How to Digitally Sign a Word Document using Java. For further details: https://kb.aspose.com/words/java/how-to-digitally-sign-a-word-document-using-java/

How to Digitally Sign a Word Document using Java.java

import com.aspose.words.*;
public class Main
{
    public static void main(String[] args) throws Exception // Sign a word document in Java
    {
        // Set the licenses
        new License().setLicense("License.lic");

        // Create digital signature options
        SignOptions options = new SignOptions();

        // Set comments
        options.setComments("Signing Authority Comments");

        // Set signature time
        options.setSignTime(new java.util.Date());

        // Create a certificate holder
        CertificateHolder certificate = CertificateHolder.create("certificate.pfx", "mypass");

        // Sign the document
        DigitalSignatureUtil.sign("Document.docx","SignedDocument.docx",certificate,options);

        System.out.println("Done");
    }
}