java图片添加水印文字

public Map uploadImg(MultipartFile file) throws IOException {
    OutputStream os = null;
    InputStream is = file.getInputStream();
    try {
        String path = "D:/testFile/";
        byte[] bs = new byte[1024];
        // 输出的文件流保存到本地文件
        File tempFile = new File(path);
        if (!tempFile.exists()) {
            tempFile.mkdirs();
        }
        os = new FileOutputStream(tempFile.getPath() + File.separator + file.getOriginalFilename());
        // 读取到的数据长度
        int len;
        // 开始读取
        while ((len = is.read(bs)) > 0) {
            os.write(bs, 0, len);
        }

        String urlPath = path + file.getOriginalFilename();
        logger.info(urlPath);

        Color markContentColor = new Color(234,17,92);
        Font font = new Font("新宋体",Font.BOLD,30);
        String waterMarkContent = "德玛西亚";
        String tarImgPath = "D:/"+file.getOriginalFilename();

        try {
            // 读取原图片信息
            File srcImgFile = new File(urlPath);
            //文件转化为图片
            Image srcImg = ImageIO.read(srcImgFile);
            //获取图片的宽
            int srcImgWidth = srcImg.getWidth(null);
            //获取图片的高
            int srcImgHeight = srcImg.getHeight(null);
            // 加水印
            BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufImg.createGraphics();
            g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
            //根据图片的背景设置水印颜色
            g.setColor(markContentColor);
            //设置字体
            g.setFont(font);

            //设置水印的坐标
            int x1 = srcImgWidth - 2*getWatermarkLength(waterMarkContent, g);
            int x = 380;
            int y = 285;
            int y1 = srcImgHeight - 2*getWatermarkLength(waterMarkContent, g);
            g.drawString(waterMarkContent, x, y);
            g.dispose();
            // 输出图片
            FileOutputStream outImgStream = new FileOutputStream(tarImgPath);
            try {
                ImageIO.write(bufImg, "png",outImgStream);
            } catch (IOException e) {
                e.printStackTrace();
            }
            logger.info("添加水印完成");
            outImgStream.flush();
            outImgStream.close();

        } catch (Exception e) {
        }

　　return null;

    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        // 完毕，关闭所有链接
        try {
            os.close();            is.close();        
　　　　　　} catch (IOException e) {            e.printStackTrace();        }    
}    return null;}

public int getWatermarkLength(String waterMarkContent, Graphics2D g) {
    return g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), 0, waterMarkContent.length());
}