pdfbox

问题 I'm not a big fan of asking this kind of questions but well, it's been 3 whole days now trying to solve this bug on my code. I know it's a logic problem and I know how to solve it in my mind, but when it comes to translate my ideas into code I just can't make it work as I want. I'm working on a contract endorsement (a modification of a contract) which compares the data from 2 tables and if any of them has changed then it paints only that information. Sometimes the information that changes

问题 Sorry i am new to PDF box and was looking for a solution on how to get a specific pdf page using the bookmark name? Like the below code snippet am trying to loop all the pages but stuck to link the book mark with the page i need. Can any one please help? import java.awt.print.PrinterException; import java.io.File; import java.io.IOException; import org.apache.pdfbox.cos.COSObject; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox

问题 I am trying to verify digitally signed PDF document in Java. I'm using Apache PDFBox 2.0.6 to get the signature and the original PDF that was signed, then I'm using Bouncy Castle to verify detached signature(calculate the hash of the original file, verify the signature using signer's public key and compare the results). I read this article and tried to get the signature bytes and the original PDF bytes using this code: PDDocument doc = PDDocument.load(signedPDF); byte[] origPDF = doc

问题 I am trying to write content into a PDF file. I have written the code public ByteArrayOutputStream createPDF(String text) throws IOException, COSVisitorException { PDDocument document; PDPage page; PDFont font1; PDPageContentStream contentStream; ByteArrayOutputStream output = new ByteArrayOutputStream(); document = new PDDocument(); try { page = new PDPage(); document.addPage(page); contentStream = new PDPageContentStream(document, page); contentStream.beginText(); contentStream

问题 I am using this code: https://www.tutorialspoint.com/pdfbox/pdfbox_inserting_image.htm To help me add an image to an existing PDF. The problem is that the file it creates is a blank page with only the image on it. Here is my code: public void signPDF(PdfDTO pdfDTO) throws IOException{ //Loading an existing document File file = new File(getAbsolutePdfPath(pdfDTO)); PDDocument doc = PDDocument.load(file); //Retrieving the page PDPage page = doc.getPage(0); //a test to ensure the doc is loading

问题 I am new to PDFBOX. I am reading a PDF file which is in Hindi. I am having trouble reading some unicode characters out of a PDF using PDFBox. I want to copy the string into java objects so that I can work on that. There are couple of things I tried for reading the files. 1. I tried to use PDFTextStripper to read text from document but it prints garbage value and warning about missing unicode mappings. PDDocument document = PDDocument.load(pathToFile); PDFTextStripper s = new PDFTextStripper()

问题 when I try to use one of the PDFBox examples for extracting images, in the run time,it gives me the following exception: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory at org.apache.pdfbox.pdfparser.BaseParser.<clinit>(BaseParser.java:68) at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1218) at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1186) at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1111) at

问题 There is a method in PDFBox's font class, PDFont, named getFontHeight which sounds simple enough. However I don't quite understand the documentation and what the parameters stand for. getFontHeight This will get the font width for a character. Parameters: c - The character code to get the width for. offset - The offset into the array. length The length of the data. Returns: The width is in 1000 unit of text space, ie 333 or 777 Is this method the right one to use to get the height of a

问题 Currently Iam creating a digital and electronic signature using apache pdfbox. Recently i came to know the vulnerabilities in digital and electronic signature like Universal Signature Forgery (USF), Incremental Saving Attack (ISA) and Signature Wrapping (SWA). Does PDFBox takes this care automatically or do we need to enforce additionally in code to take care of this 回答1: On the attacks themselves To start with, the attacks mentioned have been developed in a master thesis ("Security of PDF

问题 Currently Iam creating a digital and electronic signature using apache pdfbox. Recently i came to know the vulnerabilities in digital and electronic signature like Universal Signature Forgery (USF), Incremental Saving Attack (ISA) and Signature Wrapping (SWA). Does PDFBox takes this care automatically or do we need to enforce additionally in code to take care of this 回答1: On the attacks themselves To start with, the attacks mentioned have been developed in a master thesis ("Security of PDF