从JButton获取图像并导出到PDF

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class ImageExportExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Image Export Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton exportButton = new JButton("Export Image");
        exportButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 获取图像
                BufferedImage image = new BufferedImage(exportButton.getWidth(), exportButton.getHeight(), BufferedImage.TYPE_INT_ARGB);
                Graphics2D graphics = image.createGraphics();
                exportButton.paint(graphics);
                graphics.dispose();

                // 导出图像到PDF
                try {
                    File outputFile = new File("image.pdf");
                    // 调用PDF导出方法，将图像导出到PDF文件
                    exportToPDF(image, outputFile);
                    System.out.println("Image exported to PDF successfully.");
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        });

        frame.getContentPane().add(exportButton);
        frame.pack();
        frame.setVisible(true);
    }

    private static void exportToPDF(BufferedImage image, File outputFile) throws IOException {
        // 在这里实现将图像导出到PDF的逻辑
        // 可以使用第三方的PDF库，例如iText或Apache PDFBox
        // 这里省略具体的实现代码
    }
}