Java file upload in Servlet using Apache commons FileUpload component (sample code)

protected void doPost(HttpServletRequest res, HttpServletResponse response)
		throws ServletException, IOException {
 
	// Commons file upload classes are specifically instantiated
	FileItemFactory factory = new DiskFileItemFactory();
 
	ServletFileUpload upload = new ServletFileUpload(factory);
	ServletOutputStream out = null;
 
	try {
		// Parse the incoming HTTP request
		// Commons takes over incoming request at this point
		// Get an iterator for all the data that was sent
		List items = upload.parseRequest(res);
		Iterator iter = items.iterator();
 
		// Set a response content type
		response.setContentType("text/html");
 
		// Setup the output stream for the return XML data
		out = response.getOutputStream();
 
		// Iterate through the incoming request data
		while (iter.hasNext()) {
			// Get the current item in the iteration
			FileItem item = (FileItem) iter.next();
 
			// If the current item is an HTML form field
			if (item.isFormField()) {
				// Return an XML node with the field name and value
				out.println("this is a form data " + item.getFieldName() + "<br>");
 
				// If the current item is file data
			} else {
				// Specify where on disk to write the file
				// Using a servlet init param to specify location on disk
				// Write the file data to disk
				// TODO: Place restrictions on upload data
				File disk = new File("C:\\uploaded_files\\"+item.getName());
				item.write(disk);
 
				// Return an XML node with the file name and size (in bytes)
				//out.println(getServletContext().getRealPath("/WEB_INF"));
				out.println("this is a file with name: " + item.getName());
			}
		}
 
		// Close off the response XML data and stream
 
		out.close();
		// Rudimentary handling of any exceptions
		// TODO: Something useful if an error occurs
	} catch (FileUploadException fue) {
		fue.printStackTrace();
	} catch (IOException ioe) {
		ioe.printStackTrace();
	} catch (Exception e) {
		e.printStackTrace();
	}
 
}