java操作Excel之POI（6）使用POI实现使用模板批量添加数据

action是用struts2写的；前端界面easyUI写的，

前端：

 <!DOCTYPE html>
 <html>
 <head>
     <meta charset="UTF-8">
     <title>Basic DataGrid - jQuery EasyUI Demo</title>
     <link rel="stylesheet" type="text/css" href="jquery-easyui-1.3.3/themes/default/easyui.css">
     <link rel="stylesheet" type="text/css" href="jquery-easyui-1.3.3/themes/icon.css">
     <script type="text/javascript" src="jquery-easyui-1.3.3/jquery.min.js"></script>
     <script type="text/javascript" src="jquery-easyui-1.3.3/jquery.easyui.min.js"></script>
     <script type="text/javascript" src="jquery-easyui-1.3.3/locale/easyui-lang-zh_CN.js"></script>
     <script>
         //批量导入数据，打开dialog
         function openUploadFileDialog(){
             $("#dlg2").dialog('open').dialog('setTitle','批量导入数据');
         }

         //下载批量导入模板
         //userExporTemplate.xls位于WebContent/template/下面
         //一个纯的js来下载模板
         function downloadTemplate(){
             window.open('template/userExporTemplate.xls');
         }

         //上传Excel文件，交给后台解析
         //其中uploadForm的action=user!upload
         function uploadFile(){
             $("#uploadForm").form("submit",{
                 success:function(result){
                     var result=eval('('+result+')');
                     if(result.errorMsg){
                         $.messager.alert("系统提示",result.errorMsg);
                     }else{
                         $.messager.alert("系统提示","上传成功");
                         $("#dlg2").dialog("close");
                         $("#dg").datagrid("reload");
                     }
                 }
             });
         }
     </script>
 </head>
 <body>
     <!-- 一排操作按钮 -->
     <div id="toolbar">
         <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-import" plain="true" onclick="openUploadFileDialog()">用模版批量导入数据</a>
     </div>

     <!-- 批量导入数据模板Excel 的dialog -->
     <div id="dlg2" class="easyui-dialog" style="width:400px;height:180px;padding:10px 20px"
             closed="true" buttons="#dlg-buttons2">
         <form id="uploadForm" action="user!upload" method="post" enctype="multipart/form-data">
             <table>
                 <tr>
                     <td>下载模版：</td>
                     <td><a href="javascript:void(0)" class="easyui-linkbutton"  onclick="downloadTemplate()">导入模版</a></td>
                 </tr>
                 <tr>
                     <td>上传文件：</td>
                     <td><input type="file" name="userUploadFile"></td>
                 </tr>
             </table>
         </form>
     </div>

     <div id="dlg-buttons2">
         <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-ok" onclick="uploadFile()">上传</a>
         <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$('#dlg2').dialog('close')">关闭</a>
     </div>
 </body>
 </html>

后端：

UserAction中upload方法：

 public class UserAction extends ActionSupport{

     private File userUploadFile;    //用来接收上传的文件

     public File getUserUploadFile() {
         return userUploadFile;
     }
     public void setUserUploadFile(File userUploadFile) {
         this.userUploadFile = userUploadFile;
     }

     /**
     *    上传文件，解析Excel
     */
     public String upload() throws Exception{
         POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(userUploadFile));
         HSSFWorkbook wb = new HSSFWorkbook(fs);
         HSSFSheet hssfSheet =  wb.getSheetAt(0);     //获取第一个sheet页
         if(hssfSheet != null){
             for(int rowNum=1; rowNum<=hssfSheet.getLastRowNum(); rowNum++){
                 HSSFRow hssfRow = hssfSheet.getRow(rowNum);
                 if(hssfRow == null){
                     continue;
                 }
                 User user = new User();
                 user.setName(ExcelUtil.formatCell(hssfRow.getCell(0)));
                 user.setPhone(ExcelUtil.formatCell(hssfRow.getCell(1)));
                 user.setEmail(ExcelUtil.formatCell(hssfRow.getCell(2)));
                 user.setQq(ExcelUtil.formatCell(hssfRow.getCell(3)));
                 Connection conn = null;
                 try{
                     con=dbUtil.getCon();
                     userDao.userAdd(con, user);
                 }catch(Exception e){
                     e.printStackTrace();
                 }finally{
                     dbUtil.closeCon(con);
                 }
             }
         }
         JSONObject result=new JSONObject();
         result.put("success", "true");
         ResponseUtil.write(ServletActionContext.getResponse(), result);
         return null;
     }

 }

对单元格进行分类处理（String、boolean、number）的ExcelUtil：

 /**
 *    处理Excel的util
 */
 public class ExcelUtil{

     /**
     *    传入Cell，根据Cell的类型转化，返回的都是String
     */
     public static String formatCell(HSSFCell hssfCell){
         if(hssfCell == null){
             return "";
         }else{
             if(hssfCell.getCellType() == HSSFCell.CELL_TYPE_BOOLEAN){
                 return String.valueOf(hssfCell.getBooleanCellValue());
             }else if(hssfCell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC){
                 return String.valueOf(hssfCell.getNumericCellValue());
             }else{
                 return String.valueOf(hssfCell.getStringCellValue());
             }
         }
     } 

 }

图：