１、使用什么是全攻Url Rewrite Filter，　Url Rewrite Filter可以用来做什么？Based on the popular and very useful mod_rewrite for apache,使用 UrlRewriteFilter is a Java Web Filter for any J2EE compliant web application server (such as Resin, Orion or Tomcat), which allows you to rewrite URLs before they get to your code. It is a very powerful tool just like Apache's mod_rewrite. URL rewriting is very common with Apache Web Server (see mod_rewrite's rewriting guide) but has not been possible in most java web