建议将其转换为字节数组
ByteArrayOutputStream baos = new ByteArrayOutputStream();ImageIO.write(img, "jpg", baos);byte[] bytes = baos.toByteArray();

建议将其转换为字节数组
ByteArrayOutputStream baos = new ByteArrayOutputStream();ImageIO.write(img, "jpg", baos);byte[] bytes = baos.toByteArray();