File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Servlets and the fly likes Servlet can't find intialisation paramters Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Servlets
Bookmark "Servlet can Watch "Servlet can New topic

Servlet can't find intialisation paramters

Richard Scothern
Ranch Hand

Joined: May 25, 2001
Posts: 83
Hi All,
I'm having some problems with Tomcat 3.2.3.
I am creating a servlet which uses intialisation parameters called from the init() method in a servlet. I have set up a web.xml file as follows:
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"




This is in the directory:
The class that uses the intialisation paramters is in the directory:
However, the init method in always sets message as null and repeats never gets set.
public void init(ServletConfig config) throws ServletException {
message = config.getInitParameter("message");
if (message == null) {
message = defaultMessage;
try {
String repeatString = config.getInitParameter("repeats");
repeats = Integer.parseInt(repeatString);
} catch(NumberFormatException nfe) {

I suspect the problem is with my file setup in Tomcat, but I can't figure out what. Should there be a web.xml file in every WEB-INF directory? Do I need to edit server.xml? Any suggestions are appreciated.
Richard Scothern
Mike Curwen
Ranch Hand

Joined: Feb 20, 2001
Posts: 3695

Each webapp you deploy should have its own web.xml file. And it should be in the WEB-INF directory of that webapp. This way, each webapp you make can have its own deployment settings.

Your webapp cannot read the web.xml file of a different webapp, so the settings you have under <tomcat-home>/root/WEB-INF will NOT be read by any other webapp.

You shouldn't need to change anything in server.xml as long as you keep with the webapps directory. Anything under webapps has a convenient "auto-loading" supplied by Tomcat.

[This message has been edited by Mike Curwen (edited November 19, 2001).]
Richard Scothern
Ranch Hand

Joined: May 25, 2001
Posts: 83
Thanks for your reply. Just´┐Ż@one more thing,
The webapp under ROOT should use the web.xml also under ROOT, which is where the classes that use web.xml are. Can I use ROOT as a directory for a webapp.
chanoch wiggers
Ranch Hand

Joined: May 24, 2001
Posts: 245
if you want to use ROOT you can go ahead and do so. this sometimes can simplify your life. All your URLs will simply be in localhost:8080/ without a webapp name. Note though, that the root web applicatino does not have su privilidges so you can still not have cross context references within your code.
Chanoch Wiggers
Architect for Professional Java Mobile Programming

chanoch<p><a href="" target="_blank" rel="nofollow">Author of Professional Apache Tomcat</a></p>
I agree. Here's the link:
subject: Servlet can't find intialisation paramters
It's not a secret anymore!