with formatKey ???

[Mauricio T. Ferraz]

Anybody knows how can I show I CNPJ in this format (33.435.231/0001-27) ???
I my bean I just have number (33435231000127) 
So I have to show with ". "and  " / " 
There are a way to put something in the resource bundle??? What??

[]īs
Mauricio