java获取远程图片4解决公众号授权二维码无权限显示

 

public static byte[] getBytesFromRemote(String url) throws IOException {
        try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
            URL u = new URL(url);
            BufferedImage image = ImageIO.read(u);

            ImageIO.write(image, "jpg", baos);
            baos.flush();

            return baos.toByteArray();
        }
    }

 注:公众号授权二维码提示:未经授权,无法显示图片,可以使用此方式,获取图片后转BASE64