maven - How to get all headers in a XWPFDocument -

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i'm trying extract headers in docx file have. code use:

 fileinputstream fs = new fileinputstream(new file("myfile.docx"));  xwpfdocument doc = new xwpfdocument(opcpackage.open(fs));  list<xwpfheader> list = doc.getheaderlist();

and if do:

system.out.println(list.size());

it prints out 0, have 4 headers in document. way have succeeded extract text document using following code:

 xwpfwordextractor wx = new xwpfwordextractor(doc);    string text = wx.gettext();    system.out.println("text = "+text );

this structure of document:

enter image description here

any ideas on problem might be?


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