Discover new GroupDocs.Signature for Java API features

GroupDocs.Signature for Java API provides wide range of ways to process numerous documents formats by using electronic signatures. Many types of digital signatures as texts, images, digital certificates, barcodes, QR-codes, stamps or metadata are supported. Customers can add, remove, edit, validate or search digital signatures at PDFs, MS Word documents, MS Excel workbooks, MS PowerPoint presentations, Adobe Photoshop files and various image formats. Astonishing number of additional features and settings are available.

How to validate Digital signatures in your Xls document

GroupDocs.Signature for Java includes useful features like verification of Digital signatures placed at Xls documents. Use this opportunity without implementing extra code.

Firstly, instantiate Signature class providing as a constructor parameter path to a document which is supposed to be verified.
Secondly, create a new VerifyOptions object and set up all required properties.
Finally, invoke Signature’s object Verify method passing VerifyOptions instance.
Then process verification results.

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
Download the latest version of GroupDocs.Signature for Java from Maven

        
// Set up input Xls file
String filePath = "input.xls";

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

//Provide verification options
DigitalVerifyOptions options = new DigitalVerifyOptions();

// Digital signature comment
options.setComments("Approved");

// specify period of signatures
options.setSignDateTimeFrom(new Date(2020, 12, 12));
options.setSignDateTimeTo(new Date(2022, 12, 12));
                    
// Verify document signatures
VerificationResult result = signature.verify(options);

//process result
if (result.isValid())
{
    //..
}