如何使用pdfbox向一组pdf文件添加相对超链接？

PDDocument document = PDDocument.load(new File("input.pdf"));

PDAnnotationLink link = new PDAnnotationLink();
link.setAction(new PDActionURI());
link.setRectangle(new PDRectangle());

PDPage page = document.getPage(pageIndex);
page.getAnnotations().add(link);

document.save(new File("output.pdf"));

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationLink;
import org.apache.pdfbox.pdmodel.interactive.action.PDActionURI;
import org.apache.pdfbox.pdmodel.common.PDRectangle;

import java.io.File;
import java.io.IOException;

public class PDFLinkAdder {
    public static void main(String[] args) {
        try {
            // 加载PDF文件
            PDDocument document = PDDocument.load(new File("input.pdf"));

            // 创建超链接
            PDAnnotationLink link = new PDAnnotationLink();
            link.setAction(new PDActionURI());
            link.setRectangle(new PDRectangle());

            // 添加超链接到页面
            PDPage page = document.getPage(pageIndex);
            page.getAnnotations().add(link);

            // 保存PDF文件
            document.save(new File("output.pdf"));

            // 关闭文档
            document.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}