I want to create a pdf file using iText 7, but something is wrong:

com.itextpdf.kernel.PdfException: Pdf indirect object belongs to other PDF document. Copy object to current pdf document. at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:195) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:185) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:115) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:187) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:115) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:187) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfOutputStream.write(PdfOutputStream.java:115) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfWriter.writeToBody(PdfWriter.java:383) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfWriter.flushObject(PdfWriter.java:289) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfDocument.flushObject(PdfDocument.java:1572) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfObject.flush(PdfObject.java:159) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfObject.flush(PdfObject.java:127) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfObjectWrapper.flush(PdfObjectWrapper.java:94) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfPage.flush(PdfPage.java:495) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfPage.flush(PdfPage.java:454) ~[kernel-7.0.2.jar:na] at com.itextpdf.kernel.pdf.PdfDocument.close(PdfDocument.java:785) ~[kernel-7.0.2.jar:na] at com.itextpdf.layout.Document.close(Document.java:120) ~[layout-7.0.2.jar:na] at com.xcz.afbp.thirdparty.service.impl.GeneratePDFService.generatePDF(GeneratePDFService.java:160) ~[classes/:na]

my code is:

 public void generatePDF(CreditQueryData creditQueryData, Map<String, UserCreditContentView> contentViewMap, List<PackageCreditContentView> needRetrievedCreditContentList, File pdfFile, BigDecimal score) throws Exception { if (!pdfFile.exists()) { boolean x = pdfFile.createNewFile(); if (!x) { LOG.error("生成文件出错" + pdfFile.getPath()); return; } } PdfDocument pdf = new PdfDocument(new PdfWriter(new FileOutputStream(pdfFile))); Document document = new Document(pdf, PageSize.A4); document.setRenderer(new DocumentRenderer(document)); pdf.addEventHandler(PdfDocumentEvent.END_PAGE, new WatermarkingEventHandler()); try { //operate code just add tableA tableB tableC... } catch (Exception e) { LOG.info(); } finally { document.close(); //exception throws here } }

My only code for style in iText7:

 private PdfFont bfChinese = null;

will be initialized in the invoked constructor of the service.

 public GeneratePDFService() { String PdfFontPath = EnvironmentUtils.getClasspathFilePath("font/MSYH.TTF"); try { bfChinese = PdfFontFactory.createFont(PdfFontPath, "Identity-H", true); } catch (Exception e) { e.printStackTrace(); } }

I tried to set my font as static , but that doesn't help. At this point, I get an exception:

 private void write(PdfIndirectReference indirectReference) { if (document != null && !indirectReference.getDocument().equals(document)) { throw new PdfException(PdfException.PdfIndirectObjectBelongsToOtherPdfDocument); } if (indirectReference.getRefersTo() == null) { write(PdfNull.PDF_NULL); } else if (indirectReference.getGenNumber() == 0) { writeInteger(indirectReference.getObjNumber()). writeBytes(endIndirectWithZeroGenNr); } else { writeInteger(indirectReference.getObjNumber()). writeSpace(). writeInteger(indirectReference.getGenNumber()). writeBytes(endIndirect); } }

This means that I have two different documents, but I do not know how I created the second document. Thank you in advance for your help!

    1 answer 1

    I ran into the same problem (it took me hours to figure out what I was doing wrong). As it turned out, you can use a specific copy of PdfFont for only one document. As soon as you use a PdfFont instance in a document, it becomes attached to it, and you can no longer use it in another document.

    For example:

     class ThisGoesWrong { protected PdfFont font; public ThisGoesWrong() { font = PdfFontFactory.createFont(...); } public void createPdf() { ... Paragraph p = new Paragraph("test").setFont(font); document.add(p); ... } }

    The ThisGoesWrong class creates the correct PDF on the first call to createPdf() , but shows exception as you do when you call it again.

    I found this solution to the problem:

     class ThisWorksOK { public ThisWorksOK() { } public void createPdf() { ... PdfFont font = PdfFontFactory.createFont(...); Paragraph p = new Paragraph("test").setFont(font); document.add(p); ... } }