因為在使用在線編輯器Fckeditor的上傳圖片的時候會跳出
Security error. You probably don't have enough permissions to upload. Please check your server
還有file upload error num 203
后來才知道和Struts2.0的過濾沖突了
在網絡上查找了下別人是這么說的：struts2對request進行了封裝，所以當fck的request.getinputStream的時候就會出錯.修改的方法就是對filtermapping的路徑進行修改。
然后對web.XML修改下就可以了
<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>*.action</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<welcome-file-list>