二维码生成并保存到指定路径

//定义要生成的二维码字符串
String promotionCode = UUID.randomUUID().toString();
String path = ClassUtils.getDefaultClassLoader().getResource("").getPath();
                        
                        Map<EncodeHintType, Object> hints = new HashMap<>();
                        hints.put(EncodeHintType.MARGIN, 0);
                        BitMatrix bitMatrix = new QRCodeWriter().encode(promotionCode, BarcodeFormat.QR_CODE, 256, 256,hints);
                        int width = bitMatrix.getWidth();
                        int height = bitMatrix.getHeight();
                        BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_ARGB);
                        for (int x = 0; x < width; x++) {
                            for (int y = 0; y < height; y++) {
                                image.setRGB(x, y, bitMatrix.get(x, y) == true ? Color.BLACK.getRGB(): Color.WHITE.getRGB());
                            }
                        }
                        File file = new File(path+"/static/code/codeimg/"+promotionCode+".png");
                        if  (!file .exists()) {
                            file .mkdirs();
                        }
                        ImageIO.write(image,"png", new File(String.valueOf(file)));

<!--生成二维码相关依赖-->
        
            com.google.zxing</groupId>
            core</artifactId>
            3.3.0</version>
        </dependency>
        
            com.google.zxing</groupId>
            javase</artifactId>
            3.3.0</version>
        </dependency>