凹丫丫网络社区 » 【网页编程】 » 中文分词搜索,asp拆词搜索,asp智能分词搜索

Amm 发表于 2008-5-19 18:36

中文分词搜索,asp拆词搜索,asp智能分词搜索

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<P>在做一个网站时，老板让实现像百度那样的搜索功能，以前<A class=ReplaceKeyword href="http://www.knowsky.com/asp.asp" target=_blank>asp</A>实现的都是模糊搜索，匹配查询。没办法。到网上搜搜看，我发现网上提供的方法有这几种，一是建个词库，二是用分词组件，三就是我说的这种，自动分词技术，不过也不是智能的分词，只是隔两个词匹配。最好的是建个词库，根据用户的输入来扩充词库，但对于中小型网站，这可能不太需要。</P>
<P>这是我说的第三种分词搜索，代码如下：使用方法就不说了。</P>
<P>＜%&nbsp;&nbsp; <BR>Function AutoKey(strKey)&nbsp;&nbsp; <BR>CONST lngSubKey=2&nbsp;&nbsp; <BR>Dim lngLenKey, strNew1, strNew2, i, strSubKey&nbsp;&nbsp; </P>
<P>’检测字符串的合法性，若不合法则转到出错页。出错页你可以根据需要进行设定。&nbsp;&nbsp; </P>
<P>if InStr(strKey,"=")＜＞0 or InStr(strKey,"`")＜＞0 or InStr(strKey,"")＜＞0 or InStr(strKey," ")＜＞0 or InStr(strKey,"　")＜＞0 or InStr(strKey,"")＜＞0 or InStr(strKey,chr(34))＜＞0 or InStr(strKey,"\")＜＞0 or InStr(strKey,",")＜＞0 or InStr(strKey,"＜")＜＞0 or InStr(strKey,"＞")＜＞0 then&nbsp;&nbsp; <BR>Response.Redirect "error.htm"&nbsp;&nbsp; <BR>End If&nbsp;&nbsp; <BR>lngLenKey=Len(strKey)&nbsp;&nbsp; <BR>Select Case lngLenKey&nbsp;&nbsp; <BR>Case 0 若为空串，转到出错页&nbsp;&nbsp; <BR>Response.Redirect "error.htm"&nbsp;&nbsp; <BR>Case 1 若长度为1，则不设任何值&nbsp;&nbsp; <BR>strNew1=""&nbsp;&nbsp; <BR>strNew2=""&nbsp;&nbsp; <BR>’Case Else 若长度大于1，则从字符串首字符开始，循环取长度为2的子字符串作为查询条件&nbsp;&nbsp; <BR>For i=1 To lngLenKey-(lngSubKey-1)&nbsp;&nbsp; <BR>strSubKey=Mid(strKey,i,lngSubKey)&nbsp;&nbsp; <BR>strNew1=strNew1 &amp; " or U_Name like %" &amp; strSubKey &amp; "%"&nbsp;&nbsp; <BR>strNew2=strNew2 &amp; " or U_Info like %" &amp; strSubKey &amp; "%"&nbsp;&nbsp; <BR>Next&nbsp;&nbsp; <BR>End Select&nbsp;&nbsp; <BR>’得到完整的SQL语句&nbsp;&nbsp; </P>
<P>AutoKey="Select * from T_Sample where U_Name like %" &amp; strKey &amp; "% or U_Info like %" &amp; strKey &amp; "%" &amp; strNew1 &amp; strNew2&nbsp;&nbsp; <BR>End Function&nbsp;&nbsp; <BR>%＞</P></SPAN><!--正文内容结束--></DIV>

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