visulaizar PDF in java application - Embedded - Problem in rendering

Question

Hello,

I need to view PDF’s in my JAVA application. After some research, putting aside the paid components it seemed to me that the best answer would be this:

Displaying pdf in Javafx

The colleague suggests the use of the library [PDF.js][2] running inside a WebView. I was able to view simple PDF’s (where there is only text), but I cannot view PDF’s with images. Can’t seem to load the full file contents.

Some images:

Original example - Using mozila demo (link)

Java application - PDF example with images:

Java Application - Simple PDF Example (text-only):

Code used:

import java.io.File;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.util.Base64;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.concurrent.Worker;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import org.apache.commons.io.FileUtils;

public class BrowserShowPdf extends Application {

    @Override
    public void start(Stage primaryStage) {

        WebView webView = new WebView();
        WebEngine engine = webView.getEngine();
        //Change the path according to yours.
        engine.setJavaScriptEnabled(true);

        File file;
        try {
            file = new File(getClass().getResource("viewer.html").toURI());
            System.out.println("Url ->>>>>" + file.toURI().toURL().toString());
            engine.load(file.toURI().toURL().toString());
        } catch (MalformedURLException ex) {
            Logger.getLogger(BrowserShowPdf.class.getName()).log(Level.SEVERE, null, ex);
        } catch (URISyntaxException ex) {
            Logger.getLogger(BrowserShowPdf.class.getName()).log(Level.SEVERE, null, ex);
        }



        StackPane root = new StackPane();
        root.getChildren().add(webView);

        engine.getLoadWorker()
                .stateProperty()
                .addListener((observable, oldValue, newValue) -> {
                    // this pdf file will be opened on application startup
                    if (newValue == Worker.State.SUCCEEDED) {
                        try {
                            // readFileToByteArray() comes from commons-io library
                            byte[] data = FileUtils.readFileToByteArray(new File("D:\\Font Awesome Cheatsheet.pdf"));
                            String base64 = Base64.getEncoder().encodeToString(data);
                            // call JS function from Java code
                            engine.executeScript("openFileFromBase64('" + base64 + "')");
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                });

        Scene scene = new Scene(root, 900, 800);

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }

}

Some help?

Is there any more practical way to view PDF’s within java applications?

Thank you