anonymous wrote : What is the way to use DB connection using Datasource ? You will have to create a -ds.xml file and place it in the deploy folder of JBoss. See the %JBOSS_HOME%\docs\examples\jca folder for examples. Also see these: http://wiki.jboss.org/wiki/DSdotXML http://wiki.jboss.org/wiki/ConfigDataSources anonymous wrote : If there will be multiple database how to deal with this You can create a datasource for each of those databases. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178459#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...