Hi Randy
This is what I do in my application to export data to user in csv\xls file.
Here is the code snippet from my action class:-
String filename = (String)session.getAttribute("Export_FileName");
response.setHeader("Content-disposition","attachment;filename="+filename);
response.setContentType("text/html");
PrintWriter pw = response.getWriter();
pw.println(strExportData);
pw.flush();
pw.close();
return mapping.findForward("success");
//Tilak