.htaccess文件设置如下：

    RewriteEngine on

    RewriteCond %{HTTP_HOST} ^www.yuna.net.cn [NC]

    RewriteRule ^(.*)$ http://yuna.net.cn/$1 [L,R=301]

    RewriteCond %{SERVER_PORT} !^443$

    RewriteRule ^.*$ https://%{SERVER_NAME}%{REQUEST_URI} [L,R]

301跳转设置使用着两行代码

    RewriteCond %{HTTP_HOST} ^www.landui.com [NC]

    RewriteRule ^(.*)$ http://landui.com/$1 [L,R=301]

 http跳转https，使用着两行代码

    RewriteCond %{SERVER_PORT} !^443$

    RewriteRule ^.*$ https://%{SERVER_NAME}%{REQUEST_URI} [L,R]