apache域名跳转怎么网址上多出个/来？

现在是输入xxx.com/123.htm 跳转到 www.xxx.com//123.htm 怎么多出个/来？ 以下是.conf文件 <VirtualHost *:80>         DocumentRoot /alidata/www/s         ServerName www.xxx.com         ServerAlias xxx.com         DirectoryIndex index.html index.php index.htm         <Directory "/alidata/www/s">             Options -Indexes FollowSymLinks             AllowOverride all             Order allow,deny             Allow from all         </Directory>         <IfModule mod_rewrite.c>                 RewriteEngine On                 RewriteCond "%{HTTP_HOST}" "^xxx.com" [NC]                 RewriteRule "^(.*)$"   http://www.xxx.com/$1 [R=permanent,L]                 #RewriteRule ^(.*)-htm-(.*)$ $1.php?$2                 #RewriteRule ^(.*)/simple/([a-z0-9\_] \.html)$ $1/simple/index.php?$2         </IfModule>         ErrorLog "/alidata/log/httpd/s-error.log"         CustomLog "/alidata/log/httpd/access/s.log" common </VirtualHost>