1、excel文件导入
controller层接口内容
service层代码
serviceImpl内代码内容
@Override@Transactional(rollbackFor = Exception.class)public void importCheckItemExcel(MultipartFile file, Long checkPkgId) throws Exception {if (file.isEmpty()){throw new IOException("请选择上传文件");}Workbook work = this.getWorkbook(file);if (null == work) {throw new HolliException(DeviceExceptionEnum.EXCEL_IS_NULL_EXCEPTION);}Iterator<Sheet> sheetIterator = work.sheetIterator();while (sheetIterator.hasNext()) {Sheet sheet = sheetIterator.next();if (sheet == null) {return;}//先获取首列标题Map<String, Integer> validColumns = new HashMap<>();List<String> headerCells = getFirstRow(sheet, 0);if (headerCells == null) {return;}for (int i = 0; i < headerCells.size(); i++) {Object header = headerCells.get(i);if (header == null) {continue;}if (ObjectUtil.contains(header, "修程")) {
// validColumns.put("checkLevel", i);//数字validColumns.put("checkLevelName", i);//含义}else if (ObjectUtil.contains(header, "工作项目")) {validColumns.put("checkName", i);}else if (ObjectUtil.contains(header, "单位")) {
// validColumns.put("checkUnit", i);//数字validColumns.put("checkUnitName", i);//含义}else if (ObjectUtil.contains(header, "周期")) {validColumns.put("checkCycle", i);}else if (ObjectUtil.contains(header, "工作内容及标准")) {validColumns.put("checkContent", i);}else if (ObjectUtil.contains(header, "ATP型号")) {validColumns.put("atpModel", i);}}
//标题集合if (validColumns.size() == 0) {return;}Map<String, Object> map = new HashMap<String, Object>();//遍历当前sheet中的所有行//包涵头部，所以要小于等于最后一列数,这里也可以在初始值加上头部行数，以便跳过头部for (int j = 1; j <= sheet.getLastRowNum(); j++) {//读取一行List<Object> rows = getRow(sheet, j);if (rows == null) {continue;}Set<String> keySet = validColumns.keySet();for (String key : keySet) {int col_index = validColumns.get(key);if (col_index >= rows.size()) {continue;}Object cell = rows.get(col_index);map.put(key, cell);}
//取出对应属性及值内容 以便存储数据库//业务逻辑，数据存储DevCheckItemVo devCheckItemVo = new DevCheckItemVo();BeanUtil.copyProperties(map, devCheckItemVo);this.insertDevCheckItem(checkPkgId, devCheckItemVo, j + 1);}}}判断excel的格式，同时兼容2003和2007
protected final static String excel2003L = ".xls"; //2003- 版本的excelprotected final static String excel2007U = ".xlsx"; //2007+ 版本的excel/*** 描述：根据文件后缀，自适应上传文件的版本*/public static Workbook getWorkbook(MultipartFile file) throws Exception {Workbook wb = null;InputStream is = file.getInputStream();String fileType = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));if (excel2003L.equals(fileType)) {wb = new XSSFWorkbook(is); //2007+
// 因HSSFWorkbook报（You need to call a different part of POI to process this data (eg XSSF instead of HSSF)），故直接使用XSSFWorkbook处理
// wb = new HSSFWorkbook(is); //2003-} else if (excel2007U.equals(fileType)) {wb = new XSSFWorkbook(is); //2007+} else {throw new IOException("解析的文件格式有误！");}return wb;}获取行数据
/*** 获取行数据* @param sheet* @param rowIndex* @return*/public List<Object> getRow(Sheet sheet, int rowIndex) {List<Object> li = new ArrayList<Object>();if (sheet == null) {return null;}Row row = null;Cell cell = null;//读取一行row = sheet.getRow(rowIndex);//去掉空行和表头if (row == null) {return null;}/**为去掉空行，若第一列为空，则直接跳过该行*/if (ObjectUtil.isEmpty(row.getCell(0))) {return null;}//遍历所有的列for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {cell = row.getCell(y);li.add(this.getCellFormatValue(cell));}return li;}//获取excel列表内的对应数据格式
