Java给图片添加水印

/**
     * 给图片添加水印、可设置水印图片旋转角度
     * @param iconPath 水印图片路径
     * @param srcImgPath 源图片路径
     * @param targerPath 目标图片路径
     */
    public static void markImageByIcon(String iconPath, String srcImgPath,
                                       String targerPath, Integer width, Integer height) {
        OutputStream os = null;
        Integer x = 0;
        Integer y = 0;
        // 通过图片宽高确定水印位置
        Integer size = 0;
        if (width >= height){
            size = height / 2;
        }else {
            size = width / 2;
        }
        x = (width - size) / 2;
        y = (height - size) / 2;
        try {
            Image srcImg = ImageIO.read(new File(srcImgPath));
            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),
                    srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);
            // 得到画笔对象
            // Graphics g= buffImg.getGraphics();
            Graphics2D g = buffImg.createGraphics();

            // 设置对线段的锯齿状边缘处理
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                    RenderingHints.VALUE_INTERPOLATION_BILINEAR);

            g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg
                    .getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);

//            if (null != degree && 0 != degree) {
//                // 设置水印旋转
//                g.rotate(Math.toRadians(degree),
//                        (double) buffImg.getWidth() / 2, (double) buffImg
//                                .getHeight() / 2);
//            }
            // 水印图象的路径 水印一般为gif或者png的，这样可设置透明度
            ImageIcon imgIcon = new ImageIcon(iconPath);
            // 得到Image对象。
            Image img = imgIcon.getImage();
            float alpha = 1f; // 透明度
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));
            // 表示水印图片的位置
            g.drawImage(img, x, y, size, size, null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
            g.dispose();
            os = new FileOutputStream(targerPath);
            // 生成图片
            ImageIO.write(buffImg, "JPEG", os);
//            System.out.println(srcImgPath);
//            System.out.println(targerPath);
//            System.out.println(width);
//            System.out.println(height);
//            System.out.println(iconPath);
            System.out.println("添加水印完成！");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != os)
                    os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }