struts上床文件的问题
我想用struts写一个上传文件的页面，出现如下错误，

type   Exception   report

message  

description   The   server   encountered   an   internal   error   ()   that   prevented   it   from   fulfilling   this   request.

exception  

org.apache.jasper.JasperException:   Exception   in   JSP:   /index.jsp:14

11:   <p/> UserName: <html:text   property= "userName "/>
12:   <p/> Password: <html:password   property= "password "/>
13:  
14:   <html:file   property= "allanFile "     errorStyle= "background-color:   yellow "   />
15:   <p/> <html:submit/>
16:   </html:form>
17:   </body>


Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:506)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root   cause  

javax.servlet.ServletException:   No   getter   method   for   property:   "allanFile "   of   bean:   "UploadFileForm "
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:843)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:776)
org.apache.jsp.index_jsp._jspService(index_jsp.java:85)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root   cause  

javax.servlet.jsp.JspException:   No   getter   method   for   property:   "allanFile "   of   bean:   "UploadFileForm "
org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:903)
org.apache.struts.taglib.html.BaseFieldTag.prepareValue(BaseFieldTag.java:120)
org.apache.struts.taglib.html.BaseFieldTag.renderInputElement(BaseFieldTag.java:99)
org.apache.struts.taglib.html.BaseFieldTag.doStartTag(BaseFieldTag.java:77)
org.apache.jsp.index_jsp._jspx_meth_html_file_0(index_jsp.java:183)
org.apache.jsp.index_jsp._jspx_meth_html_form_0(index_jsp.java:116)
org.apache.jsp.index_jsp._jspService(index_jsp.java:75)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)