如何将MultipartFile转换为字节流

Question

//或者将多部分文件保存到DB中的任何其他解决方案.我试过这种方式,但得到错误.

File fileOne = new File("file.getOrignalFileName");//what should be kept inside this method 
byte[] bFile = new byte[(int) fileOne.length()];
try {
    FileInputStream fileInputStream = new FileInputStream(fileOne);
    //convert file into array of bytes
    fileInputStream.read(bFile);
    fileInputStream.close();
} catch (Exception e) {
    e.printStackTrace();
}
questionDao.saveImage(bFile);

Answer 1

MultipartFile  file;
byte [] byteArr=file.getBytes();
InputStream inputStream = new ByteArrayInputStream(byteArr);