1.请确保Apache已经打开Mod_rewrite模块.

2.在网站根目录的.htaccess里加入以下内容

RewriteEngine on
RewriteBase /
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^.*$ https://%{SERVER_NAME}%{REQUEST_URI} [L,R]

3.无需重启服务器,.htaccess文件修改后实时生效.