About GroupDocs.Signature for Java Digital signatures API

GroupDocs.Signature for Java is a popular API to esign documents with the digital electronic signatures, with digital certificates. For the Digital signatures API uses PFX certificate files to esign document with password protected private and public keys. The Digital signatures might be used to certify business documents with eSign PDF particular page, certify entire Microsoft Office documents like Words, Excel, Powerpoint files, and Open Office documents. Customers can easily manipulate the signatures like editing them, removing or adjust. The API provides a way to search and verify signatures. Moreover, a lot of abilities for signatures customization are provided.

Steps to sign Pdf with Digital in Java

GroupDocs.Signature for Java provides ability to sign Pdf documents with Digital signatures quickly and easily.

Create an instance of Signature class providing Pdf file supposed to signing as path or memory stream
Instantiate SignOptions class and set all demanded data.
Invoke the Signature.Sign() method passing output Pdf file or memory stream

System Requirements

GroupDocs.Signature for Java are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

Operating systems: Microsoft Windows, Linux, MacOS
Development environments: NetBeans, Intellij IDEA, Eclipse, etc.
Java runtime: J2SE 6.0 and above
Get the latest GroupDocs.Signature for Java from Maven

        
// Set up input Pdf file
String filePath = "input.pdf";
// Set up output file
String outputFilePath = "output.pdf";
// Provide digital certificate
String certificateFilePath = "certificate.pfx";

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

//Provide sign options
DigitalSignOptions options = new DigitalSignOptions(certificateFilePath);

// set certificate password
options.setPassword("1234567890");

// set signature position
options.setLeft(50);
options.setTop(200);

// sign Pdf document
SignResult result = signature.sign(outputFilePath, options);