如何在PDFBox API 2中获取字段页面？

这将向您显示该字段出现在什么页面上（从0开始）：

PDField field = acroForm.getField( "date" );for (PDAnnotationWidget widget : field.getWidgets()){    PDPage page = widget.getPage();    if (page == null)    {        // incorrect PDF. Plan B: try all pages to check the annotations.        for (int p = 0; p < doc.getNumberOfPages(); ++p)        { List<PDAnnotation> annotations = doc.getPage(p).getAnnotations(); for (PDAnnotation ann : annotations) {     if (ann.getCOSObject() == widget.getCOSObject())     {         System.out.println("found at page: " + p);         break;     } }        }        continue;    }    int pageNum = pdfdocument.getPages().indexOf(page);    System.out.println("found at page: " + pageNum);}