设计模式之四 抽象工厂模式

大家好，现在咱们来讨论一下抽象工厂模式吧。还是以我之前给的例子（详情可以看之前的简单工厂）但是现在要做出一点假设：

假设 苹果公司和小米公司都有生产 Phone，MP3之类的...（纯粹是为了方便说明）

好了，现在说说产品等级结构和产品族的概念

所谓的产品等级结构：就是指某一类产品的继承结构，比如说电话，它包括IPhone电话和XiaoMi电话，他们就是属于同一个产品等级结构

所谓的产品族：就是指处于不同产品等级结构的一组产品，且是由同一个工厂产生的。比如说 Apple公司既可以生产IPhone，也可以生产IPOD,而小米公司既可以生产XiaoMi手机，也可以生产XiaoMiPod(假设...)

好了，现在让我们来看看UML图吧：

现在看看代码吧

package edu.fjnu.cs.hwb.abstractfactory;

public interface Phone
{
	void call(); 
}

package edu.fjnu.cs.hwb.abstractfactory;

public interface Pod 
{
	void play();
}

package edu.fjnu.cs.hwb.abstractfactory;

public interface AbstractFactory
{
	Phone getPhone(String name);
	Pod getPod(String name);
}

首先是Apple公司的产品

package edu.fjnu.cs.hwb.abstractfactory;

public class IPhone4 implements Phone 
{
	@Override
	public void call()
	{
		System.out.println("this is IPhone4");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class IPhone4s implements Phone
{
	@Override
	public void call()
	{
		System.out.println("this is IPhone4s");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class IPod1 implements Pod 
{
	@Override
	public void play() 
	{
		System.out.println("this is IPod1");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class IPod2 implements Pod 
{
	@Override
	public void play() 
	{
		System.out.println("this is IPod2");
	}
}

package edu.fjnu.cs.hwb.abstractfactory; 

public class XiaoMi2 implements Phone
{
	@Override
	public void call()
	{
		System.out.println("this is XiaoMi2");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class XiaoMi2S implements Phone 
{
	@Override
	public void call() 
	{
		System.out.println("this is XiaoMi2S");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class XiaoMiPod1 implements Pod
{
	@Override
	public void play()
	{
		System.out.println("this is XiaoMiPod1");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class XiaoMiPod2 implements Pod 
{
	@Override
	public void play() 
	{
		System.out.println("this is XiaoMiPod2");
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class AppleFactory implements AbstractFactory 
{
	@Override
	public Phone getPhone(String name) 
	{		
		if ("IPhone4".equalsIgnoreCase(name))
			return new IPhone4();
		else if ("IPhone4s".equalsIgnoreCase(name))
			return new IPhone4s();
		return null;
	}

	@Override
	public Pod getPod(String name) 
	{
		if ("IPod1".equalsIgnoreCase(name))
			return new IPod1();
		else if ("IPod2".equalsIgnoreCase(name))
			return new IPod2();
		return null;
	}

}

package edu.fjnu.cs.hwb.abstractfactory;

public class XiaoMiFactory implements AbstractFactory 
{
	@Override
	public Phone getPhone(String name)
	{		
		if ("XiaoMi2".equalsIgnoreCase(name))
			return new XiaoMi2();
		else if ("XiaoMi2s".equalsIgnoreCase(name))
			return new XiaoMi2S();
		return null;
	}

	@Override
	public Pod getPod(String name)
	{
		
		if ("XiaoMiPod1".equalsIgnoreCase(name))
			return new XiaoMiPod1();
		else if ("XiaoMiPod2".equalsIgnoreCase(name))
			return new XiaoMiPod2();
		return null;
	}
}

package edu.fjnu.cs.hwb.abstractfactory;

public class Client 
{
	public static void main(String[] args)
	{
		AbstractFactory abstractFactory = new AppleFactory();
		Phone phone = abstractFactory.getPhone("Iphone4");
		phone.call();
		phone = abstractFactory.getPhone("Iphone4s");
		phone.call();
		Pod pod = abstractFactory.getPod("Ipod1");
		pod.play();
		pod = abstractFactory.getPod("Ipod2");
		pod.play();
		
		System.out.println();		
		
		abstractFactory = new XiaoMiFactory();
		phone = abstractFactory.getPhone("XiaoMi2");
		phone.call();
		phone = abstractFactory.getPhone("XiaoMi2s");
		phone.call();
		pod = abstractFactory.getPod("XiaoMiPod1");
		pod.play();
		pod = abstractFactory.getPod("XiaoMiPod2");
		pod.play();
	}
}

好了..代码虽然多，但是很简单的..

如果有错误，希望大家指正出来

设计模式之四 抽象工厂模式,布布扣,bubuko.com

设计模式之四 抽象工厂模式

原文：http://blog.csdn.net/hwb1992/article/details/22760185