A
Struts web applicatoin requires more than just struts.jar. It requires a number of commons jars as well. The class you mentioned in your post is actually in commons-beanutils.jar. Unjar the struts-blank.war file that comes with the Struts download, and copy all the jars in the WEB-INF/lib directory to your WEB-INF/lib directory. That should solve this problem.