一般主机空间都支持脚本映射，在空间里做一个 *.html映射到NET4，然后web.config里添加规则，见下文

 <system.webServer>
    <rewrite>
      <rules>
        <rule name="r1">
          <match url="default.html" />
          <action type="Rewrite" url="Default.aspx" />
        </rule>
        <rule name="r10">
          <match url="newsdetail-([0-9]*)-([0-9]*).html" />
          <action type="Rewrite" url="newsdetail.aspx?oid={R:1}&amp;sClass={R:2}" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>