一、BufferedImage转base64 

/*** BufferedImage 编码转换为 base64* @param bufferedImage* @return*/private static String BufferedImageToBase64(BufferedImage bufferedImage) {ByteArrayOutputStream bao = new ByteArrayOutputStream();//io流try {ImageIO.write(bufferedImage, "png", bao);//写入流中} catch (IOException e) {e.printStackTrace();}byte[] bytes = Base64.encodeBase64(bao.toByteArray());String base64 = new String(bytes);base64 = base64.replaceAll("\n", "").replaceAll("\r", "");//删除 \r\nSystem.out.println("值为：" + "data:image/png;base64," + png_base64);return "data:image/png;base64," + png_base64;}

二、base64转BufferedImage

/*** base64 编码转换为 BufferedImage* @param base64* @return*/public static BufferedImage base64ToBufferedImage(String base64) {Decoder decoder = Base64.getDecoder();try {byte[] bytes = decoder.decode(base64);ByteArrayInputStream bai = new ByteArrayInputStream(bytes);return ImageIO.read(bai);} catch (IOException e) {e.printStackTrace();}return null;}