public boolean creationDossier(ObjectInputStream input, ObjectOutputStream output) throws IOException
    {
        String dir = input.readUTF();
        
        String[] tab = dir.split("/\\\\");
        
        File parent = root;
        for (String child : tab)
            parent = new File(parent,child);

        try
        {
            boolean res = parent.mkdir();
            envoiConfirmation(output,res,parent.getAbsolutePath());
            return res;
        }
        catch (SecurityException e)
        {
            envoiConfirmation(output,false,e.toString());
            return false;
        }
    }