搜了半天，最后按下面这种方法搞定的： （不用xml做配置文件的系统都是耍流氓，像httpd.conf这种东西的层次感太不明确了)
引用
NameVirtualHost *:80
<VirtualHost *:80>
ServerName 111.111.111.111
<Location />
Order deny,allow
Deny from all
</Location>
</VirtualHost>
<VirtualHost*:80>
ServerName www.myblog.com
DocumentRoot /home/me/myblog
…
</VirtualHost>