//获取excel列表内的对应数据格式protected Object getCellFormatValue(Cell cell) {Object val = "";if (null != cell) {if (cell.getCellType() == CellType.NUMERIC || cell.getCellType() == CellType.FORMULA){val = cell.getNumericCellValue();if (DateUtil.isCellDateFormatted(cell)){val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换}else{if ((Double) val % 1 != 0){val = new BigDecimal(val.toString());}else{val = new DecimalFormat("0").format(val);}}}else if (cell.getCellType() == CellType.STRING){val = cell.getStringCellValue();}else if (cell.getCellType() == CellType.BOOLEAN){val = cell.getBooleanCellValue();}else if (cell.getCellType() == CellType.ERROR){val = cell.getErrorCellValue();}} else {val = "";}return val;}
2、excel导出
controller层接口内容
service层代码
serviceImpl内代码内容
@Overridepublic void exportCheckItemExcel(String strIds, HttpServletResponse response) throws Exception {List<DevCheckItem> devCheckItemList = new ArrayList<>();long[] itemIdArray = StrUtil.splitToLong(strIds,",");//查询检修项idfor (int i = 0; i< itemIdArray.length; i++){DevCheckItem devCheckItem = this.getById(itemIdArray[i]);if (ObjectUtil.isNotEmpty(devCheckItem)){devCheckItemList.add(devCheckItem);}}if (ObjectUtil.isNotEmpty(devCheckItemList) && devCheckItemList.size() > 0){//导出excelXSSFWorkbook workbook=new XSSFWorkbook();//获得名字为sheet的工作本对象，这个是看你的模板工作表的名字XSSFSheet sheet = workbook.createSheet("sheet1");// 序号int serialNo = 1;//行号int rowIndex = 1;//创建表头XSSFRow row_excel = sheet.createRow(0);//行业务数据填充XSSFCell cell = row_excel.createCell(0);cell.setCellValue("序号");cell = row_excel.createCell(1);cell.setCellValue("ATP型号");cell = row_excel.createCell(2);cell.setCellValue("修程");cell = row_excel.createCell(3);cell.setCellValue("工作项目");cell = row_excel.createCell(4);cell.setCellValue("单位");cell = row_excel.createCell(5);cell.setCellValue("周期（小时）");cell = row_excel.createCell(6);cell.setCellValue("工作内容及标准");//遍历填充数据for (DevCheckItem devCheckItem : devCheckItemList){//获取当前行row_excel = sheet.getRow(rowIndex);if (row_excel == null){//创建行row_excel = sheet.createRow(rowIndex);}//内容填充if (ObjectUtil.isNotEmpty(devCheckItem)){XSSFCell cellNew = row_excel.createCell(0);cellNew.setCellValue(serialNo);cell = row_excel.createCell(1);if (ObjectUtil.isNotEmpty(devCheckItem.getAtpModel())){cell.setCellValue(devCheckItem.getAtpModel());}cell = row_excel.createCell(2);if (ObjectUtil.isNotEmpty(devCheckItem.getCheckLevel())){String levelName = DevCheckLevelEnum.getLevelNameByType(devCheckItem.getCheckLevel());cell.setCellValue(levelName);}cell = row_excel.createCell(3);if (ObjectUtil.isNotEmpty(devCheckItem.getCheckName())){cell.setCellValue(devCheckItem.getCheckName());}cell = row_excel.createCell(4);if (ObjectUtil.isNotEmpty(devCheckItem.getCheckUnit())){String checkUnit = this.getCheckUnitNameByNum(devCheckItem.getCheckUnit());cell.setCellValue(checkUnit);}cell = row_excel.createCell(5);if (ObjectUtil.isNotEmpty(devCheckItem.getCheckCycle())){cell.setCellValue(devCheckItem.getCheckCycle());}cell = row_excel.createCell(6);if (ObjectUtil.isNotEmpty(devCheckItem.getCheckContent())){cell.setCellValue(devCheckItem.getCheckContent());}}serialNo++;rowIndex++;}response.setCharacterEncoding("UTF-8");response.setHeader("Content-Type", "application/vnd.ms-excel");ServletOutputStream out = response.getOutputStream();workbook.write(out);}}以上已导出完成。
3、以下为可能会用到的导出实例文件，上传文件服务器的过程
File格式转换MultipartFile格式的例子
//上传minio服务器
String fileName = "检修工作项目.xlsx";
File cacheFile = new File(fileName);
if (cacheFile.exists()) {cacheFile.delete();
}cacheFile.createNewFile();//生成文件
OutputStream out = new FileOutputStream(cacheFile);
workbook.write(out);
---------------------------------------------------------------------------------------（上面为导出实例文件）
//下面为上传文件流格式转换的格式。
FileInputStream fileInputStream = new FileInputStream(cacheFile);
MultipartFile multipartFile = new MockMultipartFile("cacheFile", cacheFile.getName(), "text/plain", IOUtils.toByteArray(fileInputStream));
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注:仅供学习，记录问题和参考，共勉！
