1、实例概况

在天猫商城里存在着成天上万的网店，但是天猫所提供的网站模板是一样的，存在许多天猫网店使用同一个网店模板的情况，如果每一个网店都用一个网店对象来表示，因为网店数量巨大，我们需求很多的网店对象来表示，但是，采用同一套网店模板的网店除了里面所展示的内容不一样或者使用权限不同以外，网店的风格样式几乎一致，除了一些定制化的功能，比如logo等，请使用享元模式来模拟此问题。

2、所用模式结构视图

3、实例类图

4、实例实现代码

4.1抽象享元类ZC32OnlineShop（网店类）

public abstract class ZC32OnlineShop {public abstract  void logo(ZC32Logo logo);
}

4.2具体享元类ZC32ZC32Style（风格样式类）

public class ZC32Style extends ZC32OnlineShop {private String style;public ZC32Style(String style) {this.style = style;}public void logo(ZC32Logo logo) {System.out.println("网店风格:   " + style + "          logo:   "+logo.getLogo());}
}

4.3非共享具体享元类ZC32Logo（logo类）

public class ZC32Logo  {private String logo;public ZC32Logo(String logo){this.logo=logo;}public String getLogo() {return logo;
}}

4.4享元工厂类ZC32OnlineShopFactory（网店模板工厂类）

import java.util.HashMap;public class ZC32OnlineShopFactory {	private  HashMap<String, ZC32OnlineShop> shops=new HashMap<String, ZC32OnlineShop>();public ZC32OnlineShop GetStyle(String style){ZC32OnlineShop shop=shops.get(style);if(shop!=null){return shop;}else{shop=new ZC32Style(style);shops.put(style, shop);return shop;}}public int getWebSiteNum(){return shops.size();}
}

4.5客户端测试类ZC32Client

public class ZC32Client {public static void main(String[] args){ZC32OnlineShopFactory shop=new ZC32OnlineShopFactory();ZC32OnlineShop ZC32OnlineShop1=shop.GetStyle("服装类网店");ZC32OnlineShop1.logo(new ZC32Logo("小明的服装"));ZC32OnlineShop ZC32OnlineShop2=shop.GetStyle("服装类网店");ZC32OnlineShop2.logo(new ZC32Logo("帅痞之家"));ZC32OnlineShop ZC32OnlineShop3=shop.GetStyle("服装类网店");ZC32OnlineShop3.logo(new ZC32Logo("男人的最爱"));ZC32OnlineShop ZC32OnlineShop4=shop.GetStyle("数码类网店");ZC32OnlineShop4.logo(new ZC32Logo("华为"));ZC32OnlineShop ZC32OnlineShop5=shop.GetStyle("数码类网店");ZC32OnlineShop5.logo(new ZC32Logo("小米"));ZC32OnlineShop ZC32OnlineShop6=shop.GetStyle("数码类网店");ZC32OnlineShop6.logo(new ZC32Logo("OPPO"));System.out.println("得到所有网店总数为："+shop.getWebSiteNum());
}}