二维码导出

蔚落 2024-03-22 11:15 11阅读 0赞

/**
         * 获取机械二维码_设备档案库
         * @param machineNum 机械代码 authorizerName授权人名称
         * @return Result
         */
        @ApiOperation(value = "获取机械二维码_设备档案库", notes = "获取机械二维码_设备档案库")
        @GetMapping("/qrcode/{machine-num}/{authorizer-name}")
        @SysLog("获取机械二维码_设备档案库" )
    //    @PreAuthorize("@pms.hasPermission('machine_machineequipmentfile_updateHold')" )
        @Idempotent(expireTime = 3, info = "请勿重复提交")
        public void barQrCode(@PathVariable("machine-num") String machineNum, @PathVariable("authorizer-name") String authorizerName, HttpServletResponse response) {
            // 禁止图像缓存
            response.setHeader(HttpHeaders.PRAGMA, "No-cache");
            response.setHeader(HttpHeaders.CACHE_CONTROL, "no-cache");
            response.setDateHeader(HttpHeaders.EXPIRES, 0);
            response.setContentType("image/png");
            BufferedImage image = BarCodeUtil.createBarCodeMechanical(machineNum,authorizerName);
            try(ServletOutputStream sos = response.getOutputStream()){
                // 将图像输出到Servlet输出流中。
                ImageIO.write(image, "png", sos);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

/**
       * 生成机械二维码图片.
       *
       * @param machineNum 二维码内容
       * @return 二维码图片对象
       */
      public static BufferedImage createBarCodeMechanical(String machineNum , String authorizerName) {
        if (StringUtils.isEmpty(machineNum)) {
          return null;
        }
        Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, IMAGE_CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BufferedImage image = null;
        try {
          BitMatrix bitMatrix = new MultiFormatWriter().encode(machineNum, BarcodeFormat.QR_CODE, IMAGE_WIDTH, IMAGE_HEIGHT, hints);
          image = MatrixToImageWriter.toBufferedImage(bitMatrix, IMAGE_CONFIG);
          // LOGO图片
          BufferedImage logo = getLogoImage();
          if (logo != null) {
            int logoWidth = logo.getWidth();
            int logoHeight = logo.getHeight();
            int x = (IMAGE_WIDTH - logoWidth) / 2;
            int y = (IMAGE_HEIGHT - logoHeight) / 2;
            BufferedImage combined = new BufferedImage(IMAGE_WIDTH_MECHANICAL, IMAGE_HEIGHT_MECHANICAL, BufferedImage.TYPE_INT_BGR);
            Graphics2D g = (Graphics2D) combined.getGraphics();
            g.drawImage(image, 0, 0, null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f));
            g.drawImage(logo, x, y, logoWidth, logoHeight, null);
            image = combined;
          }
          //添加底部文字
          addFontImage(image,machineNum+authorizerName);
        } catch (WriterException we) {
          we.printStackTrace();
        }
        return image;
      }