Convert excel format exception.You can try specifying the ‘excelType‘ yourself问题解决

 String fileName = files[0].getOriginalFilename();
        File dest = new File(uploadPath + fileName);
        if (!dest.getParentFile().exists()) {
            dest.getParentFile().mkdirs();
        }
        files[0].transferTo(dest);
        ExcelReader excelReader = EasyExcel.read(dest).ignoreEmptyRow(true).build();
        List<ReadSheet> readSheets = excelReader.excelExecutor().sheetList();
        List<ReadSheet> list1 = readSheets.stream().filter(u -> u.getSheetName().contains("汇总表")).collect(Collectors.toList());

        List<ErrorExcelDto> errorExcelDtoList = excelImportService.getJiaoYanByForecastList2(dest, list1, 7);

主要是将流的转换，核心代码是

   files[0].transferTo(dest);