web.xml issue

[Jason Kretzer]

Hello all,
I am having problems with my web.xml file. When I start Tomcat 4.0.4, I get the following on my DOS window:

Starting service Tomcat-Standalone
Apache Tomcat/4.0.3
PARSE error at line 33 column 11
org.xml.sax.SAXParseException: The content of element type "web-app" must match
"(icon?,display-name?,description?,distributable?,context-param*,filter*,filter-
mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welco
me-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,security-const
raint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)".
Starting service Tomcat-Apache
Apache Tomcat/4.0.3

Also, here is my web.xml file. Note:When I delete the portion dedicated to the TopLineGenerator, the HelloWorld servlet comes up fine. But neither comes up when I add it in and I get the message above.

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<!-- name of the servlet to which you are mapping a URL -->
<servlet-name>HelloWorld</servlet-name>
<!-- pattern used to resolve URLs -->
<url-pattern>/HelloWorld</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>TopLineGenerator</servlet-name>
<servlet-class>TopLineGenerator</servlet-class>
</servlet>
<servlet-mapping>
<!-- name of the servlet to which you are mapping a URL -->
<servlet-name>TopLineGenerator</servlet-name>
<!-- pattern used to resolve URLs -->
<url-pattern>/TopLineGenerator</url-pattern>
</servlet-mapping>
</web-app>

Any ideas?
Thanks,
[ June 26, 2002: Message edited by: Jason Kretzer ]

[Mike Curwen]

XML DTD's give you the required structure of XML files. You are throwing a parse exception, so something is wrong with your structure.

As a guide...
(icon?, display-name? ... context-param*, filter* ... servlet*, servlet-mapping* ...)

( - start the element
? - optional
* - can be 0 to many
, - list seperator -> order IS implied.
(and ... is my way of snipping out things)

So the above example could be read out: A web-app element is composed of optionally an icon followed by optionally a display-name followed by zero or more context-params followed by zero or more filters followed by zero or more servlets followed by zero or more servlet-mappings

the "order IS implied" is the big clue.
[ June 26, 2002: Message edited by: Mike Curwen ]

[Anthony Villanueva]

Just list ALL your <servlet> elements first, followed by the <servlet-mapping> elements.