There is only one file type that uses the .JSPX extension:
XML Java Server Page
XHTML Web page generated from a server using JSP functions; used for providing dynamic content on the Web; similar to a .JSP file, but uses XML syntax; can be edited with Web development program or a basic text editor.
JSPX files can be run on any Web browser that supports Java Server Pages with the Java Virtual Machine.
Updated: August 30, 2010