java导出exce动态l合并单元格

采用的是poi技术

框架式  ssh 使用的是struts1

 

 

/*

*  

* 导出联系人  

*  

* @param request  

* @param response

  */

 public void outExcel(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response) {  

 ServletContext servletContext = this.getServletContext();  

 WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);   

TraceLxrService service = getTraceLxrService();  

 List<AbstractTraceLxr> list = service.findAllQX();

  

  try {

   // 第一步，创建一个webbook，对应一个Excel文件

   HSSFWorkbook wb = new HSSFWorkbook();

   // 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet  

  HSSFSheet sheet = wb.createSheet("区县工作小组名单");

   // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short

   HSSFRow row = sheet.createRow((int) 0);  

  // 第四步，创建单元格，并设置值表头 设置表头居中  

  HSSFCellStyle style = wb.createCellStyle();   

 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

// 创建一个居中格式       HSSFCell cell = row.createCell((short) 0);  

    cell.setCellValue("区县");  

    cell.setCellStyle(style);

   cell = row.createCell((short) 1);  

    cell.setCellValue("分工");

    cell.setCellStyle(style);  

   cell = row.createCell((short) 2);   

   cell.setCellValue("姓名");   

   cell.setCellStyle(style);

   cell = row.createCell((short) 3);  

  cell.setCellValue("部门");  

  cell.setCellStyle(style);

   cell = row.createCell((short) 4);  

  cell.setCellValue("职务");  

  cell.setCellStyle(style);

   cell = row.createCell((short) 5);  

  cell.setCellValue("电话");  

  cell.setCellStyle(style);

   cell = row.createCell((short) 6);  

  cell.setCellValue("手机");  

  cell.setCellStyle(style);

   cell = row.createCell((short) 7);   

   cell.setCellValue("传真");   

   cell.setCellStyle(style);

   cell = row.createCell((short) 8);  

   cell.setCellValue("Email");   

   cell.setCellStyle(style);

   cell = row.createCell((short) 9);

   cell.setCellValue("修改");   

   cell.setCellStyle(style);

   cell = row.createCell((short) 10);

   cell.setCellValue("删除");  

   cell.setCellStyle(style);        

          List<AbstractTraceLxr> newlist=new ArrayList<AbstractTraceLxr>();

          List<String> list1 = service.findAllQXDz();     

           for (int i = 0; i < list1.size(); i++) {        

           for (int p = 0; p < list.size(); p++) {     

           if(list1.get(i).equals(list.get(p).getSsqx())){    

           TraceLxr sf=new TraceLxr();     

      sf.setSsqx(list.get(p).getSsqx());       

      sf.setFg(list.get(p).getFg());       

      sf.setName(list.get(p).getName());

      sf.setDept(list.get(p).getDept());    

      sf.setJob(list.get(p).getJob());    

      sf.setTel(list.get(p).getTel());     

      sf.setMobile(list.get(p).getMobile());    

      sf.setFax(list.get(p).getFax());     

      sf.setEmail(list.get(p).getEmail());  

      sf.setDelflag("修改");     

      sf.setDelflag("删除");  

      newlist.add(sf);     

   }      

  }    

  }     

       for (int k1 = 0; k1 < newlist.size(); k1++) {   

       row = sheet.createRow((int) k1 + 1);  

      TraceLxr bgMultiLevel = (TraceLxr) newlist.get(k1);

      row.createCell((short) 0).setCellValue(bgMultiLevel.getSsqx());    

      row.createCell((short) 1).setCellValue(bgMultiLevel.getFg());   

      row.createCell((short) 2).setCellValue(bgMultiLevel.getName());    

      row.createCell((short) 3).setCellValue(bgMultiLevel.getDept());   

      row.createCell((short) 4).setCellValue(bgMultiLevel.getJob());

      row.createCell((short) 5).setCellValue(bgMultiLevel.getTel());  

      row.createCell((short) 6).setCellValue(bgMultiLevel.getMobile());

      row.createCell((short) 7).setCellValue(bgMultiLevel.getFax());   

      row.createCell((short) 8).setCellValue(bgMultiLevel.getEmail());  

      row.createCell((short) 9).setCellValue("0");    

      row.createCell((short) 10).setCellValue("1");  

    if(k1!=0){        

    if(newlist.get(k1-1).getSsqx().equals(newlist.get(k1).getSsqx())){    

       //重点在这里动态合并

          CellRangeAddress cra=new CellRangeAddress(k1, 1+k1, 0, 0);      

                     //在sheet里增加合并单元格           

          sheet.addMergedRegion(cra);        

           }              

     }    

}       

   response.reset();   

   response.setContentType("application/vnd.ms-excel;charset=utf-8");  

  response.setHeader("Content-Disposition", "attachment;filename=" + new String(("exportExcel".toString() + ".xls").getBytes(), "iso-8859-1"));

   OutputStream os = response.getOutputStream();   

    wb.write(os);    os.close();      

    }catch (IOException e) {  

  // TODO Auto-generated catch block  

  e.printStackTrace();

     }

 }

来源：https://www.cnblogs.com/liuy1/p/5672898.html