I do not know anything about Struts2, so I probably cannot help with this. Yes, having spring.jar in WEB-INF/lib is sufficient, provided that the class wanting to access it (the Struts2 BeanSelectionProvider class in this case) is also located in the same WEB-INF/lib. Are you sure that when it is identifying "spring" that it specifically means spring.jar? Is it possible that somewhere the term "spring" is configured in a Struts2 config file (or annotation) but that the object/entity "spring" is not defined anywhere? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4189946#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...