How can I refresh tomcat in the java code?

[Guilherme Orioli]

I'm developing a system that will generate a  file dynamically, and i want
to make it possible to be downloaded from server after it's created. The
problem is that when i link the file, the response i get is that it doesn't
exist.
After a few tests we've figured out that if the file existed previously from
loading tomcat, it's possible to get the file. So, if i reload tomcat, i can
get it... I was wondering if i can refresh the tomcat in the java code.