Required MultipartFile parameter 'uploadFiles' is not present

uploadify Required MultipartFile parameter ‘uploadFiles’ is not present

<!-- 配置中央控制器 -->
<servlet>
<servlet-name>dispatch</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<multipart-config>
<max-file-size>512000000</max-file-size>
</multipart-config>
</servlet>

<bean id="multipartResolver"class="org.springframework.web.multipart.support.StandardServletMultipartResolver">
</bean>