itext

问题 Hi We have a requirement to convert an existing A4 size pdf to A3 Size PDF in java. Since i am new to itext api conversion pdfs, Can anyone guide me how to do in java using itext or any other api to do. If sample reference provided then appreciable. UPDATe: Output PDF should be in A3 booklet format. 回答1: Please take a look at the MakeA3Booklet example. In this example, we take an existing PDF document with 299 A4 pages (primes.pdf) and we convert it to a 150-page A3 booklet (a3_booklet.pdf):

问题 I am using iText 5.4.1 API to convert HTML to PDF, for English HTML the GIF, JPG images are coming good and same size in PDF as with HTML, but when I use Brazil country HTML the GIF, JPG images are very small. Please find the code snippet below. com.itextpdf.text.Document document = new com.itextpdf.text.Document(); PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(pdfFileNameWithPath)); document.open(); HtmlPipelineContext htmlContext = new HtmlPipelineContext(null);

问题 I am trying to fit a 417 barcode generated by itext into the pdf page. I just spills out of the page. Also the barcode looks different compared to the barcode in adobe acrobat. I have tried and played around with different settings , nothing has worked so far. The original adobe pdf has y/x ratio of 2, and x = 0.0133 inches and error correction 5. I have tried the same settings in itext. Should I create a box first and do something to fit the image in a box. ? 来源： https://stackoverflow.com

问题 I want to check specific parts of a pdf file for visible content. With the PdfCanvasProcessor and a custom eventlistener it is possible to check for text and images but for other kind of content this does not work. So what would be the best approach to check fot any visible content? Regards, Marco 来源： https://stackoverflow.com/questions/46104097/itext7-check-for-visible-content-in-a-specific-area

问题 I've been working with iText to do digital signatures on PDF files for the past weeks and based on what i've understood that there is two ways to add the information to the PDF to make it LTV enabled: Adding the information with the code provided in the iText example, this method requires the signature to be already present because the DSS & VRI dictionaries it creates references the signature. Embedding the crl bytes & ocsp response in the signature at signing time. Eventhough the first

问题 How can I read a local PDF file and offer it as a download in the browser with iText? This is what I tried, but the file always says: Adobe Reader could not open "xxx.pdf" because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachement and wasn't correclty decoded). PdfReader reader = new PdfReader(filename); byte[] streamBytes = reader.getPageContent(1); response.setContentType("application/force-download"); response

问题 I want to fill rectangle with color. I used these code but not working. PdfContentByte canvas = writer.getDirectContent(); canvas.rectangle(50, 600, 500, 40); canvas.setColorFill(BaseColor.GRAY); //canvas.setRGBColorFill(20, 50, 30); //canvas.setCMYKColorFill(0, 0, 0, 75); canvas.setColorStroke(BaseColor.LIGHT_GRAY); canvas.stroke(); Anyone has idea how to fill it ? 回答1: You have to call canvas.fill() after setColorFill() PdfContentByte canvas = writer.getDirectContent(); canvas.rectangle(50,

问题 I want to fill rectangle with color. I used these code but not working. PdfContentByte canvas = writer.getDirectContent(); canvas.rectangle(50, 600, 500, 40); canvas.setColorFill(BaseColor.GRAY); //canvas.setRGBColorFill(20, 50, 30); //canvas.setCMYKColorFill(0, 0, 0, 75); canvas.setColorStroke(BaseColor.LIGHT_GRAY); canvas.stroke(); Anyone has idea how to fill it ? 回答1: You have to call canvas.fill() after setColorFill() PdfContentByte canvas = writer.getDirectContent(); canvas.rectangle(50,

问题 I am on the mainframe platform and uploaded the arial.ttf from Windows. I used the following code for the font, but the font does not show SUBSETTED or EMBEDDED in Adobe. I even tried to add font.getBaseFont to force it to embed. Any reason why it would not embed or subset? String font1 = "arial.ttf"; FontFactory.register(font1,"myfont"); BaseFont bf = BaseFont.createFont(font1, BaseFont.IDENTITY_H, true); Font font = FontFactory.getFont("arial"); font.getBaseFont().setSubset(true); Adobe doc

问题 Why does the following code affect a page's ability to find its top, bottom, right and left? Before applying it, reader.GetCropBox(i).GetLeft(0) and reader.GetPageSize(i).GetLeft(0) return the far left point of every page in an assorted set. After applying it, GetLeft(0) is the far left on some pages and on others the left most point AFTER the margin ends. I'm trying to create a header on any given set of preexisting pages (ie, create white space and then put text in it) using (Stream stream