jsp+poi+springMVC实现导入excel数据

1 .加入依赖的包,我这里使用的是maven

<dependency>
   <groupId>org.apache.poi</groupId>
   <artifactId>poi-ooxml</artifactId>
   <version>3.9</version>
     </dependency>

2. jsp代码

3.js代码

4.开始java代码了

   @RequestMapping(value = "/admin/ajaxUpBuildLoadexcel", method = {RequestMethod.GET, RequestMethod.POST })
   public void importBuild(
           HttpServletRequest request,HttpServletResponse response,HttpSession session,
           @RequestParam(value = "managerid", defaultValue = "0") long managerid,
           @RequestParam(value = "file", required = false) MultipartFile file) //名字为表单提交过来的名字，也就是前方input=file文件的名字
                   throws Exception {
       response.setCharacterEncoding("utf-8");// 防止ajax接受到的中文信息乱码
       PrintWriter out = response.getWriter();

if(file.isEmpty()){
   out.print("文件不存在！");
   out.flush();
   out.close();
        return;
}
List<TblBuildingInfo> buildDataList = new ArrayList<TblBuildingInfo>();//自定义泛型集合，用用于添加到excel读取的类容，再批量添加到数据库
       TblBuildingInfo buildInfo = null;
       TblManagerInfo manager = null;
       int count = 0;// 楼栋导入数量
       Workbook wookbook = null;

//这里一定要转换一下file类型，不然无法读取流
       CommonsMultipartFile cFile = (CommonsMultipartFile) file;
       DiskFileItem fileItem = (DiskFileItem) cFile.getFileItem();
       InputStream inputStream = null;
       try
       {
           //获取一个绝对地址的流
           inputStream=fileItem.getInputStream();
       }
       catch(Exception e)
       {
           e.printStackTrace();
       }

       try
       {
           //2003版本的excel，用.xls结尾
           wookbook = new HSSFWorkbook(inputStream);//得到工作簿

       }
       catch (Exception ex)
       {
           try
           {
               //2007版本的excel，用.xlsx结尾
               wookbook = new XSSFWorkbook(inputStream);//得到工作簿
           } catch (IOException e)
           {
               e.printStackTrace();
           }
       }
       // 得到一个工作表
       Sheet sheet = wookbook.getSheetAt(0);
       // 获得表头
       Row rowHead = sheet.getRow(0);
       // 获得数据的总行数
       int totalRowNum = sheet.getLastRowNum();
       // 获得所有数据
       for (int i = 1; i <= totalRowNum; i++) {
           // 获得第i行对象
           Row row = sheet.getRow(i);

//这里判断每一行的列数是不是等于3
           if(row.getPhysicalNumberOfCells()!=3)//每一行得到列数
               continue;
           HSSFDataFormatter dataFormatter = new HSSFDataFormatter();//设置读取小数为整数
           // 获得获得第i行第0列的 String类型对象
           Cell cell = row.getCell((short) 0);//第一列
           if(cell.toString().trim().equals("")||cell==null)continue;//判断每一列是否为空
           buildInfo = new TblBuildingInfo();
           buildInfo.setBuildname(cell.toString());
           cell = row.getCell((short) 1);
           buildInfo.setUnitnum(Integer.parseInt(cell.toString()));
           cell = row.getCell((short) 2);
           if(cell.toString().trim().equals("")||cell==null)continue;
           buildInfo.setVid(cell.toString());

//添加到集合
           buildDataList.add(buildInfo);
       }
       if (buildDataList != null && buildDataList.size() > 0) {
           if (buildDataList.size() > 3000) {
               out.print("很抱歉，您本次导入的楼栋数是" + buildDataList.size()+ "，系统目前最大支持导入3000条数据！");
               out.flush();
               out.close();
               inputStream.close();
               return;
           }

           manager = (TblManagerInfo) baseService.findById(TblManagerInfo.class, managerid);
           if (manager != null) {
               // 批量插入数据库
               count = houseService.exportBuildData(manager,buildDataList);
           } else {
               out.print("管理员不存在！");
               out.flush();
               out.close();
               inputStream.close();
               return;
           }
       }

       buildDataList = null;
       manager = null;

       out.print("导入成功！本次共导入楼栋" + count +"栋");
       out.flush();
       out.close();
   }

5.excel模版

jsp+poi+springMVC实现导入excel数据

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