I am exploring usage of iText maven dependency to generate a pdf from the below code.
try {
Document document = new Document();
OutputStream outputStream =
new FileOutputStream(new File("C:\\ImageTester\\samplePDF.pdf"));
PdfWriter.getInstance(document, outputStream);
//Open the document
document.open();
document.add(new Paragraph("Hello world ");
//Close document and outputStream.
document.close();
outputStream.close();
System.out.println("Pdf created successfully.");
} catch (Exception e) {
e.printStackTrace();
}
Maven:
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.10</version>
</dependency>
This above works fine and generate the PDF. However, I have a use-case where I am sent Base64 encoded String that needs to be saved as PDF. How do I this? Converting the Base64 to a byte array and writing that to the outputStream generates the a corrupted PDF.
byte[] bytes = Base64.getDecoder().decode(b64String);
outputStream.write(bytes);
PdfWriter.getInstance(document, outputStream);
Related
I am using itextpdf-5.5.4 jar to merge or add two pdf into one PDF.
I did not get any error or exception while running code but displayed below text in Merged PDF. I did not get below text when i open individual PDF's.
The document you are trying to load requires Adobe Reader 8 or higher.
You may not have the Adobe Reader installed or your viewing
environment may not be properly configured to use Adobe Reader.
For information on how to install Adobe Reader and configure your
viewing environment please see
http://www.adobe.com/go/pdf_forms_configure.
void mergePdfFiles(List<InputStream> inputPdfList, OutputStream outputStream) throws Exception {
// Create document and pdfReader objects.
Document document = new Document();
List<PdfReader> readers = new ArrayList<PdfReader>();
int totalPages = 0;
// Create pdf Iterator object using inputPdfList.
Iterator<InputStream> pdfIterator = inputPdfList.iterator();
// Create reader list for the input pdf files.
while (pdfIterator.hasNext()) {
InputStream pdf = pdfIterator.next();
PdfReader pdfReader = new PdfReader(pdf);
readers.add(pdfReader);
totalPages = totalPages + pdfReader.getNumberOfPages();
}
// Create writer for the outputStream
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
// Open document.
document.open();
// Contain the pdf data.
PdfContentByte pageContentByte = writer.getDirectContent();
PdfImportedPage pdfImportedPage;
int currentPdfReaderPage = 1;
Iterator<PdfReader> iteratorPDFReader = readers.iterator();
// Iterate and process the reader list.
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader = iteratorPDFReader.next();
// Create page and add content.
while (currentPdfReaderPage <= pdfReader.getNumberOfPages()) {
document.newPage();
pdfImportedPage = writer.getImportedPage(pdfReader, currentPdfReaderPage);
pageContentByte.addTemplate(pdfImportedPage, 0, 0);
currentPdfReaderPage++;
}
currentPdfReaderPage = 1;
}
// Close document and outputStream.
outputStream.flush();
document.close();
outputStream.close();
System.out.println("Pdf files merged successfully.");
}
public static void main(String args[]) {
try {
List<InputStream> inputPdfList = new ArrayList<InputStream>();
inputPdfList.add(new FileInputStream("pdf1.pdf"));
inputPdfList.add(new FileInputStream("pdf2.pdf"));
OutputStream outputStream = new FileOutputStream("Merge-PDF.pdf");
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
mergePdfFiles(inputPdfList, byteStream);
byte[] byteS = byteStream.toByteArray();
outputStream.write(byteS);
} catch (Exception e) {
e.printStackTrace();
}
}
Please help me out on this.
I have this method in which I add a password to the pdf, but I am doing it with pdf from the computer. What I want to try is to receive as input parameter a string that would be pdf in base 64 and respond to a base64.
public static void main(String[] args) {
try {
OutputStream file = new FileOutputStream(new File("D:\\Test.pdf"));
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, file);
writer.setEncryption(USER_PASS.getBytes(), OWNER_PASS.getBytes(),
PdfWriter.ALLOW_PRINTING, PdfWriter.ENCRYPTION_AES_128);
document.open();
document.add(new Paragraph("Hello World, iText"));
document.add(new Paragraph(new Date().toString()));
document.close();
file.close();
} catch (Exception e) {
e.printStackTrace();
}
}
It was complicated how to handle a Base64 pdf because it was the first time, but in the end I was able to develop the method where you can add the password to a pdf that is already in base64.
public String EncriptarPDFconContraseña(String pdfBase64, String passwordUser, String passwordOwner) throws IOException, DocumentException {
PdfReader reader = new PdfReader(Base64.decode(pdfBase64));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfStamper stamper = new PdfStamper(reader, baos);
stamper.setEncryption(passwordUser.getBytes(), passwordOwner.getBytes(), PdfWriter.ALLOW_PRINTING, PdfWriter.ENCRYPTION_AES_128);
stamper.close();
String base64 = Base64.encodeBytes(baos.toByteArray());
return base64;
}
I am building a Java web service application in which I would like to convert the HTML file to PDF and send an email to a particular email address.
