excel文件导入或导出Java代码示例

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 sheetIterator = work.sheetIterator();
        while (sheetIterator.hasNext()) {
            Sheet sheet = sheetIterator.next();
            if (sheet == null) {
                return;
            }
            //先获取首列标题
            Map validColumns = new HashMap<>();
            List 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 map = new HashMap();
            //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