- 一、什么是抽象工厂模式
抽象工厂模式是所有形态的工厂模式中最为抽象和最其一般性的。抽象工厂模式可以向客户端提供一个接口,使得客户端在不必指定产品的具体类型的情况下,能够创建多个产品族的产品对象。
- 二、产品族和产品等级结构
- 三、模式中包含的角色及其职责1.抽象工厂(Creator)角色 抽象工厂模式的核心,包含对多个产品结构的声明,任何工厂类都必须实现这个接口。2.具体工厂( Concrete Creator)角色 具体工厂类是抽象工厂的一个实现,负责实例化某个产品族中的产品对象。3.抽象(Product)角色 抽象模式所创建的所有对象的父类,它负责描述所有实例所共有的公共接口。4.具体产品(Concrete Product)角色 抽象模式所创建的具体实例对象总结:抽象工厂中方法对应产品结构,具体工厂对应产品族。
- 代码实现:抽象Fruit(水果)类:[java]package com.qianyan.product;public interface Fruit {/*** 采集*/public void get();}抽象产品结构类(苹果、香蕉):[java]package com.qianyan.bean;import com.qianyan.product.Fruit;public abstract class Apple implements Fruit{/*** 采集*/public abstract void get();}[java]package com.qianyan.bean;import com.qianyan.product.Fruit;public abstract class Banana implements Fruit{/*** 采集*/public abstract void get();}抽象产品类的实现:产品族(北方苹果、香蕉;南方苹果、香蕉):[java]package com.qianyan.bean.impl;import com.qianyan.bean.Apple;public class NorthApple extends Apple{@Overridepublic void get() {System.out.println("生产北方苹果!");}}[java]package com.qianyan.bean.impl;import com.qianyan.bean.Banana;public class NorthBanana extends Banana{@Overridepublic void get() {System.out.println("生产北方香蕉!");}}[java]package com.qianyan.bean.impl;import com.qianyan.bean.Apple;public class SourthApple extends Apple{@Overridepublic void get() {System.out.println("生产南方苹果!");}}[java]package com.qianyan.bean.impl;import com.qianyan.bean.Banana;public class SourthBanana extends Banana{@Overridepublic void get() {System.out.println("生产南方香蕉!");}}抽象工厂类(对应产品结构类):[java]package com.qianyan.factory;import com.qianyan.product.Fruit;/*** 抽象工厂类* @author hadoop**/public interface FruitFactory {//获取苹果public Fruit getApple();//获取香蕉public Fruit getBanana();}抽象工厂的实现类(对应产品族):[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();}}顾客类:[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 {//获得北方生产链NorthFactory f1 = new NorthFactory();//通过NorthFactory来获取北方Apple实例对象Fruit northApple = f1.getApple();northApple.get();//通过NorthFactory来获取北方Banana实例对象Fruit northBanana = f1.getBanana();northBanana.get();//获得南方生产链SourthFactory f2 = new SourthFactory();//通过SourthFactory来获取南方Apple实例对象Fruit sourthApple = f2.getApple();sourthApple.get();//通过SourthFactory来获取南方Banana实力对象Fruit sourthBanana = f2.getBanana();sourthBanana.get();}}