If you get compile error you can use the supplied Team Project Set file
"rap-sandbox-upload-widget.psf", to check out all necessary projects
into your workspace.

1. Select "rap-sandbox-uploadwidget.psf"
2. Right click
3. Choose "Import Project Set..."
4. Follow the instructions in the dialog

The project set file will add these projects to your workspace:

org.apache.commons.fileupload (v1_2)
org.apache.commons.io (v_1_3_2)
org.eclipse.rwt.widgets.uploads.demo (optional, contains an example)

If you have further questions, post to the RAP newsgroup:
http://www.eclipse.org/rap/newsgroup.php

Have fun!