使用 PDFBox 填写 PDF 表单

发布于 2024-11-27 04:43:02 字数 1013 浏览 5 评论 0原文

我有一个pdf文件，里面有一个表格。我正在尝试编写一个类，该类将从数据库中获取数据并自动填充表单中的字段。

我已经尝试过 ITextSharp，他们的定价超出了我的预算，尽管它与我的 pdf 完美配合。我需要一个免费的 pdf 解析器，它可以让我导入 pdf、设置数据并保存 PDF，最好保存到流中，这样我就可以从类中返回 Stream 对象，而不是将 pdf 保存到服务器。

我发现这个pdf阅读器但它不起作用。空引用错误很多，当我尝试“修复”它们时，它仍然找不到我的字段。

因此，我已经转向 PdfBox，因为文档说它可以操作 PDF，但是，我找不到任何示例。这是我到目前为止的代码。

var document = PDDocument.load(inputPdf);

var catalog = document.getDocumentCatalog();

var form = catalog.getAcroForm();

form.getField("MY_FIELD").setValue("Test Value");

document.save("some location on my hard drive");
document.close();

问题是 catalog.getAcroForm() 返回 null，因此我无法访问这些字段。有谁知道如何使用 PdfBox 更改字段值并将其保存回来？

编辑：

我确实找到了这个例子，这几乎就是我正在做的事情。只是我的 acroform 在 pdfbox 中为空。我知道那里有一个，因为 itextsharp 可以很好地把它拉出来。

原文

I have a pdf with a form in it. I am trying to write a class that will take data from my database and automatically populate the fields in the form.

I have already tried ITextSharp and their pricing is out of my budget, even though it works perfectly fine with my pdf. I need a free pdf parser that will let me import the pdf, set the data, and save the PDF out, preferably to a stream so that I can return a Stream object from my class rather than saving the pdf to the server.

I found this pdf reader and it doesn't work. Null reference errors are abundant and when I tried to "fix" them, it still couldn't find my fields.

So, I have moved on to PdfBox, as the documentation says it can manipulate a PDF, however, I cannot find any examples. Here is the code I have so far.

var document = PDDocument.load(inputPdf);

var catalog = document.getDocumentCatalog();

var form = catalog.getAcroForm();

form.getField("MY_FIELD").setValue("Test Value");

document.save("some location on my hard drive");
document.close();

The problem is that catalog.getAcroForm() is returning a null, so I can't access the fields. Does anyone know how I can use PdfBox to alter the field values and save the thing back out?

EDIT:

I did find this example, which is pretty much what I am doing. It's just that my acroform is null in pdfbox. I know there is one there because itextsharp can pull it out just fine.

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