Creating new directory in the server

[Ronaldo Nazario]

I'm building an application that allows users to upload files into the server, but I don't want to specify a single folder to store all the files. I want to create a folder for each user, the name of the folder would be the username.

I tried to use this code:

    
File dir = new File(ROOT_PATH + "/Public/");
dir.mkdir();
dir.createNewFile();
File saveTo = new File(dir.getName() + "test.pdf");
fileItem.write(saveTo); 

Where "/Public/" is a directory which doesn't exist on the server, therefore I have to create it at runtime.

I think this is more a java.IO question, but as I bumped into it doing a web application I decided to post it here...

Thanks