How can i change upload file name?

hi
I performed a upload Jsp page by OJSP file access in jdeveloper,and it can upload file!
but i want to change uplaod file name!
How can i do?
Any help will be appreciated!
Thanks
Jiawei Zhao

My questions are
1) when use oreilly package to do file upload , it looks like i line of code is enough to store the upload file in the
file direction.
MultipartRequest multi =
        new MultipartRequest(request, dirName, 10*1024*1024); // 10MB
why some example still use FileOutputStream?
outs = new FileOutputStream(UPLOADDIR+fileName);
    filePart.writeTo(outs);
   outs.flush();
outs.close();
2) can I rename the file name when I use oreilly package?

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