springmvc 文件上传报错org.springframework.web.util.NestedServletException

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.ClassCastException: org.apache.catalina.connector.RequestFacade

出现错误的代码位置

MultipartHttpServletRequest multipartRequest=(MultipartHttpServletRequest)request;

解决方法需要在spring配置文件中添加如下内容

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
      <property name="maxUploadSize" value="104857600"/>
        <property name="maxInMemorySize" value="4096"/>
   </bean>

使用上面代码还要确认lib中有commons-fileupload-1.2.2.jar 包否则启动时候报错

SEVERE: Exception sending context destroyed event to listener instance of class org.springframework.web.util.Log4jConfigListener java.lang.NoClassDefFoundError: org/apache/log4j/helpers/NullEnumeration     at org.apache.log4j.Category.getAllAppenders(Category.java:413)     at org.apache.log4j.Category.closeNestedAppenders(Category.java:226)     at org.apache.log4j.Hierarchy.shutdown(Hierarchy.java:467)     at org.apache.log4j.LogManager.shutdown(LogManager.java:267)