我被这个问题困扰了一段时间。我在画一张画 pie chart 并显示 jtable data . 我不能 align 文件中的内容 pdf file . 如何对齐 jtable data 以及 pie chart 为了这个 pdf . 我已经提到我的 code 下面有一个 image .

如你所见，我需要调整我的 jtable data 有点顶，而且它必须适合 width 的 page .

private void graphical_to_pdf() {
    graph_table.setSize(graph_table.getPreferredSize());
    JTableHeader th = graph_table.getTableHeader();
    th.setSize(th.getPreferredSize());
    PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 800, 800, 0.65f);
    com.itextpdf.text.Font f = new com.itextpdf.text.Font(com.itextpdf.text.Font.FontFamily.TIMES_ROMAN, 18.0f, com.itextpdf.text.Font.NORMAL, BaseColor.BLACK);
    Document doc = new Document(new com.itextpdf.text.Rectangle(900, 900));
    //Creating a paper to store the jtable contents
    Paper paper = new Paper();
    paper.setSize(800, 800);
    paper.setImageableArea(0, 100, 800, 800);
    PageFormat pf = new PageFormat();
    pf.setPaper(paper);
    Printable printable = graph_table.getPrintable(JTable.PrintMode.NORMAL, null, null);
    try {
        PdfWriter writer;
        writer = PdfWriter.getInstance(doc, new FileOutputStream(save_pdf.getSelectedFile().getAbsoluteFile() + ".pdf"));
        writer.setViewerPreferences(PdfWriter.PageLayoutSinglePage);
        doc.open();
        int width = 375;
        int height = 300;
        JFreeChart chart = create_pie_chart_count();
        doc.add(new Paragraph("Some TExt", f));
        doc.add(new Paragraph("Some Text", f));
        doc.add(new Paragraph("Document Generated On - " + generatedDate, f));
        BufferedImage bufferedImage = chart.createBufferedImage(width, height);
        Image image = Image.getInstance(writer, bufferedImage, 1.0f);
        image.scalePercent(100f);
        image.setAlignment(image.MIDDLE);
        doc.add(image);
        PdfAction action = PdfAction.gotoLocalPage(1, pdfDest, writer);
        writer.setOpenAction(action);
            BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = img.createGraphics();
        int page = 0;
        int result = Printable.NO_SUCH_PAGE;
        PdfContentByte cb = writer.getDirectContent();
        do {
            result = printable.print(g, pf, page);
            if (result == Printable.PAGE_EXISTS) {
                cb.saveState();
                Graphics2D g2 = cb.createGraphics(650, 225);
                result = printable.print(g2, pf, page);
                g2.dispose();
                cb.restoreState();
                page++;
                doc.newPage();
            }
        } while (result == Printable.PAGE_EXISTS);
        g.dispose();
    } catch (Exception e) {
    } finally {
        doc.close();
    }
}