Changes the URL of an AcroForm : AcroForm « PDF « Java Tutorial

1. Java Tutorial
2. PDF
3. AcroForm

import java.io.FileOutputStream;
import java.util.HashMap;

import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.PRIndirectReference;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfString;

public class MainClass {
  public static void main(String[] args) throws Exception {
    PdfReader reader = new PdfReader("2.pdf");
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("3.pdf"));
    AcroFields form = stamper.getAcroFields();
    HashMap fields = form.getFields();
    AcroFields.Item field = (AcroFields.Item) fields.get("PushMe");
    PRIndirectReference ref = (PRIndirectReference) field.widget_refs.iterator().next();
    PdfDictionary object = (PdfDictionary) reader.getPdfObject(ref.getNumber());
    PdfDictionary action = (PdfDictionary) object.get(PdfName.A);
    PdfDictionary file = (PdfDictionary) action.get(PdfName.F);
    file.put(PdfName.F, new PdfString("http://yourserver/form.jsp"));
    stamper.close();

  }
}