Java 8中如何对图像进行Base64编码和解码呢?

Base64编码和解码的实现思路

借助ImageIO对象中的方法即可实现将图片转换为Base64
    和Base64转换图片

public static String imgToBase64String(final RenderedImage img, final String formatName) {
    final ByteArrayOutputStream os = new ByteArrayOutputStream();
    try {
        ImageIO.write(img, formatName, Base64.getEncoder().wrap(os));
        return os.toString(StandardCharsets.ISO_8859_1.name());
    } catch (final IOException ioe) {
        throw new UncheckedIOException(ioe);
    }
}

public static BufferedImage base64StringToImg(final String base64String) {
    try {
        return ImageIO.read(new ByteArrayInputStream(Base64.getDecoder().decode(base64String)));
    } catch (final IOException ioe) {
        throw new UncheckedIOException(ioe);
    }
}