享元模式

using System;
using System.Web;
using System.Collections;

//面向对象的思想很好地解决了抽象性的问题，一般也不会出现性能上的问题。但是在某些情况下，对象的数量可能会太多，从而导致了运行时的代价。
//那么我们如何去避免大量细粒度的对象，同时又不影响客户程序使用面向对象的方式进行操作？
//运用共享技术有效地支持大量细粒度的对象。[GOF 《设计模式》]

//场景：各位同学，把你们的亲戚朋友的详细信息都统计过来哦  假设每个人的名字是唯一的，实在不服。就拿身份证号来说事

public partial class DesignPattern_Flyweight : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        PeopleFactory peopleFactory = PeopleFactory.CreatFactory();
        Peoples a = peopleFactory.GetPeople("李大华", "李明他爹", "193");
        a.Print();
        Peoples b = peopleFactory.GetPeople("李大华", "李小明他二叔子", "193");
        b.Print();
        Peoples c = peopleFactory.GetPeople("李大华", "李二明他舅舅", "193");
        c.Print();
        Peoples d = peopleFactory.GetPeople("陈水扁", "小泉他丈人", "156");
        d.Print();
        Peoples g = peopleFactory.GetPeople("陈水扁", "BUS他小蜜", "156");
        g.Print();
        Peoples f = peopleFactory.GetPeople("棒子", "美国的狗", "322");
        f.Print();
        Response.Write("档案总人数" + peopleFactory.GetCount()+"<br>");

      
        NewPeople p = new NewPeople(a);
        p.Color = "yellow";
        NewPeople p2 = new NewPeople(a);
        p2.Color = "Red";

        p2.Prints();
        p.Prints();

 

    }
}

public class Peoples
{
    public string Name;
    public string Wight;
    public string Identity;
    public Peoples(string name)
    {
        this.Name = name;
    }
    public void Print()
    {
        HttpContext.Current.Response.Write("家属姓名:" + Name + " 体重:" + Wight + " 身份:" + Identity + "<br>");
    }
}

public class PeopleFactory
{
    public static PeopleFactory peopleFactory;
    public static PeopleFactory CreatFactory()
    {
        if (peopleFactory == null)
        {
            peopleFactory = new PeopleFactory();
        }
        return peopleFactory;
    }
    public int GetCount()
    {
        return htPeoples.Count;
    }

    Hashtable htPeoples = new Hashtable();

    public Peoples GetPeople(string name, string Identity, string weight)
    {
        Peoples people = (Peoples)htPeoples[name];
        if (people == null)
        {
            people = new Peoples(name);
            people.Wight = weight;
            htPeoples.Add(name, people);
        }
        people.Identity = Identity;
        return people;
    }
}

//关于享元的一点思考，扩展
public class NewPeople
{
    Peoples P;

    public NewPeople(Peoples p)
    {
        this.P = p;
    }
    public string Color;

    public void Prints()
    {
       
        HttpContext.Current.Response.Write(this.Color);
        P.Print();
    }
}