Code:
RewriteEngine On
# Rewrite requests for sitemap.xml
RewriteRule ^zzxj/sitemap.xml$ /zzxj/sitemap.php?target=google [L]
# Rewrite requests for urllist.txt
RewriteRule ^zzxj/urllist.txt$ /zzxj/sitemap.php?target=yahoo [L]
面的放在.htaccess里的，.htaccess放根目录
重写zzxj/sitemap.xml 至PHP程序