Create Links in PDF file

Aspose.PDF for Java allows you to add a link to an external PDF file so that you can link several documents together. By adding a link to an application into a document, it is possible to link to applications from a document. This is useful when you want readers to take a certain action at a specific point in a tutorial, for example, or to create a feature-rich document. To create an application link:

  1. Create a Document object.
  2. Get the Page you want to add link to.
  3. Create a LinkAnnotation object using the Page and Rectangle objects.
  4. Set the link attributes using the LinkAnnotation object.
  5. Also, set the to LaunchAction object’s and call setAction(..) method.
  6. When creating the LaunchAction object, specify the application you want to launch.
  7. Add the link to the Page object’s Annotations collection.
  8. Finally, save the updated PDF using the Document object’s Save method.

The following code snippet shows how to create a link to an application in a PDF file.

package com.aspose.pdf.examples;

import com.aspose.pdf.*;


public class ExampleLinks {

    private static String _dataDir = "/home/aspose/pdf-examples/Samples/";

    private static String GetDataDir() {
        String os = System.getProperty("os.name");
        if (os.startsWith("Windows"))
            _dataDir = "C:\\Samples\\Links-Actions";
        return _dataDir;
    }

    public static void CreateLink() {

        // Open document
        Document document = new Document(GetDataDir() + "CreateApplicationLink.pdf");

        // Create link
        Page page = document.getPages().get_Item(1);
        LinkAnnotation link = new LinkAnnotation(page, new Rectangle(100, 200, 300, 300));
        link.setColor(Color.getGreen());
        link.setAction(new LaunchAction(document, _dataDir + "sample.pdf"));
        page.getAnnotations().add(link);

        // Save updated document
        document.save(_dataDir + "CreateApplicationLink_out.pdf");
    }

Aspose.PDF for Java allows you to add a link to an external PDF file so that you can link several documents together. To create a PDF document link:

  1. First, create a Document object.
  2. Then, get the particular Page you want to add the link to.
  3. Create a LinkAnnotation object using the [Page](https://reference.aspose.com/pdf/java/com.aspose.pdf/Page and Rectangle objects.
  4. Set the link attributes using the LinkAnnotation object.
  5. Call setAction(..) method and pass GoToRemoteAction object.
  6. While creating the GoToRemoteAction object, specify the PDF file that should launch, as well as the page number it should open on.
  7. Add the link to the Page object’s Annotations collection.
  8. Finally, save the updated PDF using the Document object’s Save method.

The following code snippet shows how to create PDF document link in a PDF file.

   public static void CreatePDFDocumentLink() {

       // Open document
       Document document = new Document(_dataDir + "CreateDocumentLink.pdf");

       // Create link
       Page page = document.getPages().get_Item(1);
       LinkAnnotation link = new LinkAnnotation(page, new Rectangle(100, 200, 300, 300));
       link.setColor(Color.getGreen());
       link.setAction(new GoToRemoteAction(_dataDir + "sample.pdf", 1));
       page.getAnnotations().add(link);

       // Save updated document
       document.save(_dataDir + "CreateDocumentLink_out.pdf");
   }
Update Links in PDF