如何更改 iText 中 pdfsignature 的矩形样式和默认字段描述？

Question

在执行延迟签名时，我在我的 pdf 中创建了这个空签名

    public byte[] emptySignature(String src, String dest, String fieldname)
        throws IOException, GeneralSecurityException, DocumentException {

    PdfReader reader = new PdfReader(src);
    FileOutputStream os = new FileOutputStream(dest);
    PdfStamper stamper = PdfStamper.createSignature(reader, os, '[=10=]');
    PdfSignatureAppearance appearance = stamper.getSignatureAppearance();

    appearance.setLocation("Office");
    appearance.setReason("For testing");

    Rectangle r = new Rectangle(36, 748, 244, 680);
    r.setBackgroundColor(BaseColor.WHITE);
    r.setBorderColor(BaseColor.RED);
    r.setBorder(1);
    r.setBorder(2);
    r.setBorder(3);
    r.setBorder(4);

    appearance.setVisibleSignature(r, 1, fieldname);

    ExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.ADOBE_PPKLITE, PdfName.ADBE_PKCS7_DETACHED);
    MakeSignature.signExternalContainer(appearance, external, 8192);

    byte[] data = IOUtils.toByteArray(appearance.getRangeStream());

    return data;
}

签名后我的 pdf 有这个带有默认文本的图章，例如 "Digitally signed by...Date:...Reason:...Location"。

如何更改此文本？显然我可以用 setLocation 修改 Location，但是我怎样才能将字段描述和 "Digitally signed" 更改为其他内容？
我可以更改签名矩形的样式吗？在执行 setVisibleSignature 之前尝试将边框和背景颜色设置为矩形不起作用

我用 itext 5.5

Answer 1

How do I change this text? Obviously I can modify Location with setLocation, but how can I change field descriptions and "Digitally signed" to something else?

您可以设计完全属于您自己的签名外观，请参阅 , this answer, 等示例。

Can I change the style of a signature rectangle? Trying to set border and background color to rectangle before doing setVisibleSignature doesn't work

仅使用您使用 appearance.setVisibleSignature 设置的矩形的位置和尺寸。对于自定义外观，请参见上文。

如何更改 iText 中 pdfsignature 的矩形样式和默认字段描述？

How do I change the rectangle style and default field descriptions of a pdfsignature in iText?

java

pdf

itext