pass byte[] , file parameter to a method java

I m confused to how to pass byte array and file to a method in Java : when I call enregistre method : enregistre(img3File, file3) and enregistre(img4File, file4) enregistre(img5File, file5) , it doesn t upload the file to the database, but when I call the part of program without method( I repeat the code with :img2File and file2 ) it worked, I dont want to repeat the code 5 times, I beleive there are a solution , help me to figure out what is wrong when I call the method please.

@RequestMapping(value="/save",method=RequestMethod.POST)
public String add (
               @RequestParam("photos") MultipartFile file,
               @RequestParam("photos2") MultipartFile file2,
               @RequestParam("photos3") MultipartFile file3,
               @RequestParam("photos4") MultipartFile file4,
               @RequestParam("photos5") MultipartFile file5)


    {
               byte[] img1File=null;

                try {
//////////////////////// part1
                     img1File= file.getBytes();
                     BufferedOutputStream stream;
                     stream = new BufferedOutputStream(new FileOutputStream(new File("ben1")));

                     stream.write(img1File);
                     stream.close();
//////////////////// end part 1 
                } catch (FileNotFoundException e) {

                    e.printStackTrace();
                } catch (IOException e) {

                    e.printStackTrace();
                }

                 // here I repeat the code and I don t want to repeat it    
                byte[] img2File=null;

                try {
////////////////////////  part 2 
                     img2File= file2.getBytes();
                     BufferedOutputStream stream;
                     stream = new BufferedOutputStream(new FileOutputStream(new File("ben1")));

                     stream.write(img2File);
                     stream.close();
////////////////////////end   part 2 

                } catch (FileNotFoundException e) {

                    e.printStackTrace();
                } catch (IOException e) {

                    e.printStackTrace();
                }

                byte[] img3File=null;
                enregistre(img3File, file3);

                byte[] img4File=null;
                enregistre(img4File, file4);

                byte[] img5File=null;
                enregistre(img5File, file5);

        Annonce annonce=new Annonce();

        annonce.setPhotos(img1File);
        annonce.setPhotos2(img2File);
        annonce.setPhotos3(img3File);
        annonce.setPhotos4(img4File);
        annonce.setPhotos5(img5File);

        annoncedao.save(annonce);
        return "SuccessAddAnnonce";

    // method
  public void enregistre(byte[] imgFile,MultipartFile file)
    {


        try {
            imgFile= file.getBytes();

             BufferedOutputStream stream;
             stream = new BufferedOutputStream(new FileOutputStream(new File("ben1")));

             stream.write(imgFile);
             stream.close();
        } catch (FileNotFoundException e) {

            e.printStackTrace();
        } catch (IOException e) {

            e.printStackTrace();
        } 

    }