Java iText-5.0.1+；用虚线绘制PdfPTable的边框

在iText-5.0.1中，有没有办法用虚线（如UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

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您也可以使用PdfPCellEvent自己绘制边界。有不同的层要添加到。请参见此处的API:

正如建议的那样，使用PdfPCellEvent。下面的代码应该可以帮助您完成大部分任务。 通过覆盖单元格事件，您基本上可以告诉iText您认为它应该如何绘制单元格。无论何时将任何单元格添加到表中，它们都将遵循您的规则

 class CustomCell implements PdfPCellEvent {
 public void cellLayout(PdfPCell cell, Rectangle rect,
                   PdfContentByte[] canvas) {
                   PdfContentByte cb = canvas[PdfPTable.LINECANVAS];
                   cb.setLineDash(new float[] {3.0f, 3.0f}, 0);           
                   cb.stroke();
          }
 }

 public class Main {

         public static void main(String[] args) throws Exception {
             Document document = new Document();
             PdfWriter.getInstance(document, new FileOutputStream("output.pdf"));
             document.open();
             CustomCell border = new CustomCell();

             PdfPTable table = new PdfPTable(6);
             PdfPCell cell;

             for (int i = 1; i <= 6; i++) {
               cell = new PdfPCell(new Phrase("test"));              
               cell.setCellEvent(border);
               table.addCell(cell);
             }

             document.add(table);
             document.close();
     }
}

类CustomCell实现PdfPCellEvent{ 公共空心单元布局（PdfPCell单元，矩形矩形， PdfContentByte[]画布）{ PdfContentByte cb=canvas[PdfPTable.LINECANVAS]； cb.setLineDash（新浮点[]{3.0f，3.0f}，0）； cb.stroke（）； } } 公共班机{ 公共静态void main（字符串[]args）引发异常{ 文档=新文档（）； getInstance（文档，新文件outputStream（“output.pdf”）； document.open（）； CustomCell边框=新的CustomCell（）； PdfPTable=新的PdfPTable（6）； PDFP细胞；

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对于（int i=1；i带破折号的单元格：

public class UnderlinedCell implements PdfPCellEvent {

    public void cellLayout(PdfPCell cell, Rectangle position,
        PdfContentByte[] canvases) {
        PdfContentByte canvas = canvases[PdfPTable.LINECANVAS];
        canvas.setLineWidth(0.5f);
        canvas.setLineDash(3f, 3f);
        canvas.moveTo(position.getLeft(), position.getBottom());
        canvas.lineTo(position.getRight(), position.getBottom());

        canvas.stroke();
    }
}

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我想我们无法设置单元格的高度？我在尝试您的代码时通过E-Clipse收到了以下错误消息…“无法访问pdf类型的封闭实例…”知道发生了什么吗？

PdfPCell Border1 = new PdfPCell(new Paragraph("-----------------------------------------------------------------------------------------------------------------------"));
            Border1.Border = 0;
            Border1.VerticalAlignment = 3;
            Border1.FixedHeight = 5F;
            Border1.PaddingLeft = -5;
            Border1.PaddingRight = -5;
            Border1.PaddingBottom = -5;
            Border1.PaddingTop = -5;

public class UnderlinedCell implements PdfPCellEvent {

    public void cellLayout(PdfPCell cell, Rectangle position,
        PdfContentByte[] canvases) {
        PdfContentByte canvas = canvases[PdfPTable.LINECANVAS];
        canvas.setLineWidth(0.5f);
        canvas.setLineDash(3f, 3f);
        canvas.moveTo(position.getLeft(), position.getBottom());
        canvas.lineTo(position.getRight(), position.getBottom());

        canvas.stroke();
    }
}