设计模式之工厂设计模式详解架构师

工厂方法模式的定义：

定义一个用于创建对象的接口，让子类决定实例化哪一个类，Factory  Method使一个类的实例化延迟到其子类。

package com.blog.ytso.com; 
 
interface Fruit{            //定义一个创建对象的接口 
	public void eat();    
} 
class Apple implements Fruit{ 
	public void eat() { 
		// TODO Auto-generated method stub 
		System.out.println("***吃苹果***"); 
	} 
} 
class Orange implements Fruit{ 
	public void eat() { 
		// TODO Auto-generated method stub 
		System.out.println("***吃橘子***"); 
	} 
} 
class Factory{   //工厂类  
	public static Fruit getInstance(String className){ 
		Fruit fruit = null; 
		try{ 
			fruit = (Fruit)Class.forName(className).newInstance(); 
		}catch(Exception e){ 
			e.printStackTrace(); 
		} 
		return fruit; 
	} 
} 
 
public class FactoryTest { 
 
	/** 
	 * @param args 
	 */ 
	public static void main(String[] args) { 
		// TODO Auto-generated method stub 
		Fruit f = Factory.getInstance("com.blog.ytso.com.Apple"); 
		if(f!=null){ 
			f.eat();     //***吃苹果*** 
		} 
	} 
 
}