将BufferedImage转换为InputStream,亲测可用

private static final Logger logger = Logger.getLogger(Demo.class);

/**
 * 将BufferedImage转换为InputStream
 * @param image
 * @return
 */
public InputStream bufferedImageToInputStream(BufferedImage image){
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    try {
        ImageIO.write(image, "png", os);
        InputStream input = new ByteArrayInputStream(os.toByteArray());
        return input;
    } catch (IOException e) {
        logger.error("提示:",e);
    }
    return null;
}