itext를 사용하여 pdf를 수정하는 동안 예외 발생

itext를 사용하여 pdf 문서를 수정하는 동안 예외가 발생합니다. 문제는 언젠가 작동하고 때로는 오류가 발생하는 것처럼 매우 산발적입니다.

at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.access$6100(PdfContentStreamProcessor.java:60)
at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor$Do.invoke(PdfContentStreamProcessor.java:991)
at com.itextpdf.text.pdf.pdfcleanup.PdfCleanUpContentOperator.invoke(PdfCleanUpContentOperator.java:140)
at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.invokeOperator(PdfContentStreamProcessor.java:286)
at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.processContent(PdfContentStreamProcessor.java:425)
at com.itextpdf.text.pdf.pdfcleanup.PdfCleanUpProcessor.cleanUpPage(PdfCleanUpProcessor.java:160)
at com.itextpdf.text.pdf.pdfcleanup.PdfCleanUpProcessor.cleanUp(PdfCleanUpProcessor.java:135)
at RedactionClass.tgestRedactJavishsInput(RedactionClass.java:56)
at RedactionClass.main(RedactionClass.java:23)

수정에 사용하는 코드는 다음과 같습니다.

public static void testRedact() throws IOException, DocumentException {

    InputStream resource = new FileInputStream("D:/itext/edited_120192824_5 (1).pdf");
    OutputStream result = new FileOutputStream(new File(OUTPUTDIR,
            "aviteshs.pdf"));

    PdfReader reader = new PdfReader(resource);
    PdfStamper stamper = new PdfStamper(reader, result);
    int pageCount = reader.getNumberOfPages();
    Rectangle linkLocation1 = new Rectangle(440f, 700f, 470f, 710f);
    Rectangle linkLocation2 = new Rectangle(308f, 205f, 338f, 215f);
    Rectangle linkLocation3 = new Rectangle(90f, 155f, 130f, 165f);
    List<PdfCleanUpLocation> cleanUpLocations = new ArrayList<PdfCleanUpLocation>();
    for (int currentPage = 1; currentPage <= pageCount; currentPage++) {
        if (currentPage == 1) {
            cleanUpLocations.add(new PdfCleanUpLocation(currentPage,
                    linkLocation1, BaseColor.BLACK));
            cleanUpLocations.add(new PdfCleanUpLocation(currentPage,
                    linkLocation2, BaseColor.BLACK));
            cleanUpLocations.add(new PdfCleanUpLocation(currentPage,
                    linkLocation3, BaseColor.BLACK));
        } else {
            cleanUpLocations.add(new PdfCleanUpLocation(currentPage,
                    linkLocation1, BaseColor.BLACK));
        }
    }
    PdfCleanUpProcessor cleaner = new PdfCleanUpProcessor(cleanUpLocations,
            stamper);
    try {
        cleaner.cleanUp();
    } catch (Exception e) {
        e.printStackTrace();
    }
    stamper.close();
    reader.close();

}

고객 문서로 인해 공유 할 수 없으며 동일한 테스트 데이터를 찾으려고합니다.

여기에서 문서를 찾으십시오.

https://drive.google.com/file/d/0B-zalNTEeIOwM1JJVWctcW8ydU0/view?usp=drivesdk