ServletFileUpload.parseRequest()爲空

項目中上傳時ServletFileUpload.parseRequest()取值爲空原來是struts2的過濾器攔截問題

1. <filter>  
2.   <filter-name>struts2</filter-name>  
3.   <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>  
4.  </filter>  
5.  <filter-mapping>  
6.   <filter-name>struts2</filter-name>  
7.   <url-pattern>/*</url-pattern>  
8.  </filter-mapping> 

裏面的/*改爲*.action便可