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Mohamed Sanaulla

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:

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:

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?

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