MultipartFile bannerPicture    用於接收圖片的引數

bannerPicture.getBytes();

pictureName = Util.uuid() + "." + Constants.PICTURE_FORMAT; //隨機圖片名

Path path = Paths.get(Constants.BANNER_PICTURE_STORE_PATH, pictureName);//儲存圖片地址

/**
 * 將圖片儲在指定路徑
 *
 * @param picture 圖片
 * @param path    儲存路徑
 */
public static void savePicture(byte[] picture, Path path) {
    if (Objects.isNull(picture) || Objects.isNull(path)) {
        log.error("can not save picture for path:{}", path);
        return;
    }


    try (InputStream in = new ByteArrayInputStream(picture)) {
        BufferedImage input = ImageIO.read(in);
        int width = input.getWidth();
        int height = input.getHeight();

        BufferedImage output = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
        int[] px = new int[width * height];
        input.getRGB(0, 0, width, height, px, 0, width);
        output.setRGB(0, 0, width, height, px, 0, width);
　      ImageIO.write(output, Constants.PICTURE_FORMAT, path.toFile());   //PICTURE_FORMAT= "jpg"

    } catch (IOException e) {
        log.error("set user picture failed! path:{}", path, e);
    }
}