spring上传

注册并上传页面
    <form action="upload" method="post"   enctype="multipart/form-data">
        账户：<input type="text" name="username"/><br/>
        密码：<input type="password" name="pwd"/><br/>
        文件：<input type="file" name="mf"/><br/>
        <input type="submit" value="注册"/>
    </form>

//3.上传案例
  @RequestMapping("/upload")
  public String register(User u,Model model,
    @RequestParam("mf") MultipartFile mf){  
    System.out.println("name="+u.getUsername()+ ",pwd="+u.getPwd());
    model.addAttribute("msg", "注册成功");
    userList.add(u);
    try {                     FileUtils.copyInputStreamToFile(
        mf.getInputStream(), 
        new File("E:/"+mf.getOriginalFilename()));
    } catch (IOException e) {
      e.printStackTrace();
    }   
    System.out.println(mf.getOriginalFilename()+
                ","+mf.getSize());
    return "login";
  }

<bean id="multipartResolver"
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

    <!-- one of the properties available; the maximum file size in bytes -->
    <property name="maxUploadSize" value="10000000"/>