.htaccess 如何强制所有首页的 URL 301 跳转到 https://www.example.com ???

[miao]

假设 域名是 example.com
那么如何设置 .htaccess ???
将如下三个首页 URL 跳转到 https://www.example.com
http://example.com
https://example.com
http://www.example.com

[alect]

#跳转所有非 https 请求到 https
RewriteCond %{HTTPS} off
RewriteRule (.*) https://www.example.com %{REQUEST_URI} [L,R=301,NC]
#跳转裸域 ssl 到 www ssl
RewriteCond %{HTTP_HOST} ^example.com [NC]
RewriteRule (.*) https://www.example.com .com%{REQUEST_URI} [L,R=301,NC]