将图片转为Base64字符串

public class ImageToBase64Demo {
    public static void main(String[] args) throws IOException {
        String imgPath = "1.jpg";
        String imageToBase64 = ImageToBase64(imgPath);
    }

    private static String ImageToBase64(String imgPath) {
        byte[] data = null;
        //读取图片字节数组
        try {
            InputStream in = new FileInputStream(imgPath);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        //对字节数组Base64编码
        BASE64Encoder encoder = new BASE64Encoder();
        //返回Base64编码过的字节数组字符串
        return encoder.encode(Objects.requireNonNull(data));
    }
}