问iText PdfPTable的变化方向

EN

private void exportTableAsPDF(File outputFile) {

    // PDF document
    Document pdfDocument = new Document();
    try {
        PdfWriter pdfWriter = PdfWriter.getInstance(pdfDocument, new FileOutputStream(outputFile));

        // Used to rotate the page - iText recommended this approach in an answer to a question referenced below
        // https://developers.itextpdf.com/question/how-rotate-page-while-creating-pdf-document
        class RotateEvent extends PdfPageEventHelper {
            public void onStartPage(PdfWriter writer, Document document) {
                writer.addPageDictEntry(PdfName.ROTATE, PdfPage.SEASCAPE);
            }
        }

        // Rotates each page to landscape
        pdfWriter.setPageEvent(new RotateEvent());
    } catch (Exception e) {
        e.printStackTrace();
    }
    pdfDocument.open();

    // PDF table
    PdfPTable pdfPTable = new PdfPTable(1);

    // Add column header cell
    PdfPCell dateCell = new PdfPCell(new Phrase("Date"));
    pdfPTable.addCell(dateCell);

    // Gets cell data
    LogEntryMapper logEntryMapper = new LogEntryMapper();
    List<LogEntry> logEntries = logEntryMapper.readAll();

    // Adds a cell to the table with "date" data
    for (LogEntry logEntry : logEntries) {
        dateCell = new PdfPCell(new Phrase(logEntry.getLogEntryDate()));
        pdfPTable.addCell(dateCell);
    }

    // Adds the table to the pdf document
    try {
        pdfDocument.add(pdfPTable);
    } catch (DocumentException e) {
        e.printStackTrace();
    }

    pdfDocument.close();
}