Code Sample: Extract form field data programmatically from a PDF form in Java

This Java program loads a PDF document and echoes information about all the fields in the form, including field name, type, value, default value, etc… This sample uses Qoppa’s  Java PDF form fields library jPDFFields.

// Load the document
PDFFields pdfDoc = new PDFFields ("C:/myfolder/form04.pdf", null);
 
// get list of fields
Vector<FormField> fields = pdfDoc.getFieldList();
 
// loop through the fields
for (int count = 0; count < fields.size(); ++count) 
{
   // get field
   FormField field = fields.get(count);
 
   // field name
   System.out.println("Field Name " + field.getFieldName());
 
  // field type description
  System.out.println("Field Type " + field.getFieldTypeDesc());
 
 // text field
 if (field instanceof TextField) 
 {
   System.out.println("Value " + ((TextField) field).getValue());
   System.out.println("Default Value " + ((TextField) field).getDefaultValue());
 }
 // radio button field
 else if (field instanceof RadioButtonGroupField) 
 {
   System.out.println("Value " + ((RadioButtonGroupField) field).getValue());
   System.out.println("Default Value " + ((RadioButtonGroupField) field).getDefaultValue());
 }
 // check box field
 else if (field instanceof CheckBoxField) 
 {
    System.out.println("Value " + ((CheckBoxField) field).getValue());
    System.out.println("Default Value " + ((CheckBoxField) field).getDefaultValue());
 }
 // combo box field
 else if (field instanceof ComboField) 
 {
   System.out.println("Value " +((ComboField) field).getValue());
   System.out.println("Options " +((ComboField) field).getExportOptions());
   System.out.println("Default Value " + ((ComboField) field).getDefaultValue());
 }
 // list field
 else if (field instanceof ListField) 
 {
   System.out.println("Value " + ((ListField) field).getValues());
   System.out.println("Options " + ((ListField) field).getExportOptions());
   System.out.println("Default Values " +((ListField) field).getDefaultValue());
 }
 // signature field
 else if (field instanceof SignatureField) 
 {
   System.out.println("Signature Name " + ((SignatureField) field).getSignName());
   System.out.println("Signature Date " + ((SignatureField) field).getSignDateTime());
 }
}

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