1在 DefaultServlet-servlet.xml 添加bean

<!--文件上傳-->
<bean id="multipartResolver"
      class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

    <property name="defaultEncoding" value="UTF-8"/>
    <property name="maxUploadSize" value="10000000"/>

</bean>
2添加jar 包

<!-- 文件上傳所依賴的jar包 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>

spring mvc 文件上傳