MultipartFile 与 File 互转

/** * MultipartFile 转 File * @param file * @throws Exception */ public static void multipartFileToFile( @RequestParam MultipartFile file ) throws Exception { File toFile = null; if(file.equals("")||file.getSize()<=0){ file = null; }else { InputStream ins = null; ins = file.getInputStream(); toFile = new File(file.getOriginalFilename()); inputStreamToFile(ins, toFile); ins.close(); } } /** * File 转 MultipartFile * @param file * @throws Exception */ public static void fileToMultipartFile( File file ) throws Exception { FileInputStream fileInput = new FileInputStream(file); MultipartFile toMultipartFile = new MockMultipartFile("file",file.getName(),"text/plain", IOUtils.toByteArray(fileInput)); toMultipartFile.getInputStream(); } public static void inputStreamToFile(InputStream ins, File file) { try { OutputStream os = new FileOutputStream(file); int bytesRead = 0; byte[] buffer = new byte[8192]; while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); ins.close(); } catch (Exception e) { e.printStackTrace(); } }