问如何在pdf表单模板中使用PDFBox动态填充表

EN

PDDocument pdfDocument = PDDocument.load(new ClassPathResource("sample_template.pdf").getFile());

PDDocumentCatalog docCatalog = pdfDocument.getDocumentCatalog();
PDAcroForm acroForm = docCatalog.getAcroForm();
acroForm.getField("Field1).setValue("Hello");
acroForm.getField("Field2).setValue("World");
.
.
for (Order eachOrder : Orders) {
// Here I want to fill a table with the data.
// Number of columns are fixed but rows are dynamic.

 acroForm.getField("OrderDate").setValue(eachOrder.getDate());
 acroForm.getField("OrderDesc").setValue(eachOrder.getDescription());
}
// The problem with above loop is that it does not creates new rows but it
// keeps on overwriting the first row (which is obvious because in my template there is only 1 row defined with these 2 columns).
// I don't know how to define a variable row in template and fill it with the data.
.
.
acroForm.flatten();
pdfDocument.save("test.pdf");