using System;using System.Collections.Generic;using System.Text;namespace Pattern.Singleton
{
/// <summary>
/// 泛型实现单例模式 /// </summary>
/// <typeparam name="T">需要实现单例的类</typeparam> public class Singleton<T> where T : new() { /// <summary> /// 返回类的实例 /// </summary> public static T Instance { get { return SingletonCreator.instance; } } class SingletonCreator { internal static readonly T instance = new T(); } }
}using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using Pattern.Singleton;public partial class Singleton : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { // 使用单例模式，保证一个类仅有一个实例 Response.Write(Singleton<Test>.Instance.Time); Response.Write("<br />"); Response.Write(Singleton<Test>.Instance.Time); Response.Write("<br />"); // 不用单例模式 Test t = new Test(); Response.Write(t.Time); Response.Write("<br />"); Test t2 = new Test(); Response.Write(t2.Time); Response.Write("<br />"); }}public class Test{ private DateTime _time; public Test() { System.Threading.Thread.Sleep(3000); _time = DateTime.Now; } public string Time { get { return _time.ToString(); } }}乐在其中设计模式(C#) - 单例模式(Singleton Pattern),布布扣,bubuko.com
乐在其中设计模式(C#) - 单例模式(Singleton Pattern)
原文：http://www.cnblogs.com/lonelyxmas/p/3590332.html
