MultipartFile转File

public File readFiles(MultipartFile file) {
    int n;
    File newFile = new File(file.getOriginalFilename());
    try (InputStream in = file.getInputStream(); OutputStream os = new FileOutputStream(newFile)) {
         byte[] buffer = new byte[4096];
         while ((n = in.read(buffer, 0, 4096)) != -1) {
             os.write(buffer, 0, n);
         }
         System.out.println("获取文件成功，暂存目录" + newFile.getAbsolutePath());
    } catch (IOException e) {
         System.out.println("获取文件失败");
    }
    return newFile;
}