สร้างแบบฟอร์ม PDF ผ่าน Java

String inputFile = DATA_DIR.resolve("sample.pdf").toString();
String outputFile = DATA_DIR.resolve("java-create-form.pdf").toString();
// Open document
try (Document pdfDocument = new Document(inputFile)) {
    Page page = pdfDocument.getPages().get_Item(1);
    // Create a field
    TextBoxField textBoxField = new TextBoxField(
            page,
            new Rectangle(100, 200, 300, 300));
    textBoxField.setPartialName("textbox1");
    textBoxField.setValue("Text Box");

    Border border = new Border(textBoxField);
    border.setWidth(5);
    border.setDash(new Dash(1, 1));
    textBoxField.setBorder(border);

    textBoxField.setColor(Color.getGreen());

    // Add field to the document
    pdfDocument.getForm().add(textBoxField, 1);

    // Save modified PDF
    pdfDocument.save(outputFile);
}