What are the uses of tiles-def.xml file, resourcebundle.properties file, validation.xml file?
tiles-def.xml is is an xml file used to configure tiles with the struts application. You can define the layout / header / footer / body content for your View. See more at http://www.roseindia.net/struts/using-tiles-defs-xml.shtml. The resourcebundle.properties file is used to configure the message (error/ other messages) for the struts applications. The file validation.xml is used to declare sets of validations that should be applied to Form Beans. Fpr more information please visit http://www.roseindia.net/struts/address_struts_validator.shtml.