It is there any way to add a Blank Page to an existing PdfDocument ? I've created a method like this:
public void addEmptyPage(PdfDocument pdfDocument){
pdfDocument.addNewPage();
pdfDocument.close();
}
However , when I use it with a PdfDocument , it throws :
com.itextpdf.kernel.PdfException: There is no associate PdfWriter for making indirects.
at com.itextpdf.kernel.pdf.PdfObject.makeIndirect(PdfObject.java:228) ~[kernel-7.1.1.jar:?]
at com.itextpdf.kernel.pdf.PdfObject.makeIndirect(PdfObject.java:248) ~[kernel-7.1.1.jar:?]
at com.itextpdf.kernel.pdf.PdfPage.<init>(PdfPage.java:104) ~[kernel-7.1.1.jar:?]
at com.itextpdf.kernel.pdf.PdfDocument.addNewPage(PdfDocument.java:416) ~[kernel-7.1.1.jar:?]
Which is the correct way to insert a Blank page into a pdf document?
com.itextpdf.kernel.PdfException: There is no associate PdfWriter for making indirects.
That exception indicates that you initialize your PdfDocument with only a PdfReader, no PdfWriter. You don't show your PdfDocument instantiation code but I assume you do something like this:
PdfReader reader = new PdfReader(SOURCE);
PdfDocument document = new PdfDocument(reader);
Such documents are for reading only. (Actually you can do some minor manipulations but nothing as big as adding pages.)
If you want to edit a PDF, initialize your PdfDocument with both a PdfReader and a PdfWriter, e.g.
PdfReader reader = new PdfReader(SOURCE);
PdfWriter writer = new PdfWriter(DESTINATION);
PdfDocument document = new PdfDocument(reader, writer);
If you want to store the edited file at the same location as the original file,
you must not use the same file name as SOURCE in the PdfReader and as DESTINATION in the PdfWriter.
Either first write to a temporary file, close all participating objects, and then replace the original file with the temporary file:
PdfReader reader = new PdfReader("document.pdf");
PdfWriter writer = new PdfWriter("document-temp.pdf");
PdfDocument document = new PdfDocument(reader, writer);
...
document.close();
Path filePath = Path.of("document.pdf");
Path tempPath = Path.of("document-temp.pdf");
Files.move(tempPath, filePath, StandardCopyOption.REPLACE_EXISTING);
Or read the original file into a byte[] and initialize the PdfReader from that array:
PdfReader reader = new PdfReader(new ByteArrayInputStream(Files.readAllBytes(Path.of("document.pdf"))));
PdfWriter writer = new PdfWriter("document.pdf");
PdfDocument document = new PdfDocument(reader, writer);
...
document.close();
Related
I am encountering an issue while merging two PDFs generated out of IText.
I am new to iText7
I am creating one pdf from html and creating another pdf with excel(.xls) as embedded document to pdf.
I want to merge the 2 files.
Basically I want to generate a PDF from html then attach a excel document to it and then output combined html outPutStream from these two pdfs.
Below is the code I am using
ByteArrayOutputStream htmlToPdfContent = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(htmlToPdfContent);
PdfDocument pdf = new PdfDocument(writer);
pdf.setTagged();
PageSize pageSize = PageSize.A4.rotate();
pdf.setDefaultPageSize(pageSize);
ConverterProperties properties = new ConverterProperties();
HtmlConverter.convertToPdf(htmlContent, pdf, properties);
FileUtils.cleanDirectory(new File(outputDir));
ByteArrayOutputStream pdfResult = new ByteArrayOutputStream();
PdfWriter writerResult = new PdfWriter(pdfResult);
PdfDocument pdfDocResult = new PdfDocument(writerResult);
PdfReader reader = new PdfReader(new ByteArrayInputStream(htmlToPdfContent.toByteArray()));
PdfDocument pdfDoc = new PdfDocument(reader);
pdfDoc.copyPagesTo(1, pdfDoc.getNumberOfPages(), pdfDocResult);
ByteArrayOutputStream pdfAttach = new ByteArrayOutputStream();
PdfDocument pdfLaunch = new PdfDocument(new PdfWriter(pdfAttach));
Rectangle rect = new Rectangle(36, 700, 100, 100);
byte[] embeddedFileContentBytes = Files.readAllBytes(Paths.get(excelPath));
PdfFileSpec fs = PdfFileSpec.createEmbeddedFileSpec(pdfLaunch, embeddedFileContentBytes, null, "test.xlsx", null, null);
PdfAnnotation attachment = new PdfFileAttachmentAnnotation(rect, fs)
.setContents("Click me");
pdfLaunch.addNewPage().addAnnotation(attachment);
PdfDocument appliedChanges = new PdfDocument(new PdfReader(new ByteArrayInputStream(pdfAttach.toByteArray())));
appliedChanges.copyPagesTo(1, appliedChanges.getNumberOfPages(), pdfDocResult);
try(OutputStream outputStream = new FileOutputStream(dest)) {
pdfResult.writeTo(outputStream);
}
This is throwing exception
13:56:05.724 [main] ERROR com.itextpdf.kernel.pdf.PdfReader - Error occurred while reading cross reference table. Cross reference table will be rebuilt.
