.htaccess不会改写“？id =”

I am having issues with some url rewrite tules that wont rewrite "?id="

Example: product?id=123 I want to show it like: product/123

I have tried something like this:

#first option

#Rewriting product.php?id=12 to product-12.html

RewriteEngine on
RewriteRule ^product-([0-9]+)\.html$ product.php?id=$1

#second option

#Rewriting product.php?id=12 to product/ipod-nano/12.html
RewriteEngine on
RewriteRule ^product/([a-zA-Z0-9_-]+)/([0-9]+)\.html$ product.php?id=$2

You have no flags on your rules

# Rewriting product/ipod-nano/12.html to product.php?id=12
RewriteEngine on
RewriteRule ^product/[-\w]+/(\d+)\.html$ product.php?id=$1 [NS,NE,DPI,L]