springboot 給圖片加二維碼

給圖片加二維碼啥的如今都是屢見不鮮的，常常會用到的，是吧

@PostMapping("/watermarkImages")
    public String watermarkImages() throws Exception {
        //獲取原始圖片文件
        String srcImgPath = "F://bg1.png";
        String fileNameType = srcImgPath.substring(srcImgPath.lastIndexOf("."), srcImgPath.length());
        String tarImgPath = CustomConfig.diskLocation + System.currentTimeMillis() + fileNameType; //待存儲的地址
        addWaterMark(srcImgPath, tarImgPath);
        return "success";
    }
 
    /***
     * 在一張背景圖上添加二維碼
     * @param bigImgPath 背景圖的路徑
     * @param outPathWithFileName 輸出路徑
     */
    public void addWaterMark(String bigImgPath, String outPathWithFileName) throws Exception {
        // 讀取原圖片信息
        File srcImgFile = new File(bigImgPath);//獲得文件
        Image srcImg = ImageIO.read(srcImgFile);//文件轉化爲圖片
        int srcImgWidth = srcImg.getWidth(null);//獲取圖片的寬
        int srcImgHeight = srcImg.getHeight(null);//獲取圖片的高
        // 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);
        String content = "時光蹉跎看淡歲月你我";
        //使用工具類生成二維碼
        Image image = QRCodeUtil.createImages(content);
        //將小圖片繪到大圖片上,500,300 .表示你的小圖片在大圖片上的位置。
        g.drawImage(image, 500, 500, null);
        //設置顏色。
        g.setColor(Color.WHITE);
        g.dispose();
        // 輸出圖片
        FileOutputStream outImgStream = new FileOutputStream(outPathWithFileName);
        ImageIO.write(bufImg, "png", outImgStream);
        System.out.println("添加水印完成");
        outImgStream.flush();
        outImgStream.close();
    }
 
 
    /***
     * 生成二維碼
     * @param content 二維碼裏面的內容
     */
    public static BufferedImage createImages(String content) throws Exception {
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 192, 192, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        return image;
    }複製代碼