压缩JS，CSS的过滤器GZIPFilter

http://www.onjava.com/pub/a/onjava/2003/11/19/filters.html作者写了两个过滤器，一个是压缩过滤器，另外一个是缓存过滤器，这里只说一下GZIPFilter压缩过滤器。
<filter>
    <filter-name>Compress</filter-name>
    <filter-class>filter.gzipfilter.GZIPFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>Compress</filter-name>
    <url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
    <filter-name>Compress</filter-name>
    <url-pattern>*.html</url-pattern>
</filter-mapping>
    <filter-mapping>
    <filter-name>Compress</filter-name>
    <url-pattern>*.js</url-pattern>
</filter-mapping>
<filter-mapping>
    <filter-name>Compress</filter-name>
    <url-pattern>*.css</url-pattern>
</filter-mapping>

通过FF的Firebug可以看出结果，ext的样式文件ext-all.css原始大小76K压缩过后13K
prototype.js原始大小57K，压缩过后13K,(本地测试)