Core Java

How to create a QR Code SVG using Zxing and JFreeSVG in Java?

In this article, we will look at how to use the Zxing QR code generation library and JFreeSVG library to create a QR Code SVG image in Java.

QR Code Generation

The below code creates a java.awt.image.BufferedImage object representing QR Code using Zxing library:

1
public static BufferedImage getQRCode(String targetUrl, int width,     int height) {     try {         Hashtable<EncodeHintType, Object> hintMap = new Hashtable<>();         hintMap.put(EncodeHintType.ERROR_CORRECTION,             ErrorCorrectionLevel.L);         QRCodeWriter qrCodeWriter = new QRCodeWriter();         BitMatrix byteMatrix = qrCodeWriter.encode(targetUrl,             BarcodeFormat.QR_CODE, width, height, hintMap);         int CrunchifyWidth = byteMatrix.getWidth();         BufferedImage image = new BufferedImage(CrunchifyWidth,             CrunchifyWidth, BufferedImage.TYPE_INT_RGB);         image.createGraphics();         Graphics2D graphics = (Graphics2D) image.getGraphics();         graphics.setColor(Color.WHITE);         graphics.fillRect(0, 0, CrunchifyWidth, CrunchifyWidth);         graphics.setColor(Color.BLACK);         for (int i = 0; i < CrunchifyWidth; i++) {             for (int j = 0; j < CrunchifyWidth; j++) {                 if (byteMatrix.get(i, j)) {                     graphics.fillRect(i, j, 1, 1);                 }             }         }         return image;     } catch (WriterException e) {         e.printStackTrace();         throw new RuntimeException("Error getting QR Code");     } }

Conversion to SVG

The below code snippet converts the java.awt.image.BufferedImage object into SVG using JFreeSVG:

1
public static String getQRCodeSvg(String targetUrl, int width,     int height, boolean withViewBox){     SVGGraphics2D g2 = new SVGGraphics2D(width, height);     BufferedImage qrCodeImage = getQRCode(targetUrl, width, height);     g2.drawImage(qrCodeImage, 0,0, width, height, null);     ViewBox viewBox = null;     if ( withViewBox ){         viewBox = new ViewBox(0,0,width,height);     }     return g2.getSVGElement(null, true, viewBox, null, null); }

The complete code can be found here.

Published on Java Code Geeks with permission by Mohamed Sanaulla, partner at our JCG program. See the original article here: How to create a QR Code SVG using Zxing and JFreeSVG in Java?

Opinions expressed by Java Code Geeks contributors are their own.

Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Inline Feedbacks
View all comments
Back to top button