com.itextpdf.io.IOException: Error at file pointer 19,272.
at com.itextpdf.io.source.PdfTokenizer.throwError(PdfTokenizer.java:678)
at com.itextpdf.kernel.pdf.PdfReader.readXrefSection(PdfReader.java:801)
at com.itextpdf.kernel.pdf.PdfReader.readXref(PdfReader.java:774)
at com.itextpdf.kernel.pdf.PdfReader.readPdf(PdfReader.java:538)
at com.itextpdf.kernel.pdf.PdfDocument.open(PdfDocument.java:1818)
at com.itextpdf.kernel.pdf.PdfDocument.<init>(PdfDocument.java:238)
at com.itextpdf.kernel.pdf.PdfDocument.<init>(PdfDocument.java:221)
at com.mediaocean.prisma.order.command.infrastructure.pdf.itext.PdfAttachmentLaunch.main(PdfAttachmentLaunch.java:76)
Caused by: com.itextpdf.io.IOException: xref subsection not found.
... 8 common frames omitted
Exception in thread "main" com.itextpdf.kernel.PdfException: Trailer not found.
at com.itextpdf.kernel.pdf.PdfReader.rebuildXref(PdfReader.java:1064)
at com.itextpdf.kernel.pdf.PdfReader.readPdf(PdfReader.java:543)
at com.itextpdf.kernel.pdf.PdfDocument.open(PdfDocument.java:1818)
at com.itextpdf.kernel.pdf.PdfDocument.<init>(PdfDocument.java:238)
at com.itextpdf.kernel.pdf.PdfDocument.<init>(PdfDocument.java:221)
at com.mediaocean.prisma.order.command.infrastructure.pdf.itext.PdfAttachmentLaunch.main(PdfAttachmentLaunch.java:88)
13:56:05.773 [main] ERROR com.itextpdf.kernel.pdf.PdfReader - Error occurred while reading cross reference table. Cross reference table will be rebuilt.
com.itextpdf.io.IOException: PDF startxref not found.
at com.itextpdf.io.source.PdfTokenizer.getStartxref(PdfTokenizer.java:262)
at com.itextpdf.kernel.pdf.PdfReader.readXref(PdfReader.java:753)
at com.itextpdf.kernel.pdf.PdfReader.readPdf(PdfReader.java:538)
at com.itextpdf.kernel.pdf.PdfDocument.open(PdfDocument.java:1818)
at com.itextpdf.kernel.pdf.PdfDocument.<init>(PdfDocument.java:238)
at com.itextpdf.kernel.pdf.PdfDocument.<init>(PdfDocument.java:221)
at com.mediaocean.prisma.order.command.infrastructure.pdf.itext.PdfAttachmentLaunch.main(PdfAttachmentLaunch.java:88)
Please advise. Thanks in advance !!
Concerning revision 2 of your question
You changed your code differently than proposed in my answer to the first revision of your question, you now convert into the formerly unused PdfDocument pdf instead of directly into the ByteArrayOutputStream htmlToPdfContent.
This actually also is a possible fix of the problem identified in that answer. Thus, you don't get an exception here anymore:
PdfReader reader = new PdfReader(new ByteArrayInputStream(htmlToPdfContent.toByteArray()));
PdfDocument pdfDoc = new PdfDocument(reader);
Instead you now get an exception further down the flow, here:
PdfDocument appliedChanges = new PdfDocument(new PdfReader(new ByteArrayInputStream(pdfAttach.toByteArray())));
And the reason is simple, you have not yet closed the PdfDocument pdfLaunch which writes to the ByteArrayOutputStream pdfAttach. But only closing finalizes the PDF in the output stream. Thus, add the close():
ByteArrayOutputStream pdfAttach = new ByteArrayOutputStream();
PdfDocument pdfLaunch = new PdfDocument(new PdfWriter(pdfAttach));
[...]
