<form action="file/upload.do" method="post" enctype="multipart/form-data">
文件:<input type="file" name="file"/><input type="submit" value="上传"/>
</form>
</body>

@Controller
//窄化
@RequestMapping("/file")
public class UploadController {@RequestMapping("/upload.do")public String upload(@RequestParam("file")CommonsMultipartFile file,HttpServletRequest req) throws Exception{String path=req.getServletContext().getRealPath("/upload");//获取文件名String fileName=file.getOriginalFilename();InputStream is = file.getInputStream();OutputStream os = new FileOutputStream(new File(path,fileName));byte[] buffer = new byte[400];int len=0;while((len=is.read(buffer))!=-1){os.write(buffer, 0, len);}os.close();is.close();return "redirect:/index.jsp";}
}

<!-- 文件上传配置 --><bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><property name="maxUploadSize" value="1000000"/></bean>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="
        http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 注解开发适配器 --><bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> <!-- 配置视图解析器 --><bean id="viewResolver"class="org.springframework.web.servlet.view.UrlBasedViewResolver"><property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/><!-- 为响应的视图名称加上前缀  --><property name="prefix" value="/WEB-INF/jsp/"/><!-- 为响应的视图名称加上后缀  --><property name="suffix" value=".jsp"/></bean><!-- 文件上传配置 --><bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><property name="maxUploadSize" value="1000000"/></bean><!-- 扫描注解类 --><context:component-scan base-package="cn.sxt.controller"/>
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"><display-name>01springmvc_helloworld</display-name><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 改变springmvc配置文件的路径及名称 --><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:mvc.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list>
</web-app>