请稍候..java itext pdf阅读器中的消息

Question

我正在使用java itext pdf阅读器从pdf中读取数据，但是当我运行程序时，我得到以下错误

Please wait... 

If this message is not eventually replaced by the proper contents of the document, your PDF 
viewer may not be able to display this type of document. 

You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by 
visiting  http://www.adobe.com/go/reader_download. 

    For more assistance with Adobe Reader visit  http://www.adobe.com/go/acrreader. 

Windows is either a registered trademark or a trademark of Microsoft Corporation in the United States and/or other countries. Mac is a trademark 
of Apple Inc., registered in the United States and other countries. Linux is the registered trademark of Linus Torvalds in the U.S. and other 
countries.

Pdf包含表单和表格。我正在使用ubutnu和adobe阅读器更新。

Answer 1

这通常是具有XFA表单的pdf的唯一常规内容。因此，这不是错误，而只是通过文本提取来提取。

您可以尝试通过itext的表单相关API来提取表单数据。iText AcroForm API对XFA数据的支持有限，还有一些方法可以提取XFA。