如何使用 PDFBox 獲取 PDF 中書簽內容的頁碼

Question

我使用的是 Apache PDFBox 2.0.x 版。 我正在嘗試使用書簽搜索 PDF，當我達到目標時，我應該能夠獲得書簽所指的頁碼。 這是我打印所有書簽的代碼。 我可以做一個像searchText.equals(current.getTitle())一樣的搜索

public static void printBookmark(PDOutlineNode bookmark, String indentation) throws IOException {
    PDOutlineItem current = bookmark.getFirstChild();
    COSObject targetPageRef = null;
    while (current != null) {
        System.out.println(indentation + current.getTitle());           
        printBookmark(current, indentation + "    ");
        current = current.getNextSibling();
    }
}

如果標題與我的搜索文本匹配，那么這就是我的目標書簽。 有人試過這個嗎？

Answer 1

我找到了解決方案。

public static void printBookmark(PDOutlineNode bookmark, String indentation) throws IOException
{
    PDOutlineItem current = bookmark.getFirstChild();
    COSObject targetPageRef = null;
    while (current != null)
    {
        System.out.println(indentation + current.getTitle());       
        PDPageFitWidthDestination destination = (PDPageFitWidthDestination) current.getDestination();
        System.out.println("Page Number " + destination.retrievePageNumber());
        printBookmark(current, indentation + "    ");
        current = current.getNextSibling();
    }

}

Answer 2

給定一個 PDDocument 對象和該文檔對象的 PDOutlineItem，另一種查找書簽指向的頁面索引的方法如下：

    public static void printBookmark2(PDDocument document, PDOutlineNode outline) throws IOException {
        PDOutlineItem current = outline.getFirstChild();

        while (current != null)
        {
            //use PDOutlineItem and PDDocument objects to find the page which the bookmark
            //points to
            PDPage currentPage = current.findDestinationPage(document);
            //use the document and the page to find the index of the page
            Integer currentPageIndex = document.getPages().indexOf(currentPage);
            ...
            //Do other operations
        }
    }