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：
我要评论 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。
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