Converting pdfDocument to byte[] stream - PDFBox Java

Question

I am updating the values of an editable PDF using PDFBox. Instead of saving, I want to return stream. I saved it, it works all fine. Now I want to return byte[] instead of saving it.

public static void main(String[] args) throws IOException
{
    String formTemplate = "myFormPdf.pdf";

    try (PDDocument pdfDocument = PDDocument.load(new File(formTemplate)))
    {
        PDAcroForm acroForm = pdfDocument.getDocumentCatalog().getAcroForm();

        if (acroForm != null)
        {

            PDTextField field = (PDTextField) acroForm.getField( "sampleField" );
            field.setValue("Text Entry");
        }

        pdfDocument.save("updatedPdf.pdf"); // instead of this I need STREAM
    }
}

I tried SerializationUtils.serialize but it fails to serialize it.

Failed to serialize object of type: class org.apache.pdfbox.pdfmodel.PDDcoumemt

What is the error you are getting??

Vishwa Ratna
– Vishwa Ratna

2019-04-01 08:46:30 +00:00
Commented Apr 1, 2019 at 8:46 — Vishwa Ratna
– Vishwa Ratna, Commented Apr 1, 2019 at 8:46
@CommonMan updated it

Danyal Sandeelo
– Danyal Sandeelo

2019-04-01 08:50:26 +00:00
Commented Apr 1, 2019 at 8:50 — Danyal Sandeelo
– Danyal Sandeelo, Commented Apr 1, 2019 at 8:50

shazin · Accepted Answer · 2019-04-01 08:49:12Z

3

Use the overloaded save method which accepts an OutputStream and use ByteArrayOutputStream.

public static void main(String[] args) throws IOException
{
    String formTemplate = "myFormPdf.pdf";

    try (PDDocument pdfDocument = PDDocument.load(new File(formTemplate)))
    {
        PDAcroForm acroForm = pdfDocument.getDocumentCatalog().getAcroForm();

        if (acroForm != null)
        {

           PDTextField field = (PDTextField) acroForm.getField( "sampleField" );
           field.setValue("Text Entry");
        }

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        pdfDocument.save(baos);
        byte[] pdfBytes = baos.toByteArray(); // PDF Bytes
    }
}

answered Apr 1, 2019 at 8:49

shazin

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1 Comment

Danyal Sandeelo Over a year ago

nice! didn't check the overloaded methods. Working all fine now. thanks

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