
10         this.blockvalue = 30 ; 
11         this.speedvalue =75  ;  
12     }
13 
14     @override
15     public string tostring() {
16         return "gplayer [tostring()=" + super.tostring() + "]";
17     }
18     
19     
20 
21 }

builder接口（改变数值的具体方法接口）

 1 package org.yys.建造者设计模式.interfaces;
 2 
 3 import org.yys.建造者设计模式.interfaces.impl.abstractplayer;
 4 
 5 public interface builder {
 6 
 7     void  changeheight(int  count);
 8     void  changeblockvalue(int  count);
 9     void  changespeedvalue(int  count);
10     
11     abstractplayer    getplayer();
12 }

cplayerbuilderimpl：

 1 package org.yys.建造者设计模式.interfaces.impl;
 2 
 3 import org.yys.建造者设计模式.entity.cplayer;
 4 import org.yys.建造者设计模式.interfaces.builder;
 5 
 6 public class cplayerbuilderimpl  implements  builder {
 7     
 8     private   cplayer    player =  new cplayer();
 9     @override
10     public void changeheight(int count) {
11         
12         this.player.height  +=count ;
13     }
14 
15     @override
16     public void changeblockvalue(int count) {
17         // todo auto-generated method stub
18         this.player.blockvalue +=count*2;
19     }
20 
21     @override
22     public void changespeedvalue(int count) {
23         // todo auto-generated method stub
24         this.player.speedvalue -=count ; 
25     }
26 
27     @override
28     public abstractplayer getplayer() {
29         // todo auto-generated method stub
30         return   this.player;
31     }
32 
33 }

fplayerbuilderimpl：

 1 package org.yys.建造者设计模式.interfaces.impl;
 2 
 3 import org.yys.建造者设计模式.entity.fplayer;
 4 import org.yys.建造者设计模式.interfaces.builder;
 5 
 6 public class fplayerbuilderimpl  implements  builder {
 7     private   fplayer   player =  new  fplayer();
 8     @override
 9     public void changeheight(int count) {
10         // todo auto-generated method stub
11         this.player.height += count ; 
12     }
13 
14     @override
15     public void changeblockvalue(int count) {
16         // todo auto-generated method stub
17             this.player.blockvalue +=count/2 ; 
18     }
19 
20     @override
21     public void changespeedvalue(int count) {
22         // todo auto-generated method stub
23         this.player.speedvalue  -=count/2 ;
24     }
25 
26     @override
27     public abstractplayer getplayer() {
28         // todo auto-generated method stub
29         return this.player;
30     }
31 
32 }

gplayerbuilderimpl：

 1 package org.yys.建造者设计模式.interfaces.impl;
 2 
 3 import org.yys.建造者设计模式.entity.gplayer;
 4 import org.yys.建造者设计模式.interfaces.builder;
 5 
 6 public class gplayerbuilderimpl implements builder {
 7     private gplayer player = new gplayer();
 8 
 9     @override
10     public void changeheight(int count) {
11         // todo auto-generated method stub
12         this.player.height += count;
13     }
14 
15     @override
16     public void changeblockvalue(int count) {
17         // todo auto-generated method stub
18         this.player.blockvalue += count / 3;
19     }
20 
21     @override
22     public void changespeedvalue(int count) {
23         // todo auto-generated method stub
24         this.player.speedvalue -= count / 3;
25     }
26 
27     @override
28     public abstractplayer getplayer() {
29         // todo auto-generated method stub
30         return this.player;
31     }
32 
33 }

redirector（总指挥）

 1 package org.yys.建造者设计模式.interfaces;
 2 
 3 import org.yys.建造者设计模式.interfaces.impl.abstractplayer;
 4 
 5 public class redirector {
 6 
 7     private builder builder;
 8 
 9     public redirector(builder builder) {
10         super();
11         this.builder = builder;
12     }
13 
14     public abstractplayer changecount(int count) {
15 
16         builder.changeheight(count);
17         builder.changespeedvalue(count);
18         builder.changeblockvalue(count);
19 
20         return builder.getplayer();
21 
22     }
23 
24 }

测试：

 1 package org.yys.建造者设计模式.demo;
 2 
 3 import org.yys.建造者设计模式.interfaces.redirector;
 4 import org.yys.建造者设计模式.interfaces.impl.abstractplayer;
 5 import org.yys.建造者设计模式.interfaces.impl.cplayerbuilderimpl;
 6 
 7 public class testdemo {
 8     public static void main(string[] args) {
 9         
10         redirector  redirector   =  new  redirector(new cplayerbuilderimpl());
11         
12         abstractplayer  player =redirector.changecount(10);
13         
14         system.out.println(player);
15     
16         
17     }
18 }

结果：

 

 

 

 

学识浅薄，如有不对，恳请指教。