How do I transfer a file SECURELY ???

[Ofer Corshid]

Hi,

I have a Client/Server application. The client side gets data through an
applet, "sitting" on a web-site which any user can surf to, enter data to
this applet, the server will process this data, and the client will get
the results.

The processing done by the server requires fetching a file from the user.
I have understand that building FTP client to get and put the file is OK,
but the problem is that the implemenatations of secure FTP are rare or
not practical.

I have understood that I can transfer the file using HTTP Post with a HTTPs
connection (HTTP over a SSL (secure socket layer)).
Can someone give an example how can I do this using JAVA?
What classes provide this service? URL etc.?

Thank You