ServletFileUpload 上传时upload.parseRequest(request);为空
今天在页面提交到servlet上传时，遇到一小问题，
<filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class></filter><filter-mapping><filter-name>struts2</filter-name> <!-- <url-pattern>/*</url-pattern> --><url-pattern>*.action</url-pattern></filter-mapping>
