IIS: <rule name="已导入的规则 1-1" stopProcessing="true"> ???????????????????<match url="^(.*)$" ignoreCase="false" /> ???????????????????<conditions logicalGrouping="MatchAll"> ???????????????????????<add input="{HTTP_HOST}" pattern="^maijiaxinyu.com" /> ???????????????????</conditions> ???????????????????<action type="Redirect" url="http://www.maijiaxinyu.com/{R:1}" redirectType="Permanent" /> ???????????????</rule>Apache :
RewriteEngine OnRewriteCond %{HTTP_HOST} ^ffff.com [NC]RewriteRule ^(.*)$ http://www.ffff.com/$1 [L,R=301]不带 www 跳转 到 带 www 网站..
原文地址：https://www.cnblogs.com/whm-blog/p/9396231.html