编辑.htaccess文件,不带www,301跳转到带www的域名:
RewriteEngine on RewriteCond %{HTTP_HOST} ^1.com$ RewriteRule ^(.*)$ http://www.1.com [R=301,L]
旧域名1.com做301跳转到新域名2.com :
RewriteEngine on RewriteCond %{HTTP_HOST} ^www.1.com$ [OR] RewriteCond %{HTTP_HOST} ^1.com$ RewriteRule ^(.*)$ http://www.2.com [R=301,L]
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