Sign Pdf documents with custom digital signature appearance
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GroupDocs.Signature contains classes that implements for Pdf document special signature appearances.
Base signature options SignOptions has the setAppearance method that accepts the instance of following class
- PdfDigitalSignatureAppearance class implements properties to customize digital signature appearance: labels, background and foreground colors, font family and font size.
Here are the steps to add digital signature to PDF document and customize signature appearance with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path as a constructor parameter.
- Compose object of DigitalSignOptions object with all required properties.
- Call
setAppearanceof DigitalSignOptions with instance of PdfDigitalSignatureAppearance class - Call
signmethod of Signature class instance and pass created DigitalSignOptions to it. - Analyze SignResult result to check newly created signatures if needed.
This example shows how to add electronic Digital signature to Pdf document with customized appearance. Colors are java.awt.Color values.
// initialize Signature instance
Signature signature = new Signature("sample.pdf");
try
{
DigitalSignOptions options = new DigitalSignOptions("certificate.pfx");
// certificate password
options.setPassword("1234567890");
// digital certificate details
options.setReason("Approved");
options.setLocation("New York");
// apply custom PDF signature appearance
PdfDigitalSignatureAppearance appearance = new PdfDigitalSignatureAppearance();
// do not show contact details
appearance.setContactInfoLabel("");
// simplify reason label
appearance.setReasonLabel("?");
// change location label
appearance.setLocationLabel("From");
appearance.setDigitalSignedLabel("By");
appearance.setDateSignedAtLabel("On");
// apply custom appearance color
appearance.setBackground(Color.RED);
options.setAppearance(appearance);
options.setAllPages(true);
options.setWidth(160);
options.setHeight(80);
// setup signature border
Border border = new Border();
border.setVisible(true);
border.setColor(Color.RED);
border.setDashStyle(DashStyle.DashDot);
border.setWeight(2);
options.setBorder(border);
SignResult signResult = signature.sign("signed.pdf", options);
}
finally
{
signature.dispose();
}
You may easily run the code above and see the feature in action in our GitHub examples:
- Sign PDF document with custom digital signature appearance
- GroupDocs.Signature for Java examples, plugins, and showcase
- GroupDocs.Signature for .NET examples, plugins, and showcase
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
Along with the full-featured Java library, we provide simple but powerful free online apps.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
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