如何使用iText在PDF中創建可編輯字段

Question

1）首先我嘗試以下。下面的代碼是創建表的第二列可編輯，但是我想在相應的兩行的第二列中同時具有myVO.getClientAuthorized（）和myVO.getClientSize（）的值，但是使用以下代碼在第二列中沒有任何值。

public PdfPTable createTable(MyVO myVO){
            PdfPTable table = null;

            table = new PdfPTable(2);
            table.getDefaultCell().setBorder(Rectangle.NO_BORDER);
            PdfPCell cell;
            cell = new PdfPCell(new Phrase(
                    myVO.getClientAuthorizedLbl()));
            table.addCell(cell);
            cell = new PdfPCell();
            cell.setCellEvent(new MyCellField(myVO
                    .getClientAuthorized()));
            table.addCell(cell);
            cell = new PdfPCell(new Phrase(
                    myVO.getClientSizeLbl()));
            table.addCell(cell);
            cell = new PdfPCell();
            cell.setCellEvent(new MyCellField(myVO
                    .getClientSize()));
            table.addCell(cell);

            return table;
}


class MyCellField implements PdfPCellEvent {
        protected String fieldname;
        public MyCellField(String fieldname) {
            this.fieldname = fieldname;
        }

        public void cellLayout(PdfPCell cell, Rectangle rectangle,
                PdfContentByte[] canvases) {
            final PdfWriter writer = canvases[0].getPdfWriter();
            final TextField textField = new TextField(writer, rectangle,
                    fieldname);
            try {
                final PdfFormField field = textField.getTextField();
                writer.addAnnotation(field);
            } catch (final IOException ioe) {
                throw new ExceptionConverter(ioe);
            } catch (final DocumentException de) {
                throw new ExceptionConverter(de);
            }
        }
    }

2）然后我將代碼更改為以下代碼。

cell = new PdfPCell(); 
with 
cell = new PdfPCell(new Phrase(myVO.getClientAuthorized())); 
and second cell = new PdfPCell(); 
with 
cell = new PdfPCell(new Phrase(myVO.getClientSize()));

below is changed code :

public PdfPTable createTable(MyVO myVO){
            PdfPTable table = null;

            table = new PdfPTable(2);
            table.getDefaultCell().setBorder(Rectangle.NO_BORDER);
            PdfPCell cell;
            cell = new PdfPCell(new Phrase(
                    myVO.getClientAuthorizedLbl()));
            table.addCell(cell);
            cell = new PdfPCell(new Phrase(myVO.getClientAuthorized()));
            cell.setCellEvent(new MyCellField(myVO
                    .getClientAuthorized()));
            table.addCell(cell);
            cell = new PdfPCell(new Phrase(
                    myVO.getClientSizeLbl()));
            table.addCell(cell);
            cell = new PdfPCell(new Phrase(myVO
                    .getClientSize()));
            cell.setCellEvent(new MyCellField(myVO
                    .getClientSize()));
            table.addCell(cell);

            return table;
}


class MyCellField implements PdfPCellEvent {
        protected String fieldname;
        public MyCellField(String fieldname) {
            this.fieldname = fieldname;
        }

        public void cellLayout(PdfPCell cell, Rectangle rectangle,
                PdfContentByte[] canvases) {
            final PdfWriter writer = canvases[0].getPdfWriter();
            final TextField textField = new TextField(writer, rectangle,
                    fieldname);
            try {
                final PdfFormField field = textField.getTextField();
                writer.addAnnotation(field);
            } catch (final IOException ioe) {
                throw new ExceptionConverter(ioe);
            } catch (final DocumentException de) {
                throw new ExceptionConverter(de);
            }

        }
    }

現在，我在第二列中獲取文本，但此文本不再可編輯。 請幫忙。 提前致謝。

Answer 1

我為上述問題找到了解決方案。

我在cellLayout（）方法中添加了以下代碼。

textField.setText(textField.getFieldName());

因此完整的cellLayout（）方法看起來像下面這樣：

public void cellLayout(PdfPCell cell, Rectangle rectangle,
                PdfContentByte[] canvases) {
            final PdfWriter writer = canvases[0].getPdfWriter();
            final TextField textField = new TextField(writer, rectangle,
                    fieldname);
            textField.setText(textField.getFieldName());
            try {
                final PdfFormField field = textField.getTextField();
                writer.addAnnotation(field);
            } catch (final IOException ioe) {
                throw new ExceptionConverter(ioe);
            } catch (final DocumentException de) {
                throw new ExceptionConverter(de);
            }
        }

這樣，我可以在生成的PDF中看到文本，也可以對其進行編輯。