web.xml导致的tomcat服务器错误，望高手指点
在<tomcat安装目录>\webapps中创建了一个filter目录。
并创建filter\WEB-INF\web.xml文件，内容如下：
<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">

<filter>
<filter-name>FirstFilter</filter-name>
<filter-class>FirstFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>FirstFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<filter-mapping>
<filter-name>FirstFilter</filter-name>
<servlet-name>default</servlet-name>
</filter-mapping>

<filter-mapping>
<filter-name>FirstFilter</filter-name>
<url-pattern>/test.html</url-pattern>
</filter-mapping>

</web-app>

重启 tomcat服务器，tomcat服务器命令行窗口出现如下错误：
2009-2-14 23:09:49 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2009-2-14 23:09:49 org.apache.catalina.core.StandardContext start
严重: Context [/filter] startup failed due to previous errors

请高手指点一下这是什么原因？
该如何解决？

[解决办法]
你的 <filter-mapping> 多了两个改一下：

XML code

<?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"     version="2.5">         <filter>         <filter-name>FirstFilter </filter-name>         <filter-class>FirstFilter </filter-class>         <init-param>             <param-name>encoding </param-name>             <param-value>GB2312 </param-value>         </init-param>     </filter>         <filter-mapping>         <filter-name>FirstFilter </filter-name>         <url-pattern>/* </url-pattern>     </filter-mapping> </web-app>