File is not a normal file.

问题：MultipartFile 转File 提示 File is not a normal file.

CommonsMultipartFile cf = (CommonsMultipartFile)multfile;   
DiskFileItem fi = (DiskFileItem) cf.getFileItem();  
File file = fi.getStoreLocation();

处理：

File file = File.createTempFile("temp", null);
(file);
file.deleteOnExit();