在用spring mvc 做文件上传的时候出现了这个问题（能看到这篇文章就说明你已经有了那两个包了）

错误：org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'multipartResolver': Failed to introspect bean class [org.springframework.web.multipart.commons.CommonsMultipartResolver] for lookup method metadata: could not find class that it depends on; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory

大概意思是缺少这个commons-fileupload包

在pom.xml文件中加入这个包就OK了

<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.3.1</version>
</dependency>