nginx下配置url重写！解决思路

nginx下配置url重写！
hostname/infor/index.php?q=ssq
hostname/ssq_index.html
我想把上面的url重写成下面的形式，谢谢大家！

------解决方案--------------------

RewriteEngine On
RewriteBase /
RewriteRule ^([0-9_a-z]+)_index.html$ infor/index.php?q=$1 [L,R=301]


仅供参考
------解决方案--------------------
RewriteEngine On
RewriteRule ^(.*)_index.html$ /infor/index.php?q=$1 [L]