I've some problems in my Project. I'm working on a web based application which is developed using Servlets and JSP.
My project allows clients to Upload / Download MS Excel sheets.
The problem is I'm using MS Excel 2003 (.xls format) and clients may be using MS Excel 2007 / 2010 (.xlsx) format.
I need a solution or tool in Java for converting between .xls to .xlsx or Vice versa.