Tìm kiếm chữ ký Digital trong tệp Doc

        
// Set up input Doc file
String filePath = "input.doc";

// Instantiate Signature for input file
Signature signature = new Signature(filePath);

//Create search options
DigitalSearchOptions options = new DigitalSearchOptions();

// specify special search criteria
options.setComments("Approved");
// specify period of signatures
options.setSignDateTimeFrom(new Date(2021, 3, 5));
options.setSignDateTimeTo(new Date(2022, 7, 16));

// search for Digital signatures in Doc document
List<DigitalSignature> signatures = signature.search(DigitalSignature.class, options);

// process signatures which were found 
signatures.forEach(item -> System.out.println(item.toString()));