Handling multi-part form data without pain

Apache commons uploader has some nice built-in frameworks to handle multi-part form data. In this example part of the form data are file uploads and other parts are form fields. As you will see Apache commons uploader makes this task extremely easy...

        // Check that we have a file upload request
      boolean isMultipart = ServletFileUpload.isMultipartContent(request);

      if (!isMultipart) return ;
    
      // Apache commons upload section
      FileItemFactory factory = new DiskFileItemFactory();
      ServletFileUpload upload = new ServletFileUpload(factory);

      // Parse the request
      List items = new ArrayList() ;
      try {
          items = upload.parseRequest(request);
      } catch (FileUploadException fue) {
          LOGGER.error("Error uploading file: " + fue.toString());
      }
        
      // Process the uploaded items
      Iterator iter = items.iterator();
      while (iter.hasNext()) {
          FileItem item = (FileItem) iter.next();

         if (!item.isFormField()) {
             // **************************************************
             // Process your file input here! *****
             // **************************************************    
          } else {
              String name = item.getFieldName();
              String value = item.getString();
            
              // **************************************************
              // Process your name and value pairs here! *****
             // **************************************************

              LOGGER.debug("Found field " + name + " and value " + value) ;
          }
      }