EasyExcel读取多sheet excel异常

场景

使用Spring Boot集成EasyExcel进行导入excel多sheet，执行异常

代码

file是MultipartFile，入参，主要处理流程如下

InputStream is = file.getInputStream();
EasyExcel.read(is, SysDict.class, new SysDictReadListener(sysDictMapper, 0L)).sheet(0, "目录").doRead();List<SysDict> list = sysDictMapper.selectByDictClass1();
for (int i = 0; i < list.size(); i++) {SysDict sysDict = list.get(i);// sheet序号Integer sheetNo = i + 1;String sheetName = sysDict.getDictName();EasyExcel.read(is, SysDict.class, new SysDictReadListener(sysDictMapper, sysDict.getDictId())).sheet(sheetNo, sheetName).doRead();
}

问题描述

异常：com.alibaba.excel.exception.ExcelCommonException: Convert excel format exception.You can try specifying the ‘excelType’ yourself

按照描述，缺少excelType参数，补充后，代码大概如下：

EasyExcel.read(is, SysDict.class, new SysDictReadListener(sysDictMapper, 0L)).excelType(ExcelTypeEnum.XLSX).sheet(0, "目录").doRead();

异常：com.alibaba.excel.exception.ExcelAnalysisException: Can not create temporary file!

方案

按照上述补充excelType，并不能解决问题，经过检索，发现问题是多sheet会重复读取流对象，而一个流对象只能读取一次，重复使用，会导致上述异常，解决代码如下：

// 获取MultipartFile的流
is = file.getInputStream();// 读取第一个sheet
EasyExcel.read(..);// 读取剩余的sheet
is = file.getInputStream();
EasyExcel.read(..);