Read data from excel data by JSPDynpage

Hi ,

i have to read data from excel .

i have created  JSPDynpage  component  and followd below link :

http://help.sap.com/saphelp_sm40/helpdata/en/63/9c0e41a346ef6fe10000000a1550b0/frameset.htm  

    try
{ 

FileUpload fu = (FileUpload)
                        this.getComponentByName("myfileupload");

         //    this is the temporary file
         if (fu != null) {
             //    Output to the console to see size and UI.
             System.out.println(fu.getSize());
             System.out.println(fu.getUI());
             //    Get file parameters and write it to the console
             IFileParam fileParam = fu.getFile();
             System.out.println(fileParam);
             //    Get the temporary file name
             File f = fileParam.getFile();
             String fileName = fileParam.getFileName();
             //    Get the selected file name and write ti to the console
             ivSelectedFileName = fu.getFile().getSelectedFileName();
FileItem file = (FileItem) f;
InputStream is;
Workbook wb;
is = file.getInputStream();
wb = WorkbookFactory.create(is);
Sheet sheet = wb.getSheetAt(0);   
int SheetCount = wb.getNumberOfSheets();
myLoc.errorT("#f.SheetCount()#"+SheetCount);
}

Error : java.lang.ClassCastException  at line    FileItem file = (FileItem) f;

Can anyone help me to resolve this issue?

Thanks,

Prasad.