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代码：

    /**
 * Creates a
 * cited document from the given bitstream of the given item. This
 * requires that bitstream is contained in item.
 * <p>
 * The Process for adding a cover page is as follows:
 * <ol>
 *  <li> Load source file into PdfReader and create a
 *     Document to put our cover page into.</li>
 *  <li> Create cover page and add content to it.</li>
 *  <li> Concatenate the coverpage and the source
 *     document.</li>
 * </p>
 *
 * @param bitstream The source bitstream being cited. This must be a PDF.
 * @return The temporary File that is the finished, cited document.
 * @throws java.io.FileNotFoundException
 * @throws SQLException
 * @throws org.dspace.authorize.AuthorizeException
 */
public File makeCitedDocument(Bitstream bitstream)
        throws IOException, SQLException, AuthorizeException, COSVisitorException {
    PDDocument document = new PDDocument();
    PDDocument sourceDocument = new PDDocument();
    try {
        Item item = (Item) bitstream.getParentObject();
        sourceDocument = sourceDocument.load(bitstream.retrieve());
        PDPage coverPage = new PDPage(PDPage.PAGE_SIZE_LETTER);
        generateCoverPage(document, coverPage, item);
        addCoverPageToDocument(document, sourceDocument, coverPage);

        document.save(tempDir.getAbsolutePath() + "/bitstream.cover.pdf");
        return new File(tempDir.getAbsolutePath() + "/bitstream.cover.pdf");
    } finally {
        sourceDocument.close();
        document.close();
    }
}

pdf合并后我想要实现的目标：

  • 如果 sourceDocument 符合 PDF/A，则保持 PDF/A 合规性
  • 如果 sourceDocument 包含书签，则保留书签
  • 保留 sourceDocument 的元数据（例如标题、作者、主题、关键字）

请不要建议 iText，我已经使用 iText 实现了这一点，但由于许可，我们需要使用 pdfbox 代替。另请注意，这些代码不是我写的，这是来自 dspace。你可以在这里找到完整的代码：CitationDocument.java

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0 回答 0