This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
put the [ActionClassName]-validation.xml in the package where you put your action class, then in struts.xml, let your package extends strut-default. All the input value will pass through the validation intercepter, and so is the validation done. For more information, please refer to http://struts.apache.org/2.x/docs/validation.html