Java如何将MultipartFile与File格式互转

将MultipartFile转为File：

MultipartFile multipartFile = ...;
File file = new File(multipartFile.getOriginalFilename());
multipartFile.transferTo(file);

将File转为MultipartFile：

File file = ...;
FileInputStream input = new FileInputStream(file);
MultipartFile multipartFile = new MockMultipartFile("file", file.getName(), "text/plain", IOUtils.toByteArray(input));