PDFBox 2.0.8单据签字时出库

Question

我正在尝试使用此方法签署pdf，但得到的文档没有大小：

public static void sign(PDDocument doc) throws KeyStoreException, NoSuchAlgorithmException, CertificateException,
        IOException, UnrecoverableKeyException {
    System.out.println("Document pages ? " + doc.getNumberOfPages());
    KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
    ks.load(VisibleSignature.class.getResourceAsStream(CERT_FILE), ALIAS_PASS);
    System.out.println("KeyStore is null ? " + (ks == null));
    VisibleSignature vs = new VisibleSignature(ks, ALIAS_PASS.clone());
    InputStream is = Resource.get(IMAGE_FILE);
    int page = 1;
    vs.setVisibleSignDesigner(doc, 0, 0, -50, is, page);
    is.close();
    vs.setVisibleSignatureProperties("Test", "Test", "Test", 0, page, true);
    PDSignature signature = new PDSignature();
    PDAcroForm acroForm = doc.getDocumentCatalog().getAcroForm();
    System.out.println("Acroform is null ? " + (acroForm == null));
    System.out.println("Acroform getNeedAppearances ? " + (acroForm.getNeedAppearances()));
    if (acroForm != null && acroForm.getNeedAppearances())
        if (acroForm.getFields().isEmpty())
            acroForm.getCOSObject().removeItem(COSName.NEED_APPEARANCES);
        else
            System.out.println("/NeedAppearances is set, signature may be ignored by Adobe Reader");
    signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE);
    signature.setSubFilter(PDSignature.SUBFILTER_ADBE_PKCS7_DETACHED);
    if (vs.visibleSignatureProperties != null) {
        vs.visibleSignatureProperties.buildSignature();
        signature.setName(vs.visibleSignatureProperties.getSignerName());
        signature.setLocation(vs.visibleSignatureProperties.getSignerLocation());
        signature.setReason(vs.visibleSignatureProperties.getSignatureReason());
        System.out.println("SignerName " + vs.visibleSignatureProperties.getSignerName());
    }
    signature.setSignDate(Calendar.getInstance());
    vs.signatureOptions = new SignatureOptions();
    vs.signatureOptions.setVisualSignature(vs.visibleSignatureProperties.getVisibleSignature());
    vs.signatureOptions.setPage(vs.visibleSignatureProperties.getPage() - 1);
    doc.addSignature(signature, vs.signatureOptions);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    doc.saveIncremental(baos);
    doc.close();
    IOUtils.closeQuietly(vs.signatureOptions);
    byte[] content = baos.toByteArray();
    System.out.println("Content length: >>>>>>>>>>>>>>>>>>> " + content.length);
}

18:50:25,779信息[默认任务-14]stdout-acroform为空？假

18:50:25,780信息[默认任务-14]stdout-Acroform GetNeedExceptions？假

18:50:25,782信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建PDF结构

18:50:25,782信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建ProcSet数组

18:50:25,782信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建PDF页

18:50:25,783信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建AcroForm

18:50:25,788信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建签名字段

18:50:25,788信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建PDSignature

18:50:25,788信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建AcroForm字典

18:50:25,789信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-矩阵已添加

18:50:25,792信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建签名矩形

18:50:25,793信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-Formatter矩形已创建

18:50:25,815信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.Visible.pdvisiblesigbuilder-已创建可见签名图像

18:50:25,815信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建持有者表单流

18:50:25,816信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建持有者表单资源

18:50:25,816信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建持有者表单

18:50:25,816信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建PDF外观字典

18:50:25,817信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建另一个表单（内部表单-它将在holder表单内部）的流

18:50:25,817信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建另一个表单（内部表单-它将位于holder表单内部）的资源

18:50:25,817 INFO[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-已创建另一个表单（内部表单-它将位于holder表单内部

18:50:25,817信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-现在将内部窗体插入到holder窗体中

18:50:25,817信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-创建的图像表单流

18:50:25,817信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-创建的图像表单资源

18:50:25,818信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-创建的图像表单

18:50:25,818信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-创建的背景层表单

18:50:25,818信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-插入到PDF的进程集

18:50:25,818信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-注入到pdf的外观流

18:50:25,818信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.Visible.pdvisiblesigbuilder-已创建可见签名

18:50:25,819信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdvisiblesigbuilder-WidgetDictionary已创建

18:50:25,825 DEBUG[default task-14]org.apache.pdfbox.cos.cosstream-创建调用的InputStream,之前没有将数据写入流。

18:50:25,825信息[默认任务-14]org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.pdftemplateCreator-流返回已启动，size=21301

18:50:25,825信息[默认任务-14]stdout-signernamehtml" target="_blank">测试

18:50:25,857信息[默认任务-14]stdout-内容长度:>>>>>>>>>>>>>>>>>>>0

有人知道这是怎么回事吗？

Answer 1

在代码中，您没有为文档提供可用于签名的signatureinterface实现。在此用例中，不提供此功能会使PDFBox假定您将在外部创建签名（例如，查看原始的createVisiblesignatury方法sign)。在这种情况下，在使用ExternalSigningSupport方法SetSignate设置签名后，将结果写入输出流。由于不这样做，您的ByteArrayOutputStream baos将保持为空。

但是您确实有一个SignatureInterface实例，您已经用证书和密钥材料初始化了该实例：您的VisibleSignature vs。因此，我认为您没有提供signatureinterface不是故意的。

因此，要提供SignatureInterface，必须使用带有SignatureInterface参数的PDDocument.AddSignature重载。例如。正在替换您的呼叫

doc.addSignature(signature, vs.signatureOptions);

由

doc.addSignature(signature, vs, vs.signatureOptions);

使您的代码能够正常工作。