Java web development bulk upload

I will have to implement the possibility to uploa开发者_开发问答d multiple files (thousands) from a website. I think I will use a FTP client, any suggestion or other idea?

Thanks.

If you're going to be doing this on a regular basis, you might want to take a look at rsync. Unchanged files will not be transferred, saving you on time and bandwidth. You can also tunnel rsync through ssh if you need security.