HSSFWorkbook转MultipartFile InputStream转MultipartFile

HSSFWorkbook workbook = new HSSFWorkbook();
//业务逻辑，给HSSFWorkbook添加数据
 //end
ByteArrayOutputStream bos=new ByteArrayOutputStream();
workbook.write(bos);
 
byte[] barray=bos.toByteArray();
//is第一转
InputStream is=new ByteArrayInputStream(barray);
//需要导包 
//如果是spring boot把下面的导入pom.xml
 MultipartFile multipartFile = new MockMultipartFile("文件名","文件名","文件名",is);

 <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.1.6.RELEASE</version>
        <scope>compile</scope>
 </dependency>