Try this:

AcroFields acroFields = stamper.getAcroFields();
Map<String, AcroFields.Item> fields = acroFields.getFields();


2014-10-08 9:45 GMT+02:00 <tanshi...@sina.com>:

>
> Dear all,
>
>
> I have a problem with itext , when i open a pdf to get the fields with the
> code behind.
>
>
> AcroFields acroFields = pdf.AcroFields;
>
>
> but the returned acrofields is null.
>
> it worked  fine in some pdf, but there was problem in some other  pdf.
>
>
>
>
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>
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> Many questions posted to this list can (and will) be answered with a
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> Please check the keywords list before you ask for examples:
> http://itextpdf.com/themes/keywords.php
>
------------------------------------------------------------------------------
Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer
Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports
Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper
Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference 
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples: 
http://itextpdf.com/themes/keywords.php

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