合并文档时 AcroForm 不可见

问题描述

我正在尝试使用以下代码将文档与 PDFBox 并排合并：

function void generateSideBySidePDF() {
    File pdf1File = new File(FILE1_PATH);
    File pdf2File = new File(FILE2_PATH);
    File outPdfFile = new File(OUTFILE_PATH);
    PDDocument pdf1 = null;
    PDDocument pdf2 = null;
    PDDocument outPdf = null;
    try {
        pdf1 = PDDocument.load(pdf1File);
        pdf2 = PDDocument.load(pdf2File);
        outPdf = new PDDocument();

        // Create output PDF frame
        PDRectangle pdf1Frame = pdf1.getPage(0).getCropBox();
        PDRectangle pdf2Frame = pdf2.getPage(0).getCropBox();
        PDRectangle outPdfFrame = new PDRectangle(pdf1Frame.getWidth()+pdf2Frame.getWidth(),Math.max(pdf1Frame.getHeight(),pdf2Frame.getHeight()));

        // Create output page with calculated frame and add it to the document
        COSDictionary dict = new COSDictionary();
        dict.setItem(COSName.TYPE,COSName.PAGE);
        dict.setItem(COSName.MEDIA_Box,outPdfFrame);
        dict.setItem(COSName.CROP_Box,outPdfFrame);
        dict.setItem(COSName.ART_Box,outPdfFrame);
        PDPage outpdfpage = new PDPage(dict);
        outPdf.addPage(outpdfpage);

        // Source PDF pages has to be imported as form XObjects to be able to insert them at a specific point in the output page
        LayerUtility layerUtility = new LayerUtility(outPdf);
        PDFormXObject formPdf1 = layerUtility.importPageAsForm(pdf1,0);
        PDFormXObject formPdf2 = layerUtility.importPageAsForm(pdf2,0);

        // Add form objects to output page
        AffineTransform afLeft = new AffineTransform();
        layerUtility.appendFormAsLayer(outpdfpage,formPdf1,afLeft,"left");
        AffineTransform afRight = AffineTransform.getTranslateInstance(pdf1Frame.getWidth(),0.0);
        layerUtility.appendFormAsLayer(outpdfpage,formPdf2,afRight,"right");

        outPdf.save(outPdfFile);
    } catch (IOException e) {
        e.printstacktrace();
    } finally {
        try {
            if (pdf1 != null) pdf1.close();
            if (pdf2 != null) pdf2.close();
            if (outPdf != null) outPdf.close();
        } catch (IOException e) {
            e.printstacktrace();
        }
    }
}

但是，原始文档中包含的表单域不会显示在最终的 PDF 中。我还尝试在最终文档上设置 acroform，这样做：

outDoc.getDocumentCatalog().setAcroForm(acroForm); 

但它不起作用。

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

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