jsp 用urlrewrite 实现URL 重写【转载】
是否看到别人的网站网址名都不带后缀名比较酷，比如qq空间的地址，其实用urlrewrite这个包很容易就实现了。
    下面是使用说明：

1.下载urlrewrite,官方下载地址：http://tuckey.org/urlrewrite/dist/urlrewritefilter-2.6.zip

2.解压缩文件，压缩包内文件copy到项目中(压缩包位置 -> 项目位置)：

urlrewrite-2.6.0-src/webapp/WEB-INF/lib/urlrewrite-2.6.0.jar -> WebRoot/WEB-INF/lib/urlrewrite-2.6.0.jar

urlrewrite-2.6.0-src/webapp/WEB-INF/urlrewrite.xml -> WebRoot/WEB-INF/urlrewrite.xml
3.将以下代码添加到web.xml里
Xml代码 
<filter>  
        <filter-name>UrlRewriteFilter</filter-name>  
        <filter-class>  
             org.tuckey.web.filters.urlrewrite.UrlRewriteFilter   
        </filter-class>  
    </filter>  
    <filter-mapping>  
        <filter-name>UrlRewriteFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
Xml代码
<filter> 
        <filter-name>UrlRewriteFilter</filter-name> 
        <filter-class> 
            org.tuckey.web.filters.urlrewrite.UrlRewriteFilter  
        </filter-class> 
    </filter> 
    <filter-mapping> 
        <filter-name>UrlRewriteFilter</filter-name> 
        <url-pattern>/*</url-pattern> 
    </filter-mapping> 

<filter>
        <filter-name>UrlRewriteFilter</filter-name>
        <filter-class>
            org.tuckey.web.filters.urlrewrite.UrlRewriteFilter
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>UrlRewriteFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
4.修改urlrewrite.xml
Xml代码 
<?xml version="1.0" encoding="utf-8"?>   
<!DOCTYPE urlrewrite PUBLIC "-//tuckey.org//DTD UrlRewrite 2.6//EN"   
"http://tuckey.org/res/dtds/urlrewrite2.6.dtd">   
  
<!--   
  
Configuration file for UrlRewriteFilter   
http://tuckey.org/urlrewrite/   
  
-->   
<urlrewrite>   
    <rule>   
        <from>^/([a-z]+)$</from>   
        <to type= "forward" >/world.jsp?id=$1</to>   
    </rule>   
    <rule>  
        <from>^/world/(.*)$</from>  
   &nbs