少了配置
<!-- 支持上传文件 -->
<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="1000000000"/>
</bean>
原文：http://www.cnblogs.com/taohj/p/4313711.html