<listener> problem

Hello all

I am new to XML, so sorry for this silly post. I am trying to use the <listener> to call my Servlet, which has implemented ServletContextListener and saved in ROOT/WEB-INF/classes, when the Tomcat server starts.

However, Tomcat gave me these errors when it's starting:
--------------------------------------------------------------------------------
org.xml.sax.SaxParseException: Element type "listener" must be declared.
[ERROR] Digester -- Parse Error at line 10 column 12: Element type "listener" must be declared
[ERROR] Digester -- Parse Error at line 11 column 12: Element type "listener" must be declared
[ERROR] Digester -- Parse Error at line 45 column 11: The content of Element type "web-app" must match "<icon?, display name?, description?, distributable?, content param*. servlet*, servlet-mapping, session-config*, mime-mapping*, welcome-file-list*, error-page*, taglib*, resource-ref*, security-constraint*, login-config*, security-role*, env-entry*, ejb-ref*>".>
--------------------------------------------------------------------------------
This is my web.xml:

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>

<!-- Listeners -->
<listener>
<listener-class>
InterestCounter
</listener-class>
</listener>

<security-constraint>
<web-resource-collection>
<web-resource-name>Security</web-resource-name>
<url-pattern>/client/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>administrator</role-name>
<role-name>client</role-name>
</auth-constraint>
</security-constraint>

<security-constraint>
<web-resource-collection>
<web-resource-name>Security</web-resource-name>
<url-pattern>/administrator/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>administrator</role-name>
</auth-constraint>
</security-constraint>

<login-config>
<auth-method>FORM</auth-method>
<form-login-config>
<form-login-page>/login.html</form-login-page>
<form-error-page>/login_error.html</form-error-page>
</form-login-config>
</login-config>

</web-app>
--------------------------------------------------------------------------------
Please anyone tell me what thing goes wrong with my code. Many many thanks!!

Viola

Try throwing this on the top of your file. Replace the part you have that's similar to it.

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">

The problem is you're trying to use an out of date version of the DTD. Be sure you're using Tomcat 4.0 or better, though.