java File转成MultipartFile

String strUrl = "C:\\Users\\Administrator\\Desktop\\json.xlsx";File multipartFile = new File(strUrl);InputStream inputStreams = new FileInputStream(multipartFile);MultipartFile file = new MockMultipartFile(multipartFile.getName(), inputStreams);

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