Hello,
The source code from PDFDocumentCatalog is pretty simple:
/** * This will get the documents acroform.
This will return null if
* no acroform is part of the document.
*
* *@return* The documents acroform.
*/
*public* *PDAcroForm*
<http://www.java2s.com/Open-Source/Java-Document/PDF/PDFBox-1.4.0/org/apache/pdfbox/pdmodel/interactive/form/PDAcroForm.java.htm>
getAcroForm() {
*if* (acroForm == null) {
*COSDictionary*
<http://www.java2s.com/Open-Source/Java-Document/PDF/PDFBox-1.4.0/org/apache/pdfbox/cos/COSDictionary.java.htm>
acroFormDic = (*COSDictionary*
<http://www.java2s.com/Open-Source/Java-Document/PDF/PDFBox-1.4.0/org/apache/pdfbox/cos/COSDictionary.java.htm>)
root
.getDictionaryObject(COSName.ACRO_FORM);
*if* (acroFormDic != null) {
acroForm = *new* *PDAcroForm*
<http://www.java2s.com/Open-Source/Java-Document/PDF/PDFBox-1.4.0/org/apache/pdfbox/pdmodel/interactive/form/PDAcroForm.java.htm>(document,
acroFormDic);
}
}
*return* acroForm;
}
It' looks like your document does not contains an acroForm, but
something like a form.
Try look deeper in your document and parse all DictionnaryObject's from it.
Regards,
Kevin
2011/10/12 eric <[email protected]>
> I tried 1.6 and 1.7 both, and the problem is same, it can't read any form
> from the test file
>
> PDAcroForm acroForm = catalog.getAcroForm(); //return null
>
> the acroForm is null but the test pdf file does have a form, can anybody
> help me?
>
> post the src file and test file
> ///////////////////////////////
> package Pdfbox.test;
>
> import java.net.URL;
>
> import java.io.File;
> import java.io.FileOutputStream;
> import java.io.IOException;
> import java.io.OutputStreamWriter;
> import java.io.Writer;
>
> import java.io.BufferedWriter;
> import java.io.FileInputStream;
> import java.io.FileNotFoundException;
> import java.io.FileWriter;
>
> import java.util.Iterator;
> import java.util.List;
>
> import org.apache.pdfbox.pdfparser.PDFParser;
> import org.apache.pdfbox.pdmodel.PDDocument;
> import org.apache.pdfbox.util.PDFTextStripper;
>
> import org.apache.pdfbox.pdmodel.PDDocument;
> import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
> import org.apache.pdfbox.pdmodel.interactive.f orm.PDAcroForm;
> import org.apache.pdfbox.pdmodel.interactive.form.PDField;
>
> import org.apache.pdfbox.exceptions.CryptographyException;
> import org.apache.pdfbox.exceptions.InvalidPasswordException;
>
> public class ReadForms {
>
> private static final String pdfFile = "/root/test_readforms.pdf";//
> Book1.pdf";
>
> public ReadForms() {
>
> }
>
> public static void processField(PDField field, String sLevel, String
> sParent)
> throws IOException {
> List kids = field.getKids();
> if (kids != null) {
> Iterator kidsIter = kids.iterator();
> if (!sParent.equals(field.getPartialName())) {
> sParent = sParent + "." + field.getPartialName();
> }
> System.out.println(sLevel + sParent);
> // System.out.println(sParent + " is of type " +
> // field.getClass().getName());
> while (kidsIter.hasNext()) {
> Object pdfObj = kidsIter.next();
> if (pdfObj instanceof PDField) {
> PDField kid = (PDField) pdfObj;
> proce ssField(kid, "| " + sLevel, sParent);
> }
> }
> } else {
> String outputString = sLevel + sParent + "."
> + field.getPartialName() + " = " + field.getValue()
> + ", type=" + field.getClass().getName();
>
> System.out.println(outputString);
> }
> }
>
> /**
> * This will read a PDF file and print out the form elements. <br />
> see
> * usage() for commandline
> &nb sp; *
> * @param args
> * command line arguments
> *
> * @throws IOException
> * If there is an error importing the FDF document.
> * @throws CryptographyException
> * If there is an error decrypting the document.
> */
> public static void main(String[] args) throws IOException,
> CryptographyException {
>
> // Create the PDF Document
> PDDocument doc = PDDocument.load(pdfFile);
>
> // Extract the catalog
> PDDocumentCatalog catalog = doc.getDocumentCatalog();
>
> // Retrieve the AcroForm
> PDAcroForm acroForm = catalog.getAcroForm();
>
> // Retrieve all fields that should be change
> List listField = acroForm.getFields();
> Iterator<PDField> it = listField.iterator();
>
> // Loop on each field
> while (it.hasNext()) {
> PDField field = (PDField) it.next();
> processField(field, "|--", field.getPartialName());
> }
>
> }
> }
>
>
>
>