Conversion from XHTML to PDF.
try {
File outputFile = new File("D:\\Files\\Output_Files\\" + System.currentTimeMillis() + ".pdf");
OutputStream file = new FileOutputStream(outputFile);
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, file);
document.open();
InputStream is = new ByteArrayInputStream(htmlString.getBytes());
XMLWorkerHelper.getInstance().parseXHtml(writer, document,is);
document.close();
file.close();
} catch (IOException e) {
e.printStackTrace();
}
I have verified htmlString and it holds an exact HTML string.
Please review my HTML content here
The issue is that I am receiving the PDF but it does not have any content but an empty page.
If we have string with a content of a html page, how can we convert it to a InputStream made after transform this string to a pdf document?
I'm trying to use iText with XMLWorkerHelper, and this following code works, but the problem is I don't want the output on a file. I have tried several variations in order to get the result on a InputStream that I could convert to a Primefaces StreamedContent but no success. How we can do it?
Is there another technique that we can use to solve this problem?
The motivation to this is use xhtml files wich is already rendered and output it as a pdf to be downloaded by the user.
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document,
new FileOutputStream("results/loremipsum.pdf"));
document.open();
XMLWorkerHelper.getInstance().parseXHtml(writer, document,
new FileInputStream("/html/loremipsum.html"));
document.close();
If you need an InputStream from which some other code can read the PDF your code produces, you can simply create the PDF using a byte array output stream and thereafter wrap the byte array from that stream in a byte array input stream:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, baos);
document.open();
XMLWorkerHelper.getInstance().parseXHtml(writer, document, new FileInputStream("/html/loremipsum.html"));
document.close();
ByteArrayInputStream pdfInputStream = new ByteArrayInputStream(baos.toByteArray());
You can optimize this a bit by creating and processing the PDF in different threads and using a PipedOutputStream and a PipedInputStream instead.
I am using this code to generate PDF using iText. First it creates HTML to PDF after that it converts that PDF in byte array or in BLOB or in byte array.
I dont want to create any physical stores of pdf on my server. First i want to convert HTML to blob of PDF using itext, And after that i want to store that blob in my DB(Stores in DB i will done).
String userAccessToken=requests.getSession()
.getAttribute("access_token").toString();
Document document = new Document(PageSize.LETTER);
String name="/pdf/invoice.pdf";
PdfWriter pdfWriter = PdfWriter.getInstance
(document, new FileOutputStream(requests.getSession().getServletContext().getRealPath("")+"/assets"+name));
document.open();
document.addAuthor("Real Gagnon");
document.addCreator("Real's HowTo");
document.addSubject("Thanks for your support");
document.addTitle("Please read this ");
XMLWorkerHelper worker = XMLWorkerHelper.getInstance();
//data is an html string
String str = data;
worker.parseXHtml(pdfWriter, document, new StringReader(str));
document.close();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
PdfWriter.getInstance(document, byteArrayOutputStream);
byte[] pdfBytes = byteArrayOutputStream.toByteArray();
link=name;
System.out.println("Byte array is "+pdfBytes);
PROBLEM:- Convert html to pdf BLOB using itext, Without physical existence of PDF.
The other answer to this question is almost correct, but not quite.
You can use any OutputStream when you create a PdfWriter. If you want to create a file entirely in memory, you can use a ByteArrayOutputStream like this:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Document document = new Document();
PdfWriter.getInstance(document, baos);
document.open();
// add stuff
document.close();
byte[] pdf = baos.toByteArray();
In short: you first create a ByteArrayOutputStream, you pass this OutputStream to the PdfWriter and after the document is closed, you can get the bytes from the OutputStream.
(In the other answer, there was no way to retrieve the bytes. Also: it is important that you don't try to retrieve the bytes before the document is closed.)
Write into a ByteArrayOutputStream (instead of a FileOutputStream):
PdfWriter pdfWriter = PdfWriter.getInstance
(document, new ByteArrayOutputStream());