流方式获取照片

    public byte[] lookRwqdPicture(Integer id) throws IOException {
        CheckPicture pic = checkPictureServiceImpl.getById(id);
        if (!ObjectUtils.isEmpty(pic.getName())) {
            Path path = Paths.get(pic.getZpfwqlj(), pic.getName());
            File file = new File(String.valueOf(path));
            byte[] bytes = null;
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            try {
                BufferedImage bi;
                bi = ImageIO.read(file);
//                ImageIO.write(bi, "png", baos);
                ImageIO.write(bi, pic.getName().split("\.")[1], baos);
                bytes = baos.toByteArray();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                baos.close();
            }
            return bytes;
        } else {
            return null;
        }
    }