No action instance for path ...could be created.怎么解决？

Question

我用的ssh框架，action继承的是LookupDispatchAction，form用的是LazyValidatorForm，
在做文件上传时遇到了这个错误，已经调了一上午了，未果，来向各位讨教一下HTTP Status 500 ： No action instance for path /addManager could be created。
                   The server encountered an internal error (No action instance for path /addManager could 
                   be created) that prevented it from fulfilling this request。theme_add.jsp主要代码：<html:form action="addManager.do" method="post" enctype="multipart/form-data" >
  <table align="center" border="1" width="80%" height="80%">
    <tr>
      <td align="center">上传附件：</td>
      <td><html:file property="theFile"/></td>
      <td align="center">
<html:submit property="method">
  <bean:message key="theme.up"  />
 </html:submit>

      </td>
    </tr>
    <tr>
      <td align="center" colspan="3">
<html:submit property="method">
  <bean:message key="theme.submit"/>
</html:submit><br>
      </td>
    </tr>
  </table>
</html:form>struts-config.xml:<form-bean name="themeForm" type="org.apache.struts.validator.LazyValidatorForm"/>
 <action input="/bbs/portal/theme_add.jsp"
     name="themeForm"
     path="/addManager" 
     parameter="method"
     type="cn.dawning.bbs.web.portal.action.AddManagerAction" >
     <forward name="themeAdd" path="/bbs/portal/theme_add.jsp"/>
    </action>

AddManagerAction.java:package cn.dawning.bbs.web.portal.action;
public class AddManagerAction extends BaseLookupDispatchAction {
  public ActionForward themeUp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws   
                           FileNotFoundException, IOException {

User user = (User)request.getSession().getAttribute("user");

LazyValidatorForm themeForm = (LazyValidatorForm)form;
FormFile file = (FormFile)themeForm.get("theFile");
String contentType = file.getContentType();
String fileName = file.getFileName();
int fileSize = file.getFileSize();
byte[] fileData=file.getFileData();

Date date=new Date();
DateFormat dateFormat=DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM);
String time=dateFormat.format(date);

Attachment attach = new Attachment();
attach.setContentType(contentType);
attach.setFileName(fileName);
attach.setFileSize(fileSize);
attach.setSubmitTime(time);
attach.setUser(user);

String dir=request.getSession().getServletContext().getRealPath("attachment")+File.separator;
FileOutputStream out = new FileOutputStream(new File(dir+fileName));

out.write(fileData);
out.close();

request.getSession().setAttribute("attach", attach);
ActionForward af = mapping.findForward("themeAdd");

return af;
  }

  protected Map<String,String> getKeyMethodMap(){
Map<String,String> map = new HashMap<String,String>();
map.put("theme.up","themeUp");

return map;
  }

}ApplicationResources.properties:theme.up=上传
theme.submit=提交

Answer 1

<html:form action="addManager.do?method=themeUp" method="post" enctype="multipart/form-data" >