Java Tutorial/PDF/AcroForm

Changes the URL of an AcroForm

   <source lang="java">

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();
 }

}</source>

Fill AcroForm

   <source lang="java">

import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.PageSize; import com.lowagie.text.Rectangle; import com.lowagie.text.pdf.AcroFields; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.GrayColor; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.PdfStamper; import com.lowagie.text.pdf.PdfWriter; import com.lowagie.text.pdf.TextField; public class MainClass {

 public static void main(String[] args) throws Exception {
   Document document = new Document(PageSize.A4);
   PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(
       "HelloWorldForm.pdf"));
   document.open();
   BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI,
       BaseFont.NOT_EMBEDDED);
   PdfContentByte cb = writer.getDirectContent();
   cb.beginText();
   cb.setFontAndSize(bf, 12);
   cb.moveText(36f, 788);
   cb.showText("Hello");
   cb.endText();
   TextField tf = new TextField(writer, new Rectangle(67, 785, 340, 800),
       "Who");
   tf.setFontSize(12);
   tf.setFont(bf);
   tf.setText("Who?");
   tf.setTextColor(new GrayColor(0.5f));
   writer.addAnnotation(tf.getTextField());
   document.close();
   PdfReader reader;
   PdfStamper stamper;
   AcroFields form;
   reader = new PdfReader("HelloWorldForm.pdf");
   stamper = new PdfStamper(reader, new FileOutputStream(
       "HelloWorldFilledInForm.pdf"));
   form = stamper.getAcroFields();
   form.setField("Who", "World");
   stamper.close();
   reader = new PdfReader("HelloWorldForm.pdf");
   stamper = new PdfStamper(reader, new FileOutputStream(
       "HelloWorldFilledInFlattened.pdf"));
   form = stamper.getAcroFields();
   form.setField("Who", "People");
   stamper.setFormFlattening(true);
   stamper.close();
 }

}</source>