JAVA设计模式之【抽象工厂模式】

1.产品接口，电视和空调

public interface Television // 电视接口
{
	public void play();
}

public interface AirConditioner // 空调
{
	public void changeTemperature();
}

2.电子工厂接口，生产电视和空调

public interface EFactory //E工厂接口
{
	public Television produceTelevision(); // 生产电视
	public AirConditioner produceAirConditioner(); // 生产空调
}

3.具体工厂
海尔工厂生产海尔电视和海尔空调

public class HaierFactory implements EFactory // 海尔工厂
{
	public Television produceTelevision()
	{
		return new HaierTelevision();
	}
	
	public AirConditioner produceAirConditioner()
	{
		return new HairAirConditioner();
	}
}

TCL工厂生产TCL电视和TCL空调

public class TCLFactory implements EFactory // TCL工厂
{
	public Television produceTelevision()
	{
		return new TCLTelevision();
	}
	
	public AirConditioner produceAirConditioner()
	{
		return new TCLAirConditioner();
	}
}

4.具体产品，海尔电视，海尔空调

public class HaierTelevision implements Television  // 海尔电视
{
	public void play()
	{
		System.out.println("海尔电视机播放中......");
	}
}

public class HairAirConditioner implements AirConditioner // 海尔空调
{
	public void changeTemperature()
	{
		System.out.println("海尔空调温度改变中......");
	}
}

TCL电视，TCL空调

public class TCLTelevision implements Television // TCL电视
{
	public void play()
	{
		System.out.println("TCL电视机播放中......");
	}
}

public class TCLAirConditioner implements AirConditioner // TCL空调
{
	public void changeTemperature()
	{
		System.out.println("TCL空调温度改变中......");
	}
}

5.配置与获取配置类

<?xml version="1.0"?>
<config>
	<className>TCLFactory</className>
</config>

import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import java.io.*;
public class XMLUtil
{
//该方法用于从XML配置文件中提取具体类类名，并返回一个实例对象
	public static Object getBean()
	{
		try
		{
			//创建文档对象
			DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = dFactory.newDocumentBuilder();
			Document doc;							
			doc = builder.parse(new File("./src/config.xml"));
		
			//获取包含类名的文本节点
			NodeList nl = doc.getElementsByTagName("className");
            Node classNode=nl.item(0).getFirstChild();
            String cName=classNode.getNodeValue();
            
            //通过类名生成实例对象并将其返回
            Class c=Class.forName(cName);
	  	    Object obj=c.newInstance();
            return obj;
           }   
           	catch(Exception e)
           	{
           		e.printStackTrace();
           		return null;
           	}
		}
}

6.客户端调用

public class Client
{
	public static void main(String args[])
	{
         try
         {
         	EFactory factory; // 电子工厂
         	Television tv; // TV
         	AirConditioner ac; // 空调
         	factory=(EFactory)XMLUtil.getBean();
                // factory = new HaierFactory();
                // factory = new TCLFactory();
         	tv=factory.produceTelevision(); // 工厂生产电视
         	tv.play(); // 电视播放
         	ac=factory.produceAirConditioner(); // 工厂生产空调
         	ac.changeTemperature(); // 空调调节温度
         }
         catch(Exception e)
         {
         	System.out.println(e.getMessage());
         }
	}
}

结果：

TCL电视机播放中......
TCL空调温度改变中......

类图关系如下，