@RequestMapping("/upload")
public String upload(@RequestParam("file")MultipartFile file){
    return file.getOriginalFilename();
}

@RequestMapping("/uploadBytext")
public String uploadBytext (@RequestParam("fileText")MultipartFile fileText) throws IOException {
    InputStream inputStream = fileText.getInputStream();//创建最基本的流
    //将InputStreamReader包裹在BufferedReader中以获得最佳效率。
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
    String strTmp = "";
    while((strTmp = bufferedReader.readLine())!=null){
        System.out.println(strTmp);
    }
    bufferedReader.close();
    return fileText.getOriginalFilename();
}