求实现搜索功能的好方法

<%
Response.Buffer=True

Const ValidFiles = "htmltxt"
Const RootFld = "./"

Dim Matched
Dim Regex
Dim GetTitle
Dim fs
Dim rfLen
dim RootFolder
Dim DocCount
Dim DocMatchCount
Dim MatchedCount

' ----------------------------------------------
' Procedure: SearchFiles()
' ----------------------------------------------
Public Sub SearchFiles(FolderPath)
Dim fsFolder
Dim fsFolder2
Dim fsFile
Dim fsText
Dim FileText
Dim FileTitle
Dim FileTitleMatch
Dim MatchCount
Dim OutputLine

' Get the starting folder
Set fsFolder = fs.GetFolder(FolderPath)
' Iterate thru every file in the folder
For Each fsFile In fsFolder.Files
' Compare the current file extension with the list of valid target files
If InStr(1, ValidFiles, Right(fsFile.Name, 3), vbTextCompare) > 0 Then
DocCount = DocCount + 1
' Open the file to read its content
Set fsText = fsFile.OpenAsTextStream
FileText = fsText.ReadAll
' Apply the regex search and get the count of matches found
MatchCount = Regex.Execute(FileText).Count
MatchedCount = MatchedCount + MatchCount
If MatchCount > 0 Then
DocMatchCount = DocMatchCount + 1
' Apply another regex to get the html document's title
Set FileTitleMatch = GetTitle.Execute(FileText)
If FileTitleMatch.Count > 0 Then
' Strip the title tags
FileTitle = Trim(replace(Mid(FileTitleMatch.Item(0),8),"","",1,1,1))
' In case the title is empty
If FileTitle = "" Then
FileTitle = "No Title (" & fsFile.Name & ")"
End If
Else
' Create an alternate entry name (if no title found)
FileTitle = "No Title (" & fsFile.Name & ")"
End If
' Create the entry line with proper formatting
' Add the entry number
OutputLine = " " & DocMatchCount & ". "
' Add the document name and link
OutputLine = OutputLine & ""
OutputLine = OutputLine & FileTitle & ""
' Add the document information
OutputLine = OutputLine & "
Criteria matched " & MatchCount
& " times - Size: "
OutputLine = OutputLine & FormatNumber(fsFile.Size / 1024,2 ,-1,0,-1) & "K bytes"
OutputLine = OutputLine & " - Last Modified: " & formatdatetime
(fsFile.DateLastModified,vbShortDate) & "
"
' Display entry
Response.Write OutputLine
Response.Flush
End If
fsText.Close
End If
Next

' Iterate thru each subfolder and recursively call this procedure
For Each fsFolder2 In fsFolder.SubFolders
SearchFiles fsFolder2.Path
Next

Set FileTitleMatch = Nothing
Set fsText = Nothing
Set fsFile = Nothing
Set fsFolder2 = Nothing
Set fsFolder = Nothing
End Sub

' ----------------------------------------------
' Procedure: Search()
' ----------------------------------------------
Sub Search(SearchString)
Dim i
Dim fKeys
Dim fItems

Set fs = CreateObject("Scripting.FileSystemObject")
Set GetTitle = New RegExp
Set Regex = New RegExp

With Regex
.Global = True
.IgnoreCase = True
.Pattern = Trim(SearchString)
End With
With GetTitle
.Global = False
.IgnoreCase = True
.Pattern = ""
End With

RootFolder = Server.MapPath(RootFld)

If Right(RootFld,1) <> "/" Then
RootFld = RootFld & "/"
End If

If Right(RootFolder, 1) <> "\" Then
RootFolder = RootFolder & "\"
End If
rfLen = Len(RootFolder) + 1

SearchFiles RootFolder

If MatchedCount = 0 Then
Response.Write " No Matches Found.
"
End If

Set Regex = Nothing
Set GetTitle = Nothing
Set fs = Nothing

End Sub

%>

记个地址以后有时间慢慢看