[FileUpload] Corrupted uploaded binary (MS Excel) file

[Ang Ho Keat]

Hi,
 
I am able to get a text file to upload successfully but not a binary (Excel) file.  
Though the uploading did not report any error, I get an error message when I tried to 
open the uploaded excel file stating that the file is corrupted.
 
Any help will be much appreciated.  Code snippets are appended below.  Running on 
Resin 3.0.8 and win2000 and JDK 1.4.2.
 
************************************
Client-Side HTML
************************************
<form name='myForm' id='myForm' method="POST" action="import.jsp" 
enctype="multipart/form-data">
  <table border="1">
    <tr>
      <td class='header'>Select Excel File for uploading </td>
      <td><input type="file" name="srcfile" size="20"></td>
    </tr>
  </table>
  <p><input type="button" value="Submit" name="B1" onclick='formSubmit()'> <input 
type="reset" value="Reset" name="B2"></p>
</form>
 
************************************
Server-Side JSP
************************************
File resultFile = new File(dir, EXCEL_FILENAME);
   boolean isMultipart = FileUpload.isMultipartContent(request);
   if (!isMultipart) {
      throw new Exception("Request is not 'multipart/form-data'.");
   }
   DiskFileUpload upload = new DiskFileUpload();
   upload.setRepositoryPath(dir);
   List list = upload.parseRequest(request);
   if (list.size()!=1) {
      throw new Exception("Please upload only 1 file.");
   } else if (list.size()==0) {
      throw new Exception("No file uploaded.");
   }
   FileItem fileItem = (FileItem)list.get(0);
   fileItem.write(resultFile);