signWithQRCode.java

// For complete examples and data files, please go to https://github.com/groupdocs-signature/GroupDocs.Signature-for-Java
// setup Signature configuration
SignatureConfig signConfig = CommonUtilities.getConfiguration();
// instantiating the conversion handler
SignatureHandler<String> handler = new SignatureHandler<String>(signConfig);

PdfQRCodeSignOptions signOptions = new PdfQRCodeSignOptions("JohnSmith");
// setup QRCode encoding type
signOptions.setEncodeType(QrCodeTypes.QR);

// set signature position
signOptions.setLeft(100);
signOptions.setTop(100);
 
SaveOptions saveOptions = new SaveOptions();
saveOptions.setOutputType(OutputType.String);
saveOptions.setOutputFileName("SignWithQRCode");		   
// sign document
String signedPath = handler.<String>sign("sample.pdf", signOptions, saveOptions);