This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Spring has such a listener class already called ContextLoaderListener. Try using that. You also might have to set a <context-param> to point to your config files, unless you use the naming convention of applicationContext.xml and put that in the WEB-INF directory.