apache 配置域名转向(没有3个人，（www）转到www)
<VirtualHost *>
ServerName www.server110.com
DocumentRoot /home/homepage/www/public
<Directory "/home/homepage/www/public/">
AllowOverride none
</Directory>
</VirtualHost>
<VirtualHost *>
ServerName server110.com
RedirectMatch ^/(.*)$ http://www.server110.com/$1 #这里一定要加上http://前缀，否则跳转会出错
</VirtualHost>
最后，重启apache生效