将CSV文件作为附件插入pdf文件JAVA中

Question

I need to generate PDF which contains inside a CSV file as an attachment that can be opened (double clicking on it). Is there a way to do this programmaticaly in JAVA? Thanks.

Answer 1

Since you don't show any code, it's hard to know whether you are using the new iText 7 or the old (and no longer supported) iText 5.

It is also unclear whether you want to attach as a document-level attachment (visible only in the attachment panel of the PDF) or a file as an annotation (also visible on a page).

Let's assume that you're new at iText, and that you started with the most recent version. In that case, you can add a document-level attachment like this:

PdfDocument pdfDoc = new PdfDocument(new PdfWriter(DEST));
PdfFileSpec fs = PdfFileSpec.createEmbeddedFileSpec(pdfDoc,
    PATH, null, "test.csv", null, null, false);
pdfDoc.addFileAttachment("specificname", fs);

In this case PATH is a file path to your CSV file.

The iText 7 code to add a file attachment annotation looks like this:

PdfDocument pdfDoc = new PdfDocument(new PdfWriter(DEST));
Rectangle rect = new Rectangle(36, 700, 100, 100);
PdfFileSpec fs = PdfFileSpec.createEmbeddedFileSpec(pdfDoc,
    PATH, null, "test.csv", null, null, false);
PdfAnnotation attachment = new PdfFileAttachmentAnnotation(rect, fs)
            .setContents("Click me");
pdfDoc.addNewPage().addAnnotation(attachment);

The rectangle rect defines the position and dimensions of the annotation. If you want to add a file attachment annotation to an existing document, you can create a PdfDocument that also takes a PdfReader instance as parameter.

If for some reason you still want to use the old iText, then you can add a document-level attachment like this:

PdfFileSpecification fs = PdfFileSpecification.FileEmbedded(
    writer, null, fileName, csv_stream;
fs.AddDescription("specificname", false);
writer.AddFileAttachment(fs);

Or like this:

PdfFileSpecification fs = PdfFileSpecification.FileEmbedded(
    writer, null, fileName, csv_stream);
fs.AddDescription("specificname", false);
stamper.AddFileAttachment(fs);

The former snippet is for when you have a PdfWriter instance because you're creating a document from scratch; the latter snippet is for when you have a PdfStamper instance because you're adding an attachment to an existing document.

For a file attachment annotation, you need this code:

PdfFileSpecification fs = PdfFileSpecification.fileEmbedded(
    writer, null, fileName, csv_stream);
PdfAnnotation attachment =
    PdfAnnotation.createFileAttachment(writer, rect, fileName, fs);
writer.addAnnotation(attachment);

Or, if you don't have a writer , but a stamper :

stamper.addAnnotation(attachment, p);

where p is a page number.

Obviously, it's recommended to use iText 7 as that's more future-proof than iText 5.