Replace text inside a PDF file using iText

Question

Im using iText(5.5.13) library to read a .PDF and replace a pattern inside the file. The problem is that the pattern is not being found because somehow some wei

Answer 1

I found this blog Replacing PDF objects(legacy), as everyone said it hard to change binary file. Try if this works.

    PdfReader reader = new PdfReader(src);
    PdfDictionary dict = reader.getPageN(1);
    PdfObject object = dict.getDirectObject(PdfName.CONTENTS);
    if (object instanceof PRStream) {
        PRStream stream = (PRStream)object;
        byte[] data = PdfReader.getStreamBytes(stream);
        stream.setData(new String(data).replace("test", "tested").getBytes());
    }
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
    stamper.close();
    reader.close();

For iText version 7 check Replacing PDF objects