Question

有没有办法将Stage或其他组件（如BorderPane）与可视组件一起导出到PDF文件中？我想在单击按钮将组件导出为PDF文件时？有什么例子吗？

Answer 1

您可以将节点发送到打印机并使用虚拟打印机将其保存为pdf

public class PrinterNodetExample extends Application {


@Override
public void start(Stage primaryStage) {
    Button btn = new Button();
    StackPane root = new StackPane();
    root.getChildren().add(btn);

    Scene scene = new Scene(root, 300, 250);
    btn.setText("Say 'Hello World'");
    btn.setOnAction(new EventHandler<ActionEvent>() {

        @Override
        public void handle(ActionEvent event) {
            System.out.println("To Printer!");
            PrinterJob job = PrinterJob.createPrinterJob();
            if(job != null){
            job.showPrintDialog(primaryStage); 
            job.printPage(root);
            job.endJob();
    }
        }
    });



    primaryStage.setTitle("Printer");
    primaryStage.setScene(scene);
    primaryStage.show();



}


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

Answer 2

您可以在javafx项目中使用PDFBox libreries。此代码从节点获取快照，制作图像文件，然后创建pdf文件并将图像插入pdf文件中。你需要这个.jar http://www-us.apache.org/dist/pdfbox/2.0.8/pdfbox-app-2.0.8.jar。使用pdfbox，您可以将javafx的字符串传递给pdf中的文本，您可以做很多事情（更改字体，大小......）

import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.SnapshotParameters;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.control.Button;
import javafx.scene.image.WritableImage;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
 import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;


 public class NodeToPdf extends Application {

@Override
public void start(Stage primaryStage) {

    CategoryAxis xAxis = new CategoryAxis();
    xAxis.setLabel("x");
     NumberAxis yAxis = new NumberAxis();
    yAxis.setLabel("y");
    BarChart bar = new BarChart(xAxis, yAxis);
    bar.setMaxSize(300, 300);
    bar.setTitle("Bar node" );
    bar.setTranslateY(-100);

    Button btn = new Button();
    btn.setTranslateY(100);
    btn.setText("To Pdf'");



    btn.setOnAction(new EventHandler<ActionEvent>() {

        @Override
        public void handle(ActionEvent event) {
            WritableImage nodeshot = bar.snapshot(new SnapshotParameters(), null);
            File file = new File("chart.png");

try {
    ImageIO.write(SwingFXUtils.fromFXImage(nodeshot, null), "png", file);
} catch (IOException e) {

}

            PDDocument doc    = new PDDocument();
            PDPage page = new PDPage();
            PDImageXObject pdimage;
            PDPageContentStream content;
            try {
                pdimage = PDImageXObject.createFromFile("chart.png",doc);
                content = new PDPageContentStream(doc, page);
                content.drawImage(pdimage, 100, 100);
                content.close();
                doc.addPage(page);
                doc.save("pdf_file.pdf");
                doc.close();
                file.delete();
            } catch (IOException ex) {
                Logger.getLogger(NodeToPdf.class.getName()).log(Level.SEVERE, null, ex);
            }

        }
    });


    StackPane root = new StackPane();

    root.getChildren().add(btn);
    root.getChildren().add(bar);




    Scene scene = new Scene(root, 600, 600);


    primaryStage.setScene(scene);
    primaryStage.show();
}


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

 }

Answer 3

首先猜测你可以简单地将Scene root保存到图像中，然后将其包含在PDF中。有关详细信息，请参阅Node#snapshot方法。

将舞台导出为PDF

3 个答案: