原图片基础上添加图片水印和文字水印 Thumbnails Java版

水印要求：左上角为文字水印，左下角为Logo图片水印，右下角为图片水印（如百度定位静态图）。

一、引入Jar依赖

• Gradle语法：

compile 'net.coobird:thumbnailator:0.4.8'

• Maven语法：

    net.coobird
    thumbnailator
    0.4.8

二、代码实现

public File handWaterMark(MultipartFile file, String uploadPath, Integer type, String address, String dealerName,
                              String latitudeCommaLongitude, String date) throws IOException {

        // 原文件名
        String originalFilename = file.getOriginalFilename();
        // 原文件扩展名
        String originalFilenameExtension = org.springframework.util.StringUtils.getFilenameExtension(originalFilename);
        // 百度定位静态图文件名
        String baiduStaticImgFileName = UUID.randomUUID() + "." + "png";
        // 新文件名
        String newFileName = UUID.randomUUID() + "." + originalFilenameExtension;

        // ===================== 水印处理 =====================

        File srcImgFile = new File(uploadPath, Objects.requireNonNull(originalFilename));
        Thumbnails.Builder builder = Thumbnails.of(srcImgFile);

        // 1 左上角 库存点报备信息文字水印的原数据准备
        BufferedImage image = handleTextWaterMark(address, dealerName, latitudeCommaLongitude, date);

        // 2 左下角 logo图片水印
        handleLogoImageWaterMark(uploadPath, builder);

        // 3 右下角 百度定位静态图水印
        File baiduStaticImage = handleBaiduStaticImageWaterMark(uploadPath, latitudeCommaLongitude, baiduStaticImgFileName, builder);

        // 最终成品图片
        FileOutputStream outputStream = new FileOutputStream(srcImgFile);
        outputStream.write(file.getBytes());
        outputStream.close();

        // 添加库存点报备信息文字水印
        builder.watermark(Positions.TOP_LEFT, image, 0.8f)
                .toFile(uploadPath + file.getOriginalFilename());

        // 重命名
        File newFile = new File(uploadPath, newFileName);
        boolean b = srcImgFile.renameTo(newFile);
        // 删除文件 => 百度定位静态图
        boolean delete = baiduStaticImage.delete();

        return new File(newFileName);
    }

 

 /**
     * @return java.awt.image.BufferedImage
     * @throws
     * @description 操纵文字型水印
     * @params [address, dealerName, latitudeCommaLongitude, date]
     */
    private BufferedImage handleTextWaterMark(String address, String dealerName, String latitudeCommaLongitude, String date) {

        final Font font = getSimsunFont();

        BufferedImage image = new BufferedImage(800, 320, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = image.createGraphics();
        image = g.getDeviceConfiguration().createCompatibleImage(800, 320, Transparency.TRANSLUCENT);

        int y = 0;
        int divider30 = 30;

        g = image.createGraphics();
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setColor(Color.red);
        g.setFont(font);

        if (StringUtils.isNotBlank(address)) {
            g.drawString("库存点地址：" + address, 5, y += divider30);
        }

        if (StringUtils.isNotBlank(dealerName)) {
            g.drawString("经销商名称：" + dealerName, 5, y += divider30);
        }

        if (StringUtils.isNotBlank(latitudeCommaLongitude)) {
            g.drawString("经纬度：" + latitudeCommaLongitude, 5, y += divider30);
        }

        if (StringUtils.isNotBlank(date)) {
            g.drawString("拍照时间：" + date, 5, y += divider30);
        }

        g.dispose();
        return image;
    }

 /**
     * @return java.io.File
     * @throws
     * @description 操纵百度定位静态图水印
     * @params [uploadPath, latitudeCommaLongitude, newFileName, builder]
     */
    private File handleBaiduStaticImageWaterMark(String uploadPath, String latitudeCommaLongitude,
                                                 String newFileName, Thumbnails.Builder builder)
            throws IOException {

        String mapUrl = baiduMapUrl + "?ak=" + baiduMapAppKey + "¢er=" +
                latitudeCommaLongitude + "&width=300&height=200&zoom=18";

        File baiduStaticImage = new File(uploadPath + newFileName);

        FileUtils.copyURLToFile(new URL(mapUrl), baiduStaticImage);

        builder.watermark(Positions.BOTTOM_RIGHT,
                ImageIO.read(baiduStaticImage), 1);
        return baiduStaticImage;
    }

    /**
     * @return void
     * @throws
     * @description 操纵logo型图片水印
     * @params [uploadPath, builder]
     */
    private void handleLogoImageWaterMark(String uploadPath, Thumbnails.Builder builder) throws IOException {

        // 添加水印 参数分别为（水印位置，水印图片的路径，透明度）
        File logo = new File(URLDecoder.decode(uploadPath, "utf-8"), "logo.png");
        builder.scale(1).watermark(Positions.BOTTOM_LEFT, ImageIO.read(logo), 0.5f);
    }