今天给大家介绍一下再java中怎么获取excel表格中的数据

前端上传文件：

<div class="tabCon">  
        <div style="text-align: center;margin-top: 20%">
        <span class="btn-upload form-group">
          <label id="error"></label>
          <input class="input-text upload-url" type="text" name="excel_file_name" readonly="">
          <a href="javascript:void();" class="btn btn-primary upload-btn"><i class="Hui-iconfont"></i> 选择Excel</a>
          <input type="file" multiple="" name="excel_file" id="excel_file" class="input-file">
        </span>
        <input style="margin-left: 10px" class="btn btn-primary" type="submit" value="&nbsp;一键导入&nbsp;" />
      </div>
</div>

js：

var formData = new FormData();
  formData.append('excel_file', $('#excel_file')[0].files[0]);
//ajax提交保存
      $.ajax({
        type : 'POST',
        url : '<%=path%>/system.mdo?method=importNetHard',
        datatype : "text",
        data : formData,
        processData : false, //必须，配合formdata 
            contentType : false,
        success : function(data) {
          if (data.statusCode==200) {//导入成功


          } else {

          }


        }
      });

java中：

@RequestMapping(params = "method=importNetHard", method = RequestMethod.POST)
   public @ResponseBody Map<String, Object> importNetHard(HttpServletRequest request) throws Exception {
      /* 返回的json数据 */
      Map<String, Object> jsonMap = new HashMap<>();

      // 1.获取参数
      MultipartHttpServletRequest fileRequest = (MultipartHttpServletRequest) request;
      MultipartFile file = fileRequest.getFile("excel_file");

      // 2. 验证
      if (file == null || file.getSize() == 0)
         return json4Map(jsonMap, null, "文件为空，导入失败！", STATUSCODE_FAILED_BADINPUT_PARAM);

      // 3.操作
      if (systemService.importExcel2DB(file))
         return json4Map(jsonMap, null, "文件已导入！", STATUSCODE_SUCCESS);

      return json4Map(jsonMap, null, "导入失败！", STATUSCODE_FAILED);
}

@Override
    public boolean importExcel2DB(MultipartFile file) throws Exception {
        // 1.取得上传目录父路径
        String baseDir = UploadUtil.class.getClassLoader().getResource("/").getPath() + "tmp/";
        // 2.重命名上传文件
        String fileName = "excel_" + DateTime.now().toString("yyyyMMddHHmmssSSS")
                + file.getOriginalFilename().replaceAll("^[\\s\\S]+(\\.\\w+)", "$1");

        // 3.建立文件路径
        File _baseDir = new File(baseDir);
        if (!_baseDir.exists() && !_baseDir.mkdir())
            return false;

        // 4.转储为文件
        File localFile = new File(baseDir + fileName);
        file.transferTo(localFile);

        return importExcel2DB4T(localFile);
   }

 @Override
    public boolean importExcel2DB4T(File file) throws Exception {
        // 1.将file文件内容转为list集合
        List<List<Object>> list = ExcelUtil.importExcel2Collection(file, 0);

        // 2.循环生成对象，并存入数据库
        Nethard nethard = new Nethard();
        int count = 0;
        int size = list.size();
        StringBuilder error = new StringBuilder("excel导入网卡到数据库时发生异常，出现重复的数据！[");
        for (int i = 1; i < size; i++) {
            List<Object> tmp = list.get(i);
            String phone = (String) tmp.get(0);
            nethard.setNhPhone(phone);
            nethard.setNhNote((String) tmp.get(1));
            nethard.setNhImsi((String) tmp.get(2));
            nethard.setNhIccid((String) tmp.get(3));
            nethard.setNhUserstate("待激活".equals(tmp.get(6)) ? 0 : 1);
            nethard.setNhWorkstate("离线".equals(tmp.get(7)) ? 0 : 1);
            nethard.setNhUsemb(Double.parseDouble((String) tmp.get(8)));
            nethard.setNhUsemsg(Integer.parseInt((String) tmp.get(9)));
            nethard.setNhCreatedate((String) tmp.get(10));
            nethard.setNhActivedate((String) tmp.get(11));
            nethard.setNhIsmsg("是".equals(tmp.get(12)) ? 1 : 0);
            nethard.setNhIsgprs("是".equals(tmp.get(13)) ? 1 : 0);

            if (nethardMapper.isExists(nethard.getNhPhone())) {
                count++;
                error.append("Phone:" + phone + ",");
                continue;
            }

            count += nethardMapper.insertSelective(nethard);
        }

        if (error.toString().indexOf("Phone") > -1) // 如果存在重复数据，打印
            logger.error(error.toString().replaceAll("([\\s\\S]+),", "$1]"));

        // 删除上传文件
        file.delete();

        return count == size - 1;
    }

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