XWPFDocument returning 1 number of pages for docx file

问题

I am using XWPFDocument library to find number of pages in docx file. Below is my code snippet :

XWPFDocument docx = null;
            try {
                docx = new XWPFDocument(POIXMLDocument.openPackage(filePath));
                totalPages = docx.getProperties().getExtendedProperties().getUnderlyingProperties().getPages();
            } catch (IOException e) {
                logger.error("Error while loading word document at file location {}", filePath);
                totalPages = 0;
            }

For some .docx it is working fine but for some files it is returning 1 inspite of having more than 30 pages.

来源：https://stackoverflow.com/questions/44650147/xwpfdocument-returning-1-number-of-pages-for-docx-file