pdfLaunch.addNewPage().addAnnotation(attachment);
pdfLaunch.close(); //<==== added
PdfDocument appliedChanges = new PdfDocument(new PdfReader(new ByteArrayInputStream(pdfAttach.toByteArray())));
And you actually do the same mistake again, shortly after, you store the contents of the ByteArrayOutputStream pdfResult to outputStream without closing the PdfDocument pdfDocResult which writes to pdfResult. Thus, also add a close call there:
appliedChanges.copyPagesTo(1, appliedChanges.getNumberOfPages(), pdfDocResult);
pdfDocResult.close(); //<==== added
try(OutputStream outputStream = new FileOutputStream(dest)) {
pdfResult.writeTo(outputStream);
}
Concerning revision 1 of your question
You use the ByteArrayOutputStream htmlToPdfContent as target of two distinct PDF generators, the PdfDocument pdf via the PdfWriter writer and the HtmlConverter.convertToPdf call:
ByteArrayOutputStream htmlToPdfContent = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(htmlToPdfContent);
PdfDocument pdf = new PdfDocument(writer);
pdf.setTagged();
PageSize pageSize = PageSize.A4.rotate();
pdf.setDefaultPageSize(pageSize);
ConverterProperties properties = new ConverterProperties();
HtmlConverter.convertToPdf(content, htmlToPdfContent, properties);
This makes the content of htmlToPdfContent a hodgepodge of the outputs of both of them, in particular not a valid PDF.
As you don't add any content to pdf, you can safely remove it and reduce the above excerpt to
ByteArrayOutputStream htmlToPdfContent = new ByteArrayOutputStream();
ConverterProperties properties = new ConverterProperties();
HtmlConverter.convertToPdf(content, htmlToPdfContent, properties);
I'm writing multiple PdfDocument on a single pdf. The PdfDocument are generated populating PdfAcroForm of different templates.
My solution actually works, but I think it is not very efficent.
Is there a more efficent way to have the same result?
ByteArrayOutputStream globalBaos = new ByteArrayOutputStream();
PdfDocument pdfDocGlobal = new PdfDocument(new PdfWriter(globalBaos));
for (Documento document : docs) {
PdfReader reader = new PdfReader(document.getPath());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(baos);
PdfDocument pdfDoc = new PdfDocument(reader, writer);
Document doc = new Document(pdfDoc);
[.... populate pdfDoc ]
doc.close();
pdfDoc.close();
baos.close();
//read again the closed document to copy it in the globalBaos
PdfDocument dr = new PdfDocument(new PdfReader(new ByteArrayInputStream(baos.toByteArray())));
dr.copyPagesTo(1, dr.getNumberOfPages(), pdfDocGlobal);
dr.close();
}
pdfDocGlobal.close();
FileOutputStream output = new FileOutputStream(FILE_OUTPUT);
output.write(globalBaos.toByteArray());
output.close();
globalBaos.close();
I have an existing function to show pdf files that I can't change.
The input of function is an InputStream variable.
In the past they used to pass a pdf file to it and it shows it.
But right now they asked me to show only first 30 pages of the pdf. So I am using iTextpdf and I do something like this:
PdfReader reader = new PdfReader (inputStream);
reader.selectPages("1-30");
Now I should send the result as InputStream variable to show method.
How I should do it?
Thanks
You can store the result using a PdfStamper like this:
PdfReader reader = new PdfReader (inputStream);
reader.selectPages("1-30");
ByteArrayOutputStream os = new ByteArrayOutputStream();
PdfStamper stamper = new PdfStamper(reader, os);
stamper.close();
byte[] changedPdf = os.toByteArray();
If you want the result again to be in the InputStream inputStream variable, simply add a line
inputStream = new ByteArrayInputStream(changedPdf);
Get the reader of existing pdf file by
PdfReader pdfReader = new PdfReader("source pdf file path");
Now update the reader by
reader.selectPages("1-5,15-20");
then get the pdf stamper object to write the changes into a file by
PdfStamper pdfStamper = new PdfStamper(pdfReader,
new FileOutputStream("destination pdf file path"));
close the PdfStamper by
pdfStamper.close();
It will close the PdfReader too.
I trying to create a PDF file with empty pages, but the code throws java.io.IOException: P
PDF header signature not found when I'm trying to read the temp file. Why?
Relevant code:
Document testDoc = new Document();
File testFile = File.createTempFile("pdfTemp", ".tmp");
String test = testFile.getName();
PdfWriter testWriter = PdfWriter.getInstance(document, new FileOutputStream(test));
testDoc.open();
for (int x=1; x<=pdfReader.getNumberOfPages(); x++){
testWriter.setPageEmpty(false);
testDoc.newPage();
}
testDoc.close();
PdfReader testReader = new PdfReader(test);
This may be a coding issue. Your code uses
PdfWriter testWriter = PdfWriter.getInstance(document, new FileOutputStream(test));
but document variable isn't declared anywhere. I suspect you meant to use the following instead:
PdfWriter testWriter = PdfWriter.getInstance(testDoc, new FileOutputStream(test));
I had an binary pdf(Byte []). I would like to convert it to a com.lowagie.text.Document.is there anyway to convert it without losing any information on it.Thanks
this is i tried, and to not sure how to move further.
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, out);
document.open();
PdfReader reader = new PdfReader(byteBuffer);