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>

控制器代码如下：

 

//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";
	}

spring-mvc配置文件，增加如下代码：

 

 

<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"/>