Question

使用iText，我必须创建一个带有大PdfPTable的PDF，并在页脚上创建总页数（类似于'Y页的X'）。我看了this例子，但我真的不明白它是如何工作的。目前我的代码是这样的：

        PdfPTable table = new PdfPTable(10);

        //something to fill the table

        baos = new ByteArrayOutputStream();
        document = new Document();
        PdfWriter writer = PdfWriter.getInstance(document, baos);
        document.open();

        PdfTemplate totalPage = writer.getDirectContent().createTemplate(30, 16);
        ColumnText columnTable = new ColumnText(writer.getDirectContent());
        columnTable.addElement(table);

        while(true) {
            ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_RIGHT, new Phrase("Pag. " + String.format("%d", writer.getPageNumber()),FONT_N), (document.right() - document.left())/ 2 + document.leftMargin(), document.bottom(), 0);

            //I think something to insert totalPage in the document...

            columnTable.setSimpleColumn(document.left(), document.top(), document.right(), Math.round(document.bottom()*1.5));

            if(!ColumnText.hasMoreText(columnTable.go()))
                break;

            document.newPage();
        }

        //I think something to set totalPage...

        document.close();

有人可以帮助我吗？

Answer 1

使用以下代码替换while循环：

ColumnText columnTable = new ColumnText(writer.getDirectContent());
        columnTable.addElement(table);
        PdfTemplate totalPage = writer.getDirectContent().createTemplate(30, 16);
        try {
            table.setWidths(new int[]{24, 24, 2 });
            table.setTotalWidth(527);
            table.setLockedWidth(true);
            table.getDefaultCell().setFixedHeight(20);
            table.getDefaultCell().setBorder(Rectangle.BOTTOM);
            table.addCell("");
            table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
            table.addCell(String.format("Page %d of", writer.getPageNumber()));
            PdfPCell cell = new PdfPCell(Image.getInstance(totalPage));
            cell.setBorder(Rectangle.BOTTOM);
            table.addCell(cell);
            table.writeSelectedRows(0, -1, 34, 803, writer.getDirectContent());
            ColumnText.showTextAligned(totalPage, Element.ALIGN_LEFT, 
                    new Phrase( String.valueOf(writer.getPageNumber())), 
                    0, 0, 0);
        }
        catch(DocumentException de) {
throw new ExceptionConverter(de);

}

iText - 在新PDF中写入总页数

1 个答案: