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我正在寻找将外部链接更改为对附件的引用的可能性。我找到了一个将外部链接更改为其他外部链接的示例，但我需要一个指向附件的链接。

这是我发现的片段：

PDDocument doc = null;
    try {
        doc = PDDocument.load(pathToFile);
        List allPages = doc.getDocumentCatalog().getAllPages();
        for (int i = 0; i < allPages.size(); i++) {
            PDPage page = (PDPage) allPages.get(i);
            List annotations = page.getAnnotations();

            for (int j = 0; j < annotations.size(); j++) {
                PDAnnotation annot = (PDAnnotation) annotations.get(j);
                if (annot instanceof PDAnnotationLink) {
                    PDAnnotationLink link = (PDAnnotationLink) annot;
                    PDAction action = link.getAction();
                    if (action instanceof PDActionURI) {
                        PDActionURI uri = (PDActionURI) action;
                        String oldURI = uri.getURI();
                        System.out.println(oldURI);
                        addToAttachment(oldURI, doc);
                        String newURI = "computer1.wmf";

                        System.out.println("Page " + (i + 1)
                                + ": Replacing " + oldURI + " with "
                                + newURI);
                        uri.setURI(newURI);

谢谢和最好的问候

马库斯

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