public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException
 {
  File file = new File("D:\\b.doc");
  try
  {
   FileInputStream in = new FileInputStream("D:\\b.doc");
   // HWPFFileSystem hwpfsys = new HWPFFileSystem();
   // hwpfsys.getStream("d://b.doc");
   POIFSFileSystem pfs = new POIFSFileSystem(in);
   HWPFDocument hwpf = new HWPFDocument(pfs);
   // hwpf.write(hwpfsys.getStream("D://e.doc"));
   // Range range = new Range(0, (int) file.length(), hwpf);
   Range range = hwpf.getRange();
   StyleSheet styleSheet = hwpf.getStyleSheet();

   TableIterator it = new TableIterator(range);
//遍历一个DOC中的所有表格
   while (it.hasNext())
   {
    Table tb = (Table) it.next();

  //遍历表格的行
    for (int i = 0; i < tb.numRows(); i++)
    {
     TableRow tr = tb.getRow(i);
//遍历表格的列
     for (int j = 0; j < tr.numCells(); j++)
     {
    //往表格中插入数据 
     TableCell td = tr.getCell(j);
      String text = "第" + i + "行第" + j + "列";
      int p = td.numParagraphs();
      Paragraph para = td.getParagraph(p);
      ParagraphProperties pp = new ParagraphProperties();
      para.insertBefore(text);
     }
    }
   }
//在表格外面插入内容  
 CharacterProperties cp = new CharacterProperties();
   cp.setBold(true);
   cp.setCharacterSpacing(10);
   cp.setChse(cp.SPRM_CHARSCALE);
   cp.setCapitalized(true);
   int p = range.numParagraphs();
   Paragraph para = range.getParagraph(p - 1);
   para.insertAfter("test poi successful!", cp);
   para.insertAfter("测试成功", cp);
   response.setContentType("application/vnd.ms-word");
   response.setHeader("Content-disposition", "attachment;filename=e.doc");
   OutputStream out = response.getOutputStream();
   hwpf.write(out);
   out.close();
  }
  catch (Exception ex)
  {
   ex.printStackTrace();
  }
 }

 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException
 {
  doGet(request, response);
 }

}