A library for generating QR Codes from Java App engine application.

This QR Code is generated by an app engine microservice using this library

Google App Engine Java standard environment supports only a subset of Java 7 (full Java 8 support is in beta) classes so we need a workaround to create images without java.awt.Image or java.awt.image.BufferedImage.

This library uses QR-Code-generator and PNGJ to output QR Codes as SVG string and PNG (byte array and Base64 string).

App engine servlet basic example

@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

	QrCode qr = QrCode.encodeText("Hello world!", QrCode.Ecc.LOW);

	response.setContentType("image/png");
	response.setStatus(HttpServletResponse.SC_OK);
	
	OutputStream stream = response.getOutputStream();
	stream.write(qr.toByteArray(10, 0));
	stream.close();
}

Inside this repository there is an App Engine demo application (gae-qr-code-generator-api)