Add QR Code to PDF, Excel, PPT, Word Documents, and Images in Java

ChangeQRCodeAppearance.java

// Change Appearance of QR code in Java
// Setting background color, forecolor, transparency, etc.
Background background = new Background();
background.setColor(Color.BLACK);
background.setTransparency(0.5);

options.setBackground(background);
options.setForeColor(Color.WHITE);

GenerateQRCode.java

// Electronically Sign PDF, Excel, PPT, Word Documents and Images with QR Code using GroupDocs.Signature for Java API
Signature signature = new Signature("filePath/document.pdf"); // Provide any DOC, PDF, XLS, PPT, PNG, JPG, WebP file.

// Create QR Code option with predefined text
QrCodeSignOptions options = new QrCodeSignOptions("Signed by GroupDocs");
options.setEncodeType(QrCodeTypes.QR);
options.setAllPages(true);

// Set QR Code position & appearance
options.setLeft(50);
options.setTop(50);
options.setHeight(90);
options.setWidth(90);

// Sign document and save file
signature.sign("filePath/document-with-qr-code.pdf", options);