java multipartFile与File互转

MultipartFile 转 File

/***
     * 功能描述:
     * MultipartFile 转 File
     * @Author: LXD
     * @Date: 2023-03-09 10:02:26
     * @Param  multipartFile:
     * @return: java.io.File
     * @since: 1.0.0
     */
    public static File multipartFileToFile(MultipartFile multipartFile){
        // 获取文件名
        String fileName = multipartFile.getName();
        // 获取文件后缀
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        // 若需要防止临时文件重复，需要在文件名后加上UUID
        try {
            File file = File.createTempFile(fileName.substring(0,fileName.lastIndexOf("."))+ UUID.randomUUID(),suffix);
            multipartFile.transferTo(file);
            return file;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
   

File 转 MultipartFile

  /***
     * 功能描述:
     * File 转 MultipartFile 
     * @Author: LXD
     * @Date: 2023-03-09 10:06:02
     * @Param  file: 
     * @return: org.springframework.web.multipart.MultipartFile
     * @since: 1.0.0
     */
    public static MultipartFile fileToMultipartFile(File file) throws IOException {
        return new MockMultipartFile("file",file.getName(),null,new FileInputStream(file));
    }