文件导入

public String importKeyPointDevice(MultipartFile file) {
        //生成任务id
        String taskid = assessTaskUtilsService.getTaskid();
        try {
            Workbook workbook;
            List<TaskDevice> taskDevices = new ArrayList<>();
            Map<String, List<String>> map = new HashMap<>(10);
            //获取文件名
            String fileName = file.getOriginalFilename();
            //文件名后缀
            String postfix = fileName.substring(fileName.lastIndexOf("."));
            //获取输入流
            InputStream inputStream = file.getInputStream();
            //验证文件格式
            if (".xls".equalsIgnoreCase(postfix)) {
                workbook = new HSSFWorkbook(inputStream);
            } else if (".xlsx".equalsIgnoreCase(postfix)) {
                workbook = new XSSFWorkbook(inputStream);
            } else {
                return null;
            }
            //获取第一页表格数据
            Sheet sheet = workbook.getSheetAt(0);
            int first = sheet.getFirstRowNum();
            int last = sheet.getLastRowNum();
            Date date = new Date();
            //遍历每一行数据
            for (int i = first + 1; i <= last; i++) {
                List<String> contentList = new ArrayList<>();
                //获取行数据
                Row row = sheet.getRow(i);
                //去除空行
                if (null == row) {
                    continue;
                }
                int firstCellNum = 0;
                int lastCellNum = 5;
                for (int j = firstCellNum; j < lastCellNum; j++) {
                    //验证每行的列数据
                    if (j < 3) {
                        if (null == sheet.getRow(i).getCell(j) || "".equals(sheet.getRow(i).getCell(j).toString())) {
                            //存在未空或者null,清空contentList数据
                            contentList.clear();
                            break;
                        }
                    }
                    //添加数据
                    if (null != sheet.getRow(i).getCell(j)) {
                        contentList.add(sheet.getRow(i).getCell(j).toString());
                    } else {
                        contentList.add("");
                    }
                }
                if (CollectionUtils.isNotEmpty(contentList)) {
                    map.put("deviceInfo" + i, contentList);
                }
            }
            for (Map.Entry<String, List<String>> entry : map.entrySet()) {
                List<String> list = entry.getValue();
                TaskDevice taskDevice = new TaskDevice();
                taskDevice.setDeviceid(list.get(0));
                taskDevice.setDevicename(list.get(1));
                taskDevice.setCivilcode(list.get(2));
                taskDevice.setParentid(list.get(3));
                taskDevice.setPkeep(list.get(4));
                taskDevice.setLabel(taskid);
                taskDevice.setCtime(date);
                taskDevice.setTaskno("");
                taskDevice.setIssend(0);
                taskDevices.add(taskDevice);
            }
            detectionDao.insertTaskDevices(taskDevices);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return taskid;
    }