简单工厂模式 Simple Factory

Simple Factory模式（又称Static Factory模式）

一个Simple Factory生产成品，而对客户端隐藏产品产生的细节。实作时定义一个产品介面（interface），并透过特定静态方法来建立成品。

假设有一个水果工厂，购买水果的客人不用知道水果是如何制作的，他只要知道如何吃水果就可以了。

/** *  * @author Jerval * @date 2011-4-11 */public interface IFruit {public void eat();}/** *  * @author Jerval * @date 2011-4-11 */public class Apple implements IFruit{public void eat() {System.out.println("eat an apple");}}/** *  * @author Jerval * @date 2011-4-11 */public class Banana implements IFruit{public void eat() {System.out.println("eat an banana");}}/** *  * @author Jerval * @date 2011-4-11 */public class FruitFactory {/** * generate fruit factory *  * @param clazz * @return */public static IFruit getFruit(String fruitName){if("apple".equalsIgnoreCase(fruitName)){return new Apple();}else if("banana".equalsIgnoreCase(fruitName)){return new Banana();}else{System.out.println("can not find the fruit named:"+fruitName);}return null;}}/** *  * @author Jerval * @date 2011-4-11 */public class MainClass {public static void main(String[] args) {Apple apple = (Apple) FruitFactory.getFruit("apple");Banana banana = (Banana) FruitFactory.getFruit("banana");apple.eat();banana.eat();}}