实现搜索结果的关键词变色标注的程序(使用正则表达式)

实现搜索结果的关键词变色标注的程序(使用正则表达式)

<%
' 以前写全文检索程序的时候写的.
' 原创 by 飞鸟@dev-club.com
' Email: flybird@dev-club.com
' ie5.5 脚本引擎 required

     dim patern
     dim found
    
     dim str
     dim result
    
     patern="(a)|(b)"
     str=" A dog fall in love with a cat. Can you believe?"
     result=""    
     call getMatchText(str,result,false)
     Response.Write result

     sub getMatchText(byref str,byref result,isNeedTrunc)
         'on error resume next
         Dim regEx, Match, Matches
         dim tStr
         Set regEx = New RegExp          ' 建立正则表达式。        
         regEx.Pattern = (patern)     ' 设置模式。
         regEx.IgnoreCase = True          ' 设置是否区分字符大小写。
         regEx.Global = True          ' 设置全局可用性。
         Set Matches = regEx.Execute(str)    ' 执行搜索。    
         if err.number<>0 then
             response.write "错误1：" & err.description
             err.clear
             exit sub
         end if
         if matches.count <>0 then
             dim startIndex            
             dim myMatchValue
             startIndex=1
             for each match in matches
                 if (instr(str,match.value)>0) then
                     if instr(str,match.value)-50 >0 then
                         startIndex=instr(str,match.value)-50
                     else
                         startIndex=1
                     end if
                     myMatchValue=match.value
                     exit for
                 end if
             next
             if isNeedTrunc then
                 result= (mid(str,startIndex,strLength(myMatchValue)+100))
             else
                 result= (str)    
             end if
             for each match in matches
                 if not(instr(result,"<font color=red>" & match.value & "</font>")>0) then
                     result=replace(result,match.value,"<font color=red>" & match.value & "</font>" )
                 end if
             next
             found=true
         else
             found=false
         end if    
         set regEx=nothing
     end sub
    
%>