/**     * 图片转流     *     * @param imgpath     * @return     * @throws Exception     */    public String byte2Base64String(String imgpath) throws Exception {        byte[] buffer = null;        if (null != imgpath && !"".equals(imgpath.toString().trim())) {            File file = new File(imgpath);            FileInputStream fis = new FileInputStream(file);            ByteArrayOutputStream bos = new ByteArrayOutputStream();            byte[] b = new byte[1024];            int n;            while ((n = fis.read(b)) != -1) {                bos.write(b, 0, n);            }            fis.close();            bos.close();            buffer = bos.toByteArray();            Blob serialBlob = new SerialBlob(buffer);            InputStream binaryStream = serialBlob.getBinaryStream();            byte[] input2byte = FileUtil.input2byte(binaryStream);            String imageString = ImageUtil.imageByte2String(input2byte);            return imageString;        } else {            return null;        }    }