We had a problem where we needed to upload File to the web based system (JSP) using Ajax Upload. My friend, Jayasanka found this JQuery fix to this problem to get this to the Server and then using Commons Upload we access the uploaded file from Java.

Anyhow, here’s the code for the Java backend using Apache Commons. There’s another article for the front end code which uses JQuery file uploading

The code of the Current Apache Commons FileUpload which was used in the time of posting (quoting from the documentation) is as follows,

// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// Parse the request
List  = upload.parseRequest(request);

We had an Older Version of package where the above classes wasn’t available. This is the code we used:

FileItemFactory itemFactory = new DefaultFileItemFactory();
FileUpload fileUpload = new FileUpload(itemFactory);
List files = fileUpload.parseRequest(req.request);

Both of the versions returns FileItems. The first one returns the newer DiskFileItem and the older returns DefaultFileItems, which both has neat methods with mucking around with files :)