This one?  <http://www.jdom.org/>

Must you?  Is that what the JDOM documentation
says?  That sounds very unusual.

Usually a library/API is distributed as .jar files,
and the way to use them is to ensure that they
are available on the application's  *classpath* at
compile and (for deployment) runtime.

There are a number of ways to do that, for
deployment.  One is to put the other jar's in
a path 'known to the application jar' (same
directory is easiest) and specify them in the
main jar's manifest file.  Another way that I
have more experience with, is to deploy using
web start, and simply list the other jar's as
resources in the JNLP launch file.

...

I don't provide support for eclipse.  You
might try the eclipse forums, for that.

Let me see if I can help you out.

I have a project called "testing"
I want to add the jdom library to it.
On my machine (Ubuntu Feisty Fawn server) I have the jdom framework
stored in
/usr/local/jdom-1.0

Now if I right click on my project then select
Build Path and then Configure Build Path, I'll select the
Libraries tab then "Add External Jars"
Then I navigate to the /usr/local/jdom-1.0/build directory
and select the jdom.jar file
Then just "Ok" your way back out and you're done.
jdom.jar is now on your project build path.

PS- See if you can start posting in plain text.  Some people will get
annoyed by posting in html because not all news readers can handle it.