建造者模式主要解決問題：
具備若干成員，當其中一個成員發生變化，其它成員也隨著發生變化，
這種復雜物件的生成需要使用建造者模式來生成，
建造者設計模式的結構圖：
來源：http://c.biancheng.net/view/1354.html
例子：
街頭籃球角色創建模擬
街頭籃球： 中鋒、前鋒、后衛
最重要的屬性：身高（會影響其他屬性）
中鋒：身高加1 速度減1 蓋帽加2
前鋒：身高加2 速度減1 蓋帽加1
后衛：身高加3 速度減1 蓋帽加1
代碼如下：
代碼結構圖;
具體代碼;
父類;AbstractPlayer：
1 package org.yys.建造者設計模式.interfaces.impl; 2 3 public class AbstractPlayer { 4 /** 5 * 身高: height 6 * 速度: speedvalue 7 * 蓋帽: 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 =https://www.cnblogs.com/jiangliushibuzhuan/p/ speedvalue;24 }25 public int getBlockvalue() {26 return blockvalue;27 }28 public void setBlockvalue(int blockvalue) {29 this.blockvalue =https://www.cnblogs.com/jiangliushibuzhuan/p/ blockvalue;30 }31 @Override32 public String toString() {33 return "Player [height=" + height + ", speedvalue="https://www.cnblogs.com/jiangliushibuzhuan/p/+ speedvalue +", blockvalue="https://www.cnblogs.com/jiangliushibuzhuan/p/+ blockvalue +"]";34 }35 36 37 38 }
CPlayer:前鋒entity：
1 package org.yys.建造者設計模式.entity; 2 3 import org.yys.建造者設計模式.interfaces.impl.AbstractPlayer; 4 public class CPlayer extends AbstractPlayer{ 5 6 public CPlayer() { 7 super(); 8 this.height=190; 9 this.speedvalue=https://www.cnblogs.com/jiangliushibuzhuan/p/25; 10 this.blockvalue=https://www.cnblogs.com/jiangliushibuzhuan/p/75 ;11 }12 13 @Override14 public String toString() {15 return "CPlayer [toString()=" + super.toString() + "]";16 }17 18 19 }
FPlayer:中鋒entity：
1 package org.yys.建造者設計模式.entity; 2 import org.yys.建造者設計模式.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=https://www.cnblogs.com/jiangliushibuzhuan/p/50 ; 15 this.speedvalue=https://www.cnblogs.com/jiangliushibuzhuan/p/50 ; 16 }17 }
GPlayer：后衛entity:
1 package org.yys.建造者設計模式.entity; 2 3 import org.yys.建造者設計模式.interfaces.impl.AbstractPlayer; 4 5 public class GPlayer extends AbstractPlayer { 6 7 public GPlayer() { 8 super(); 9 this.height = 170 ; 10 this.blockvalue = https://www.cnblogs.com/jiangliushibuzhuan/p/30 ; 11 this.speedvalue =https://www.cnblogs.com/jiangliushibuzhuan/p/75 ; 12 }13 14 @Override15 public String toString() {16 return "GPlayer [toString()=" + super.toString() + "]";17 }18 19 20 21 }
Builder介面（改變數值的具體方法介面）
1 package org.yys.建造者設計模式.interfaces; 2 3 import org.yys.建造者設計模式.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.建造者設計模式.interfaces.impl; 2 3 import org.yys.建造者設計模式.entity.CPlayer; 4 import org.yys.建造者設計模式.interfaces.Builder; 5 6 public class CPlayerBuilderImpl implements Builder { 7 8 private CPlayer player = new CPlayer(); 9 @Override10 public void changeHeight(int count) {11 12 this.player.height +=count ;13 }14 15 @Override16 public void changeBlockValue(int count) {17 // TODO Auto-generated method stub18 this.player.blockvalue +=count*2;19 }20 21 @Override22 public void changeSpeedValue(int count) {23 // TODO Auto-generated method stub24 this.player.speedvalue -=count ; 25 }26 27 @Override28 public AbstractPlayer getPlayer() {29 // TODO Auto-generated method stub30 return this.player;31 }32 33 }
FPlayerBuilderImpl：
1 package org.yys.建造者設計模式.interfaces.impl; 2 3 import org.yys.建造者設計模式.entity.FPlayer; 4 import org.yys.建造者設計模式.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 stub11 this.player.height += count ; 12 }13 14 @Override15 public void changeBlockValue(int count) {16 // TODO Auto-generated method stub17 this.player.blockvalue +=count/2 ; 18 }19 20 @Override21 public void changeSpeedValue(int count) {22 // TODO Auto-generated method stub23 this.player.speedvalue -=count/2 ;24 }25 26 @Override27 public AbstractPlayer getPlayer() {28 // TODO Auto-generated method stub29 return this.player;30 }31 32 }
GPlayerBuilderImpl：
1 package org.yys.建造者設計模式.interfaces.impl; 2 3 import org.yys.建造者設計模式.entity.GPlayer; 4 import org.yys.建造者設計模式.interfaces.Builder; 5 6 public class GPlayerBuilderImpl implements Builder { 7 private GPlayer player = new GPlayer(); 8 9 @Override10 public void changeHeight(int count) {11 // TODO Auto-generated method stub12 this.player.height += count;13 }14 15 @Override16 public void changeBlockValue(int count) {17 // TODO Auto-generated method stub18 this.player.blockvalue += count / 3;19 }20 21 @Override22 public void changeSpeedValue(int count) {23 // TODO Auto-generated method stub24 this.player.speedvalue -= count / 3;25 }26 27 @Override28 public AbstractPlayer getPlayer() {29 // TODO Auto-generated method stub30 return this.player;31 }32 33 }
Redirector（總指揮）
1 package org.yys.建造者設計模式.interfaces; 2 3 import org.yys.建造者設計模式.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 }
測驗：
1 package org.yys.建造者設計模式.Demo; 2 3 import org.yys.建造者設計模式.interfaces.Redirector; 4 import org.yys.建造者設計模式.interfaces.impl.AbstractPlayer; 5 import org.yys.建造者設計模式.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 }
結果：
學識淺薄，如有不對，懇請指教，
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標籤：設計模式
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