求URL重写正则表达式

求URL重写正则表达式

希望可以把http://www.163.com/enterpriseColumn.aspx?userId=aaaa 重写成 http://www.163.com/aaaa

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<configSections>
    <section name="urlrewritingnet" restartOnExternalChanges="true" requirePermission="false" type="UrlRewritingNet.Configuration.UrlRewriteSection, UrlRewritingNet.UrlRewriter"/>
  </configSections>
  <urlrewritingnet rewriteOnlyVirtualUrls="true" contextItemsPrefix="QueryString" defaultPage="default.aspx" defaultProvider="RegEx" xmlns="http://www.urlrewriting.net/schemas/config/2006/07">
    <rewrites>
      <add name="Rewrite" virtualUrl="^/jmx/(.*)" rewriteUrlParameter="ExcludeFromClientQueryString" destinationUrl="enterpriseColumn.aspx?userId=$2" rewrite="Domain" ignoreCase="true"/>
    </rewrites>
  </urlrewritingnet>