file upload library for GWT including client and server classes
GWTUpload is a library for uploading files to web servers. It has two components written in java, the server side with servlet and utility classes, and the client side that is compiled into javascript using gwt. There are different Uploader types available like SingleUploader and MultiUploader, handling the amount of files which can be uploaded. The Uploader also supports a restriction to a list of valid extensions.