- 一、什麼是抽象工廠模式
抽象工廠模式是所有形態的工廠模式中最爲抽象和最其一般性的。抽象工廠模式可以向客戶端提供一個接口,使得客戶端在不必指定產品的具體類型的情況下,能夠創建多個產品族的產品對象。
- 二、產品族和產品等級結構
- 三、模式中包含的角色及其職責1.抽象工廠(Creator)角色 抽象工廠模式的核心,包含對多個產品結構的聲明,任何工廠類都必須實現這個接口。2.具體工廠( Concrete Creator)角色 具體工廠類是抽象工廠的一個實現,負責實例化某個產品族中的產品對象。3.抽象(Product)角色 抽象模式所創建的所有對象的父類,它負責描述所有實例所共有的公共接口。4.具體產品(Concrete Product)角色 抽象模式所創建的具體實例對象總結:抽象工廠中方法對應產品結構,具體工廠對應產品族。
- 代碼實現:抽象Fruit(水果)類:[java]package com.qianyan.product;public interface Fruit {/*** 採集*/public void get();}抽象產品結構類(蘋果、香蕉):[java]package com.qianyan.bean;import com.qianyan.product.Fruit;public abstract class Apple implements Fruit{/*** 採集*/public abstract void get();}[java]package com.qianyan.bean;import com.qianyan.product.Fruit;public abstract class Banana implements Fruit{/*** 採集*/public abstract void get();}抽象產品類的實現:產品族(北方蘋果、香蕉;南方蘋果、香蕉):[java]package com.qianyan.bean.impl;import com.qianyan.bean.Apple;public class NorthApple extends Apple{@Overridepublic void get() {System.out.println("生產北方蘋果!");}}[java]package com.qianyan.bean.impl;import com.qianyan.bean.Banana;public class NorthBanana extends Banana{@Overridepublic void get() {System.out.println("生產北方香蕉!");}}[java]package com.qianyan.bean.impl;import com.qianyan.bean.Apple;public class SourthApple extends Apple{@Overridepublic void get() {System.out.println("生產南方蘋果!");}}[java]package com.qianyan.bean.impl;import com.qianyan.bean.Banana;public class SourthBanana extends Banana{@Overridepublic void get() {System.out.println("生產南方香蕉!");}}抽象工廠類(對應產品結構類):[java]package com.qianyan.factory;import com.qianyan.product.Fruit;/*** 抽象工廠類* @author hadoop**/public interface FruitFactory {//獲取蘋果public Fruit getApple();//獲取香蕉public Fruit getBanana();}抽象工廠的實現類(對應產品族):[java]package com.qianyan.factory.impl;import com.qianyan.bean.impl.NorthApple;import com.qianyan.bean.impl.NorthBanana;import com.qianyan.factory.FruitFactory;import com.qianyan.product.Fruit;public class NorthFactory implements FruitFactory{@Overridepublic Fruit getApple() {return new NorthApple();}@Overridepublic Fruit getBanana() {return new NorthBanana();}}[java]package com.qianyan.factory.impl;import com.qianyan.bean.impl.SourthApple;import com.qianyan.bean.impl.SourthBanana;import com.qianyan.factory.FruitFactory;import com.qianyan.product.Fruit;public class SourthFactory implements FruitFactory{@Overridepublic Fruit getApple() {return new SourthApple();}@Overridepublic Fruit getBanana() {return new SourthBanana();}}顧客類:[java]package com.qianyan.user;import com.qianyan.factory.impl.NorthFactory;import com.qianyan.factory.impl.SourthFactory;import com.qianyan.product.Fruit;public class Customer {public static void main(String[] args) throws Exception {//獲得北方生產鏈NorthFactory f1 = new NorthFactory();//通過NorthFactory來獲取北方Apple實例對象Fruit northApple = f1.getApple();northApple.get();//通過NorthFactory來獲取北方Banana實例對象Fruit northBanana = f1.getBanana();northBanana.get();//獲得南方生產鏈SourthFactory f2 = new SourthFactory();//通過SourthFactory來獲取南方Apple實例對象Fruit sourthApple = f2.getApple();sourthApple.get();//通過SourthFactory來獲取南方Banana實力對象Fruit sourthBanana = f2.getBanana();sourthBanana.get();}}