Qfyilyi

Now I can use the PDFBox to extract the outlines from PDF, but some PDF can get the outlines, others can't.

Every PDF has outlines and when I open a pdf use pdf read tool, I can click an outline to a certain page.

Here is my code:

public static void main(String args) {

     try {

        PDDocument document = PDDocument.load(new File(filePath));

        PDDocumentOutline outline = document.getDocumentCatalog().getDocumentOutline();

        getOutlines(document, outline, "");

        document.close();

    } catch (InvalidPasswordException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    } catch (IOException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    }

}



public static void getOutlines(PDDocument document, PDOutlineNode bookmark, String indentation) throws IOException{

    PDOutlineItem current = bookmark.getFirstChild();

    while (current != null) {

        PDPage currentPage = current.findDestinationPage(document);

        Integer pageNumber = document.getDocumentCatalog().getPages().indexOf(currentPage) + 1;

        System.out.println(current.getTitle() + "-------->" + pageNumber);

        getOutlines(document, current, indentation);

        current = current.getNextSibling();

    }

}