itext 7 (java)将新页面上的图像添加到现有pdf文档的末尾

import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Image;

public class AddImageToExistingPDF {
    public static void main(String[] args) {
        String existingPdfPath = "path/to/existing.pdf";
        String newImagePath = "path/to/newImage.jpg";
        String outputPdfPath = "path/to/output.pdf";

        try {
            // 创建文档对象
            PdfDocument pdfDoc = new PdfDocument(new PdfReader(existingPdfPath), new PdfWriter(outputPdfPath));

            // 打开现有文档
            Document doc = new Document(pdfDoc);

            // 创建新页面
            pdfDoc.addNewPage();

            // 添加图像
            ImageData imageData = ImageDataFactory.create(newImagePath);
            Image image = new Image(imageData);
            doc.add(image);

            // 关闭文档
            doc.close();

            System.out.println("图像已成功添加到PDF文档的末尾！");
        } catch (Exception e) {
            System.out.println("添加图像时出现错误：" + e.getMessage());
        }
    }
}