tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Johnny Kewl" <>
Subject Re: CLASSPATH, .jar files, packages, and so forth
Date Thu, 01 Nov 2007 05:42:19 GMT

Now Tomcat is also a cool pojo application server
----- Original Message ----- 
From: "Mann, Ivan H" <>
To: <>
Sent: Wednesday, October 31, 2007 10:25 PM
Subject: CLASSPATH, .jar files, packages, and so forth

Hi, I actually dont know where to start ;)

No... is probably a good place.

Why not try this, take the layout from a working web app with the packages 
manually installed...
    jar cvf webappname.WAR
Then to deploy, drop it into Tomcat.

There are so many differnet classloaders involved in what you doing that its 
just wrong...
WEB-INF/lib/ MUST NOT be in the Java classpath.
Yes it will work when you run from an external test program, but it will 
screw TC up nicely... never do that.

You seem to be using applets... those classes or Jars, are not in any class 
path... they in the web site and end up in the browsers classpath.
Makes no sense to put those in a class path in the server side...

Why fight the way its meant to be packaged.... why not just try get it into 
a war?

Good luck...

> I have an application  that consists of >150 classes, organized in
> several different packages.
> In the past I have installed the application in
> .../webapps/<appl>/<directories> where the directory tree corresponds
> to the package layout, and this has worked fine.
> I am trying to change this to using .jar files for a couple of
> reasons.  I took one package and created a jar file like this:
> cd webapps/<appl>/
> jar cvf schedule.jar applet/schedule/*.class
> mv schedule.jar WEB-INF/lib
> rm applet/schedule/*.class
> I modified to read WEB-INF/lib and add all .jar
> files to the CLASSPATH before starting tomcat.  Now when I try to
> access one of the classes that I put into schedule.jar it throws a
> NoClassDefFoundError.
> If I run a test program with CLASSPATH pointing to the webapps/<appl>
> directory and WEB-INF/lib/schedule.jar it works fine.  In tomcat it
> doesn't find the class.  I would suspect that there an issue with the
> way I build the jar file, but I can't figure out why it works outside
> of tomcat but not inside.
> What I would really like is a cookbook document telling me how to
> distribute an application in jar files to the web.  I have Googled
> many combinations of words and can't find one.  If anybody has one of
> those I would really appreciate it.  I thing I am missing a step here,
> possibly making the manifest, but I just don't know what that missing
> step is.
> Thanks for the help.
> Ivan Mann

To start a new topic, e-mail:
To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message