JAVA-抽象工厂模式

抽象工厂模式是设计模式工厂设计模式较为复杂的一种设计模式，英文概念翻译是:为创建一组相关或相互依赖的对象提供一个借口，无需指定它们的具体类”。抽象工厂模式通常是用于创一族产品，并且这族产品分不同的等级；不同的具体工厂类生产不同等级的一族产品。抽象工厂模式也有四种角色：抽象工厂、具体工厂、抽象产品和具体产品.典型的面向接口/抽象类的编程模式。

抽象工厂模式的类图:

代码示例：

工程示例:

1.创建抽象工厂接口：

package test.edu.absfactory;public interface IAbstractFactory {public IRestaurant  restaurantFactory();public ISpecialDishes  specialDisheFactory();public IWine  wineFactory();}

2.创建产品族接口：

package test.edu.absfactory;public interface IRestaurant {public void restaurantName();}

package test.edu.absfactory;public interface ISpecialDishes {public void eatSpecialDishes ();}

package test.edu.absfactory;public interface IWine {public void drinkWine ();}

3.创建具体产品类:

中国特色餐馆产品族实现类：

package test.edu.impl;import test.edu.absfactory.IRestaurant;public class ChineseRestaurant implements IRestaurant {@Overridepublic void restaurantName() {System.out.println("这是中国餐馆");}}

package test.edu.impl;import test.edu.absfactory.ISpecialDishes;public class ChineseDishes implements ISpecialDishes {@Overridepublic void eatSpecialDishes() {System.out.println("吃特色菜满汉全席");}}

package test.edu.impl;import test.edu.absfactory.IWine;public class ChineseWLY implements IWine {@Overridepublic void drinkWine() {System.out.println("喝五粮液");}}

韩国特色餐馆产品族实现类：

package test.edu.impl;import test.edu.absfactory.IRestaurant;public class KORRestaurant implements IRestaurant {@Overridepublic void restaurantName() {System.out.println("这是韩国菜馆");}}

package test.edu.impl;import test.edu.absfactory.ISpecialDishes;public class KORDishes implements ISpecialDishes {@Overridepublic void eatSpecialDishes() {System.out.println("吃韩国烤肉");}}

package test.edu.impl;import test.edu.absfactory.IWine;public class KORWine implements IWine {@Overridepublic void drinkWine() {System.out.println("喝韩国真露");}}

4,具体的抽象工厂类:实现抽象工厂的同时，各个产品的具体工厂也做具体实现

中国餐馆的工厂类

package test.edu.impl;import test.edu.absfactory.IAbstractFactory;import test.edu.absfactory.IRestaurant;import test.edu.absfactory.ISpecialDishes;import test.edu.absfactory.IWine;public class ChineseDeliciousFoodFactory implements IAbstractFactory {public IRestaurant  restaurantFactory(){return new ChineseRestaurant();}public ISpecialDishes  specialDisheFactory(){return new ChineseDishes();}public IWine  wineFactory(){return new ChineseWLY();}}

韩国餐馆的工厂类

package test.edu.impl;import test.edu.absfactory.IAbstractFactory;import test.edu.absfactory.IRestaurant;import test.edu.absfactory.ISpecialDishes;import test.edu.absfactory.IWine;public class KORDeliciousFoodFactory implements IAbstractFactory {public IRestaurant  restaurantFactory(){return new KORRestaurant();}public ISpecialDishes  specialDisheFactory(){return new KORDishes();}public IWine  wineFactory(){return new KORWine();}}

测试客户端:

去中国菜馆

package test.edu.client;import test.edu.absfactory.IAbstractFactory;import test.edu.impl.ChineseDeliciousFoodFactory;public class AbsFactoryClient {/** * @param args */public static void main(String[] args) {IAbstractFactory dff = new ChineseDeliciousFoodFactory();dff.restaurantFactory().restaurantName();dff.specialDisheFactory().eatSpecialDishes();dff.wineFactory().drinkWine();}}

结果：

这是中国餐馆吃特色菜满汉全席喝五粮液

去韩国菜馆 ：只需要 修改 

IAbstractFactory dff = new ChineseDeliciousFoodFactory();

为：

IAbstractFactory dff = new KORDeliciousFoodFactory();

package test.edu.client;import test.edu.absfactory.IAbstractFactory;import test.edu.impl.ChineseDeliciousFoodFactory;import test.edu.impl.KORDeliciousFoodFactory;public class AbsFactoryClient {/** * @param args */public static void main(String[] args) {IAbstractFactory dff = new KORDeliciousFoodFactory();dff.restaurantFactory().restaurantName();dff.specialDisheFactory().eatSpecialDishes();dff.wineFactory().drinkWine();}}

结果:

这是韩国菜馆吃韩国烤肉喝韩国真露

当然在实际应用如何切换不同的工厂类，可以在配置文件配置，也可以利用不同的条件调用不同的抽象工厂实现类。