itext

问题 The application I'm working on is using older versions of com.lowagie itext 2.x, now i want to move that to upper version to 4.x, but it looks like several packages are being renamed/removed etc.. I would like to ask if anyone did a migration to 4.x ? If so any suggestions would be great. Thanks in advance 回答1: There has never been an iText 4.2.0 . If you find a version that claims to be iText 4.2.0 , then you shouldn't use it because it's in violation with the guidelines of open source. This

问题 I have a simple signature method to sign PDF documents working fine, it signs the documents with the default stamp that shows Name, Location, Date and Reason. Now my manager asked me if it is possible to add one more field on it. Let's suppose it is an "Email" field as I haven't been told exactly what they want. I tried searching and apply somethings I found but nothing has worked. Also, I was asked if it is possible to remove/hide the label of those 4 default fields (Date, Reason, etc...)

问题 I have a simple signature method to sign PDF documents working fine, it signs the documents with the default stamp that shows Name, Location, Date and Reason. Now my manager asked me if it is possible to add one more field on it. Let's suppose it is an "Email" field as I haven't been told exactly what they want. I tried searching and apply somethings I found but nothing has worked. Also, I was asked if it is possible to remove/hide the label of those 4 default fields (Date, Reason, etc...)

问题 I can sign a pdf document without problem. My app logic is; 1- create an empty field for signature in pdf 2- send the hash code of the field to the signature webservice 3- get signature object 4- embedded this object into the field. Here is my code Signature is Invalid for PDF File with iText Thank to @mlk, helped me regarding it. But I i realize that I have problem with Revocation. As can bee seen in the image, my signature does not contain OCSP. and in the trust section, 'Certify documents'

问题 we have created an application to generate pdf documents using itext 5 library. As the part of pdf generation, we tried to embed an image inline in pdf which should be non editable and read only. We tried with an addImage method of PdfContentByte as below, byte[] decoded = Base64.getDecoder().decode(encodedImage); image = Image.getInstance(decoded); After this image is retrieved, used the same in addImage method. PdfContentByte canvas = pdfStamper.getOverContent(item.getPage(0)); canvas

问题 This is the situation. I need to add PDF generation to a program that already has PNG generation. Initially the 2 classes involved are : ActionUsuels From where the constructor of CaptureImage3D is called. When I added the PDF generation I added a method at the CaptureImage3D class. Before adding the PDF generation, the PNG generation worked correctly. But now when I try to do the PNG generation, I get a : NoClassDefFoundError : com/lowagie/text/DocumentException . I know it means that the

问题 I have the below situation and issue I would like to ask your input and help. At the company we have an app that generates PDF and we are using iTextSharp for that purpose. And so far we used only Latin alphabet, but now we have to upgrade the app to use Arabic alphabet too. The generator gets the input in json file and it already contains the proper Arabic texts in the proper format (I mean in right to left format) The ColumnText component (from iTextSharp) gets everything that is needed to

问题 I am looking forward to create a pdf using iText. The pdf will have a header and a footer. Both the header and footer will have a image (company logo) in it. I am looking forward to an example similar to that. I will be using the iText library for the first time so I am not sure where to start off from. 回答1: To add headers and footers to a PDF you generate using iText 7.x, you will generally create event listeners for page starts and/or page ends and add the header and footer contents there

问题 Please let me know,how do we modify below text which appears above digital signature using java itext. Text is shown in black color in image. "Document certified by xyz" How do we change above text , color and font size ? Thanks 回答1: In comments you clarified that you use a deprecated option to make the PDF viewer display the validation result in the signature visualization. (Use of this option is strongly recommended against; in current PDF specifications - ISO 32000-2:2017 - it is forbidden

问题 I want to apply round corner border to a table. This table is dynamic. That means it can grow up to multiple pages or can accommodate in single page. If table comes in single page, then outermost corner of all four corner cells should be drawn as rounded. If table grows up to multiple pages (say 3 pages), then outermost corner of all four corner cells should be drawn as rounded for all 3 pages. Here is the approach which I am using to implement the above scenario. public void createPdf(String