itext pdf：如何定位页脚上的元素

Question

我想使用itext生成pdf文件。我需要在最后一页的页脚上添加一个元素（段落）。我不知道如何将元素放置在该位置。

Answer 1

import com.lowagie.text.Document; 
import com.lowagie.text.DocumentException; 
import com.lowagie.text.Element; 
import com.lowagie.text.ExceptionConverter; 
import com.lowagie.text.Image; 
import com.lowagie.text.Phrase; 
import com.lowagie.text.Rectangle; 
import com.lowagie.text.pdf.PdfPCell; 
import com.lowagie.text.pdf.PdfPTable; 
import com.lowagie.text.pdf.PdfPageEventHelper; 
import com.lowagie.text.pdf.PdfWriter; 

public class PdfHeaderDecorator extends PdfPageEventHelper 
{ 

    public PdfHeaderDecorator() 
    { 
    super(); 
    } 

    public void onEndPage(PdfWriter writer, Document document) 
    { 
    PdfPTable tableF = new PdfPTable(3); 

    try 
    { 

     tableF.setWidths(new int[] 
     { 24, 24, 2 }); 
     tableF.setTotalWidth(527); 
     tableF.setLockedWidth(true); 
     tableF.getDefaultCell().setFixedHeight(9); 
     tableF.getDefaultCell().setBorder(Rectangle.BOTTOM); 
     tableF.addCell(new Phrase("SOME Text")); 
     tableF.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT); 
     tableF.addCell(new Phrase(String.format("page %d ", writer.getPageNumber()))); 
     PdfPCell cell = new PdfPCell(new Phrase("bla bla bla")); 
     cell.setBorder(Rectangle.BOTTOM); 
     tableF.addCell(cell); 
     tableF.writeSelectedRows(0, -1, 34, 30, writer.getDirectContent()); 

    } 
    catch (DocumentException de) 
    { 
     throw new ExceptionConverter(de); 
    } 
    } 
} 

而且你的头装饰添加到页面事件

pdfWriter.setPageEvent(new PdfHeaderDecorator());