Java神操作：图片快速转换PDF秘籍

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;

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

public class ImageToPDFConverter implements ActionListener {

    private JFrame frame;
    private JButton button;

    public ImageToPDFConverter() {
        frame = new JFrame("Image to PDF Converter");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new FlowLayout());

        button = new JButton("Convert to PDF");
        button.addActionListener(this);

        frame.add(button);
        frame.pack();
        frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button) {
            JFileChooser fileChooser = new JFileChooser();
            int returnValue = fileChooser.showSaveDialog(null);
            if (returnValue == JFileChooser.APPROVE_OPTION) {
                File file = fileChooser.getSelectedFile();
                convertToPDF(file);
            }
        }
    }

    private void convertToPDF(File outputFile) {
        try {
            PDDocument document = new PDDocument();
            PDPage page = new PDPage();
            document.addPage(page);

            PDImageXObject image = PDImageXObject.createFromFile("input.jpg", document);
            PDPageContentStream contentStream = new PDPageContentStream(document, page);
            contentStream.drawImage(image, 50, 50, image.getWidth(), image.getHeight());
            contentStream.close();

            document.save(outputFile);
            document.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new ImageToPDFConverter();
            }
        });
    }
}