如何使用Java和itext从Graphics对象创建包含多个页面的PDF

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfWriter;
import java.awt.Graphics;
import java.io.FileOutputStream;

public class PDFCreator {
    public static void createPDFFromGraphics(Graphics graphics, String filePath) {
        Document document = new Document();
        try {
            PdfWriter.getInstance(document, new FileOutputStream(filePath));
            document.open();
            document.addCreator("Your Name");
            document.addTitle("Graphics to PDF");
            document.addAuthor("Your Name");
            document.addSubject("Converting Graphics to PDF");

            // 将Graphics对象绘制到PDF页面上
            // 这里可以使用graphics对象的绘制方法来绘制图形、文本等

            document.close();
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

public class Main {
    public static void main(String[] args) {
        // 创建Graphics对象，例如通过创建BufferedImage对象获取Graphics对象
        Graphics graphics = bufferedImage.getGraphics();

        // 调用createPDFFromGraphics方法，将Graphics对象转换为PDF
        PDFCreator.createPDFFromGraphics(graphics, "output.pdf");
    }
}