@RequestMapping(value = "/anschauen/{id}/qr", method = RequestMethod.GET)
public void showQRCode(
@PathVariable("id") String id, HttpServletRequest request, HttpServletResponse response)
throws IOException {
StringBuffer urlBuffer = request.getRequestURL();
String url = urlBuffer.substring(0, urlBuffer.length() - "/qr".length());
response.setContentType("image/png");
OutputStream out = response.getOutputStream();
QRCode.from(url).to(ImageType.PNG).writeTo(out);
out.flush();
}
/**
* Generate a QR Code and write it to a local file system as .jpg
*
* @param data
* @return the name of the QR code generated.
*/
public static boolean generateQRImage(String data) {
String timePrint = String.valueOf(System.currentTimeMillis());
ByteArrayOutputStream out = QRCode.from(data).to(ImageType.PNG).stream();
generatedQR = "codes/" + timePrint + ".JPG";
try {
new File("codes").mkdir();
File f = new File(generatedQR);
f.createNewFile();
try (FileOutputStream fout = new FileOutputStream(f)) {
fout.write(out.toByteArray());
fout.flush();
fout.flush();
}
return true;
} catch (FileNotFoundException e) {
errorThrown += e.getMessage();
} catch (IOException e) {
errorThrown += e.getMessage();
}
return false;
}