Relaxlife.Net缓存的应用,调用速度要比每次都要从数据库中读要快N陪(原版)精典

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Relaxlife.Net缓存的应用,调用速度要比每次都要从数据库中读要快N陪(原版)精典

缓存的应用,调用速度要比每次都要从数据库中读要快N陪(原版)

<%
Rem =================================================================
Rem = 类:CacheCls
Rem = 说明:缓存的应用
Rem = Revision:1.01 Beta
Rem = 作者:熊氏英雄（cexo255）
Rem = Date:2005/05/6 18:38:10
Rem = QQ:30133499
Rem = MySite:Http://www.Relaxlife.net
Rem = 下载：http://www.relaxlife.net/2005/relaxlife/blogview.asp?logID=178
Rem = QQ群：4341998
Rem = 适用:对一些常用到，而又不常改变的数据放入缓存中，调用速度要比每次都要从数据库中读要快N陪
Rem =================================================================

CacheName = "RL"
Class CacheCls
    Private LocalCacheName, Cache_Data

    Public Property Let Name(ByVal vNewValue)
        LocalCacheName = LCase(vNewValue)
        Cache_Data=Application(CacheName & "_" & LocalCacheName)
    End Property

    Public Property Let Value(ByVal vNewValue)
        Dim N,i,NewValueArr
        If LocalCacheName<>"" Then
            N = CountInStr(vNewValue,"|")
            NewValueArr = Split(vNewValue,"|",-1,1)
            ReDim Cache_Data(N)
            For i = 0 to N
                Cache_Data(i) = NewValueArr(i)
            Next
            Application.Lock
            Application(CacheName & "_" & LocalCacheName) = Cache_Data
            Application.unLock
        Else
            Response.Write "设置缓存出错，或缓存名不能为空，请重新更新缓存"
            Response.End()
        End If
    End Property

    Public Property Get Value()
        If LocalCacheName<>"" Then
            If IsArray(Cache_Data) Then
                Value=Cache_Data
            End If
        Else
            Response.Write "设置缓存出错，或缓存名不能为空，请重新更新缓存"
            Response.End()
        End If
    End Property

    ’取指定缓存中的值
    Public Function GetCacheValue(MyCaheName)
        GetCacheValue = Application(CacheName & "_" & MyCaheName)
    End Function

    ’取所有缓存名
    Public Function GetallCacheName()
        Dim Cacheobj
        For Each Cacheobj in Application.Contents
            GetallCacheName = GetallCacheName & Cacheobj & ","
        Next
        GetallCacheName = Left(GetallCacheName,Len(GetallCacheName)-1)
        GetallCacheName = Replace(GetallCacheName,CacheName & "_","")
    End Function

    ’释放缓存
    Public Sub DelCahe(MyCaheName)
        Application.Lock
        Application.Contents.Remove(CacheName & "_" & MyCaheName)
        Application.unLock
    End Sub

    ’释放所有缓存
    Public Sub RemoveAllCache()
        Dim Cachelist,i
        Cachelist=Split(GetallCacheName(),",")
        If UBound(Cachelist)>0 Then
            For i=0 to UBound(Cachelist)
                DelCahe Cachelist(i)
            Next
        End If
    End Sub

    ’统计字符Char在Str中出现的次数
    Private Function CountInStr(Str,Char)
        CountInStr = 0
        Dim i, CharLen
        CharLen = Len(Char)
        For i = 1 to Len(Str)
            If Mid(Str, i, CharLen) = Char Then CountInStr = CountInStr + 1
        Next
    End Function

End Class

Dim CachePro
Set CachePro = New CacheCls
’设置缓存“cexo255”和它的值："cexo2551|cexo2552|cexo2553|cexo2554|cexo2555"
CachePro.Name = "cexo255"
CachePro.Value = "cexo2551|cexo2552|cexo2553|cexo2554|cexo2555"
’取当前缓存中的值
’CacheArr = CachePro.Value

CachePro.Name = "wxf"
CachePro.Value = "wxf"
CachePro.Name = "dw"
CachePro.Value = "dw"

’释放缓存cexo255
’CachePro.DelCahe("cexo255")

’释放所有缓存
’CachePro.RemoveAllCache

’取cexo255缓存中的值
CacheArr = CachePro.GetCacheValue("cexo255")
If isArray(CacheArr) Then
    For i = 0 to UBound(CacheArr)
        Response.Write CacheArr(i) & "<br>"
    Next
Else
    Response.Write "缓存被释放！！！"
End if

Set CachePro = Nothing
%>

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