2018-09-11 11:11:08.235 ERROR 14352 — [nio-8080-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/fileupload/disk/DiskFileItemFactory] with root cause
java.lang.ClassNotFoundException: org.apache.commons.fileupload.disk.DiskFileItemFactory
或者：
2018-09-11 11:09:03.714 ERROR 14352 — [nio-8080-exec-6] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItem] with root cause
java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItem
解决：
此类错误为maven依赖中少包，为什么没有编译报错这个问题尚待找出
maven中贴上这个可以解决：
<
dependency
>
<
groupId
>
commons-fileupload
</
groupId
>
<
artifactId
>
commons-fileupload
</
artifactId
>
<
version
>
1.3
</
version
>
</
dependency
>