we use a Tomcat Web Server running as root.

Now I have a problem:
We wrote an upload-Servlet to upload several files in a special directory in
/home/myuser/upload.
It works good, but the file owner is root and not myuser and I want to change
the owner (like CHOWN).
The Admin does not want to give me the root-PW.
Perhaps someone knows a way to change the owner of the uploaded file during the
upload process.