My experience with the Struts datasource is that it's nothing but trouble, and that
you should avoid using it.
The best practice is to set up a datasource through your application server and then access it in your application through a JNDI lookup. Since you're using WSAD, look in the help documentation and you will find a lot of good information about how to set up a datasource.
This link gives some information specifically about WSAD and MYSQL.
[ August 01, 2006: Message edited by: Merrill Higginson ]