设计模式--享元模式

1 享元模式：通过共享技术有效的支持大量细粒度的对象。

代码：

public abstract class WebSite {

    public abstract void user(User user);

}
public class ConcreteWebSite extends WebSite {

    private String name;

    public ConcreteWebSite(String name) {
        this.name = name;
    }

    @Override
    public void user(User user) {
        // TODO Auto-generated method stub
        System.out.println("name:"+name+" "+user.getName());
    }
}

工厂：

public class WebFactory {

    private Hashtable webSite = new Hashtable();

    public WebFactory() {
        webSite.put("A", new ConcreteWebSite("A"));
        webSite.put("B", new ConcreteWebSite("B"));
        webSite.put("C", new ConcreteWebSite("C"));
    }

    /**
     * 获取网站对象
     * @param name
     * @return
     */
    public WebSite getWebSite(String name) {
        if (!webSite.containsKey(name)) {
            webSite.put(name, new ConcreteWebSite(name));
        }
        return webSite.get(name);
    }
}

测试：

public class TextMain {

    public static void main(String[] args){
        WebFactory webFactory=new WebFactory();
        WebSite webSite01=webFactory.getWebSite("A");
        webSite01.user(new User("01号"));

        WebSite webSite02=webFactory.getWebSite("B");
        webSite02.user(new User("01号"));
    }
}

对于享元模式，目前对其的理解只停留在表面，未完待续。。。