public static void fileCopy2BufferByte(String oldFileName,String newFileName){        BufferedInputStream bis = null;        BufferedOutputStream bos = null;        try{            bis = new BufferedInputStream(new FileInputStream(oldFileName));            bos = new BufferedOutputStream(new FileOutputStream(newFileName));            byte[] bytes = new byte[1024];            int len = -1;            while ((len = bis.read(bytes))!=-1)bos.write(bytes,0,len);        }catch (Exception e){            e.printStackTrace();        }finally {            try {                if(bis!=null)bis.close();                if(bos!=null)bos.close();            }catch (IOException ee){                ee.printStackTrace();            }        }    }