@shiyu6226
```
@RequestMapping(
value = "url", method = RequestMethod.POST
)
public void uploadFile(
@RequestParam("file") MultipartFile file
) throws IOException {

InputStream input = upfile.getInputStream();
Path path = Paths.get(path);//check path
OutputStream output = Files.newOutputStream(path);
IOUtils.copy(in, out);
//org.apache.commons.io.IOUtils or you can create IOUtils.copy

}
```

You should close your stream after whole data is written.