apache   rewrite实践问题一个,高分求助!

原来的路径:
http://localhost/dat/SysDb.zip
需要重定向到
http://localhost/dat/ff.html

<VirtualHost   *:80>
        ServerAdmin   webmaster@dummy-host.example.com
        DocumentRoot   d:/test/
        ServerName   localhost
        CustomLog   logs/access.log   common
       
        rewriteengine   on
  RewriteCond   %{REQUEST_URI}   !^/dat/
RewriteRule   /(.*)   http://localhost/dat/ff.html   [P]
</VirtualHost>


哪位高手,给纠正一下,为什么不对?

RewriteEngine   On
RewriteCond   %{REQUEST_URI}   ^(/dat/)
RewriteCond   %{REQUEST_URI}   !^(/dat/ff.html)
RewriteRule   .*     /dat/ff.html   [L]