首先，确保空间商的II7有rewriteing的支持；

      其次新建一个web.config文件，将以下代码拷贝到web.config中，并将其拷贝到joomla网站目录下;

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <rewrite>
      <rules>
        <rule name="Security Rule" stopProcessing="true">
          <match url="^(.*)$" ignoreCase="false" />
          <conditions logicalGrouping="MatchAny">
            <add input="{QUERY_STRING}" pattern="mosConfig_[a-zA-Z_]{1,21}(=|\%3D)" ignoreCase="false" />
            <add input="{QUERY_STRING}" pattern="base64_encode.*\(.*\)" ignoreCase="false" />
            <add input="{QUERY_STRING}" pattern="(\&lt;|%3C).*script.*(\>|%3E)" />
            <add input="{QUERY_STRING}" pattern="GLOBALS(=|\[|\%[0-9A-Z]{0,2})" ignoreCase="false" />
            <add input="{QUERY_STRING}" pattern="_REQUEST(=|\[|\%[0-9A-Z]{0,2})" ignoreCase="false" />
          </conditions>
          <action type="CustomResponse" url="index.php" statusCode="403" statusReason="Forbidden" statusDescription="Forbidden" />
        </rule>
        <rule name="SEO Rule">
          <match url="(.*)" ignoreCase="false" />
          <conditions logicalGrouping="MatchAll">
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" pattern="" ignoreCase="false" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" pattern="" ignoreCase="false" />
            <add input="{URL}" negate="true" pattern="^/index.php" ignoreCase="false" />
            <add input="{URL}" pattern="(/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$" />
          </conditions>
          <action type="Rewrite" url="index.php" />
        </rule>
      </rules>
    </rewrite>
 </system.webServer>
</configuration>

最后，开启joomla的seo，如下图所示：