Upload file jsp code doesn't work? How can I debug

Question

Hi Everyone,
I have the following jsp code that simply adds a new product to the backend database when 'Continue' button is pressed.
if( "Continue".equals(fp.getParameter("Submit")) ) {
     fp.setParameters(prodForm);
     prodForm.setCreateBy(currentUser.getUserID());
     prodForm.save();
     String filename = fp.getFilename("file");
          if( filename != null ) {
          // a file was uploaded
          // set the path to save it
          fp.setFilePath(PHYSICAL_PATH + "uploads\\");
          // we will change the filename to make sure it is unique
          // need to keep the file type
          String fileType = "";
          try { fileType = filename.substring( filename.lastIndexOf(".") ).toLowerCase(); }
          catch( Exception e ) { fileType = ""; }
          fp.saveFile("file", "POS_" + prodForm.getProductID() + fileType);
          prodForm.setSketch("POS_" + prodForm.getProductID() + fileType);
          prodForm.save();
     db.close();
     response.sendRedirect("index.jsp");
     return;
}The code works fine but the upload doesn't work. This is the upload part of the above code:
String filename = fp.getFilename("file");
          if( filename != null ) {
          // a file was uploaded
          // set the path to save it
          fp.setFilePath(PHYSICAL_PATH + "uploads\\");
          // we will change the filename to make sure it is unique
          // need to keep the file type
          String fileType = "";
          try { fileType = filename.substring( filename.lastIndexOf(".") ).toLowerCase(); }
          catch( Exception e ) { fileType = ""; }
          fp.saveFile("file", "POS_" + prodForm.getProductID() + fileType);
          prodForm.setSketch("POS_" + prodForm.getProductID() + fileType);
          prodForm.save();
     db.close();
     response.sendRedirect("index.jsp");So if the file browser, <input type="file" name="file">, has a file, then it saves the file in the upload folder and saves the filename in the database. But it doesn't work, it doesn't save the file in the upload folder nor it saves the filename in the database. I am new to java and jsp so could you tell me what error checking or deguging I can do in jsp to spot the problem.
Thanks,
Zub

Answer 1

where u write the code to upload the file
to server end?