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http.conf配置文件添加修改如下：
# Virtual Hosting Map
RewriteEngine on
RewriteMap lowercase int:tolower
RewriteMap vhost txt:/usr/local/apache2/conf/vhost.map
RewriteCond ${lowercase:%{SERVER_NAME}} ^(.+)$
RewriteCond ${vhost:%1} ^(/.*)$
RewriteRule ^/(.*)$ %1/$1
vhost.map文件中添加域名和网站路径:
www.site1.com /www/site1 www.site2.com /www/site2
