change upload file name with com.oreilly.servlet.MultipartRequest to handle the file upload

Hjava

1. when use com.oreilly.servlet.MultipartRequest to handle the file upload, can I change the upload file name .

2. how com.oreilly.servlet.MultipartReques handle file upload? do it change to byte ?

what  different?  if I use the following method?

   File uploadedFile = (File) mp.getFile("filename");
               FileOutputStream fos = new FileOutputStream(filename);
                byte[] uploadedFileBuf = new byte[(int) uploadedFile.length()];
               fos.write(data);
             fos.close();

Hjava

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?