Learn about GroupDocs.Signature for Java API features

GroupDocs.Signature for Java API functionality contains vast selection of means to process in demand documents formats by using electronic signatures. Wide spectrum of e-signatures like 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. Numerous useful features and settings are available.

How to change Image signatures in your Odp document

GroupDocs.Signature for Java includes useful features like updation of Image signatures placed at Odp documents. It makes possible to change signatures features without extra code.

To start with, create Signature object passing as a constructor parameter path to a document which is supposed to be updated.
Then, instantiate an appropriate particular signature object and set up its identifier and properties which need to be changed.
Lastly, call Signature’s Update method passing particular signature object.
Process updating results to your notice.

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 Odp file
String filePath = "input.odp";
// Set up output file
String outputFilePath = "output.odp";

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

// Id of signature which is supposed to be updated
// such Id might be got as a result of search operation
String id = "ff988ab1-7403-4c8d-8db7-f2a56b9f8530";

// provide signature features to update
// set up particular signature id
ImageSignature signatureToUpdate = new ImageSignature(id);

// specify signature width
signatureToUpdate.setWidth(170);
// specify signature height
signatureToUpdate.setHeight(250);
// set left position
signatureToUpdate.setLeft(10);
// set top position
signatureToUpdate.setTop(10);

// update signature
Boolean updateResult = signature.update(outputFilePath, signatureToUpdate);

// process updation result
if (updateResult)
{
        System.out.println("Signature was updated successfully!");
}