using System;using System.Collections;using System.Text.RegularExpressions;using System.Web;using System.Web.Caching;using System.Collections.Generic;namespace Pub.Class{    /// <summary>    /// Web缓存管理    /// </summary>    public class WebCache    {        #region 构造器        private WebCache() { }        static WebCache() {            HttpContext context = HttpContext.Current;            if (context != null) { _cache = (Cache)context.Cache; } else { _cache = HttpRuntime.Cache; }        }        #endregion        #region 公有靜态字段        /// <summary>        /// 日缓存因子        /// </summary>        public static readonly int DayFactor = 17280;        /// <summary>        /// 小时缓存因子        /// </summary>        public static readonly int HourFactor = 720;        /// <summary>        /// 分缓存因子        /// </summary>        public static readonly int MinuteFactor = 12;        /// <summary>        /// 秒缓存因子        /// </summary>        public static readonly double SecondFactor = 0.2;        #endregion        #region 私有静态字段        private static readonly Cache _cache;        /// <summary>        /// 缓存因子        /// </summary>        private static int Factor = 5;        #endregion        #region 静态方法        public static IList<CachedItem> GetList(){            IList<CachedItem> list = new List<CachedItem>();            IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();            while (CacheEnum.MoveNext()) {             list.Add(new CachedItem(CacheEnum.Key.ToString(),CacheEnum.Value.GetType().ToString()));            }            return list;        }        /// <summary>        /// 重新设置缓存因子         /// </summary>        /// <param name="cacheFactor"></param>        public static void ReSetFactor(int cacheFactor) { Factor = cacheFactor; }        /// <summary>        /// 清空所有缓存项目        /// </summary>        public static void Clear() {            IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();            ArrayList al = new ArrayList();            while (CacheEnum.MoveNext()) { al.Add(CacheEnum.Key); }            foreach (string key in al){ _cache.Remove(key); }        }        /// <summary>        /// 删除缓存        /// </summary>        /// <param name="pattern">缓存键正则匹配模式</param>        public static void RemoveByPattern(string pattern) {            IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();            Regex regex = new Regex(pattern, RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);            while (CacheEnum.MoveNext()) {                if (regex.IsMatch(CacheEnum.Key.ToString()))                    _cache.Remove(CacheEnum.Key.ToString());            }        }        /// <summary>        /// 删除缓存        /// </summary>        /// <param name="key">缓存键名</param>        public static void Remove(string key) { _cache.Remove(key); }        /// <summary>        /// 增加缓存项目         /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        public static void Insert(string key, object obj) { Insert(key, obj, null, 1); }        /// <summary>        /// 增加缓存项目(缓存时间:小时缓存因子*12)        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="dep">缓存依赖荐</param>        public static void Insert(string key, object obj, CacheDependency dep) { Insert(key, obj, dep, HourFactor * 12); }        /// <summary>        /// 增加缓存项目        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="seconds">缓存秒数</param>        public static void Insert(string key, object obj, int seconds) { Insert(key, obj, null, seconds); }        /// <summary>        /// 增加缓存项目        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="seconds">缓存秒数</param>        /// <param name="priority">缓存优先级</param>        public static void Insert(string key, object obj, int seconds, CacheItemPriority priority) { Insert(key, obj, null, seconds, priority); }        /// <summary>        /// 增加缓存项目        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="dep">缓存依赖项</param>        /// <param name="seconds">缓存秒数</param>        public static void Insert(string key, object obj, CacheDependency dep, int seconds) { Insert(key, obj, dep, seconds, CacheItemPriority.Normal); }        /// <summary>        /// 增加缓存        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="dep">缓存依赖项</param>        /// <param name="seconds">缓存秒数</param>        /// <param name="priority">缓存优先级</param>        public static void Insert(string key, object obj, CacheDependency dep, int seconds, CacheItemPriority priority) {            if (obj != null) {                _cache.Insert(key, obj, dep, DateTime.Now.AddSeconds(Factor * seconds), Cache.NoSlidingExpiration, priority, null);            }        }        /// <summary>        /// 微小缓存        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="secondFactor">缓存秒因子</param>        public static void MicroInsert(string key, object obj, int secondFactor) {            if (obj != null) {                _cache.Insert(key, obj, null, DateTime.Now.AddSeconds(Factor * secondFactor), Cache.NoSlidingExpiration);            }        }        /// <summary>        /// 增加缓存项目        /// </summary>        /// <param name="key"></param>        /// <param name="obj"></param>        public static void Max(string key, object obj) { Max(key, obj, null); }        /// <summary>        /// 最大缓存对象        /// </summary>        /// <param name="key">缓存键名</param>        /// <param name="obj">缓存对象</param>        /// <param name="dep">缓存依赖项</param>        public static void Max(string key, object obj, CacheDependency dep) {            if (obj != null) {                _cache.Insert(key, obj, dep, DateTime.MaxValue, Cache.NoSlidingExpiration, CacheItemPriority.AboveNormal, null);            }        }        /// <summary>        /// 获取缓存对象        /// </summary>        /// <param name="key">缓存键名</param>        /// <returns>返回缓存对象</returns>        public static object Get(string key) { return _cache[key]; }        /// <summary>        /// 根据秒缓存因子计算秒数        /// </summary>        public static int SecondFactorCalculate(int seconds) { return Convert.ToInt32(Math.Round((double)seconds * SecondFactor)); }        #endregion    }}