【原】缓存之 HttpRuntime.Cache

 /// <summary>
    /// 设置数据缓存,相对过期
    /// --键值存在时会替换原数据
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="cacheKey">键值</param>
    /// <param name="objObject"></param>
    /// <param name="timeout">相对过期时间,最后一次访问所插入对象时与该对象到期时之间的时间间隔（单位：秒）</param>
    public static void SetRelativeCache<T>(string cacheKey, T objObject, int timeout = 30)//默认30秒过期,30秒不访问就会过期
    {
        try
        {
            if (objObject == null) return;
            var objCache = HttpRuntime.Cache;         
            //相对过期时间,最后一次访问的时间超过了时间间隔后才会到期
            objCache.Insert(TypeName<T>() + cacheKey, objObject, null, Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(timeout), CacheItemPriority.High, null);
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

/// <summary>
    /// 设置数据缓存,绝对过期时间
    /// --键值存在时会替换原数据
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="cacheKey"></param>
    /// <param name="objObject"></param>
    /// <param name="timeout">绝对过期时间（单位：秒,默认300秒以后就会过期）</param>
    public static void SetAbsoluteCache<T>(string cacheKey, T objObject, int timeout = 300)//默认300秒
    {
        try
        {
            if (objObject == null) return;
            var objCache = HttpRuntime.Cache;
            //绝对过期时间,  TimeSpan.Zero
            objCache.Insert(TypeName<T>() + cacheKey, objObject, null, DateTime.Now.AddSeconds(timeout), Cache.NoSlidingExpiration, CacheItemPriority.High, null);           
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }