QrGenerator.java

    private BufferedImage getOverly(String logo) throws IOException {
    	ClassPathResource resource = new ClassPathResource(logo);
		BufferedImage bufferedImage = ImageIO.read(resource.getInputStream());
        
        int width = bufferedImage.getWidth();  
        int height = bufferedImage.getHeight(); 
        
        int newWidth = WIDTH/6;
        int newHeight = HEIGHT/6;
        
        BufferedImage dimg = new BufferedImage(newWidth, newHeight, bufferedImage.getType());  
        Graphics2D g = dimg.createGraphics();  
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);  
        g.drawImage(bufferedImage, 0, 0, newWidth, newHeight, 0, 0, width, height, null);
        g.dispose();  
        return dimg; 
    }