Exception creating bean of class ××Form问题，折磨我一晚上了！

<%@ page language="java" contentType="text/html; charset=GB2312"
    pageEncoding="GB2312"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html">
<title>Insert title here</title>
<style type="text/css">
<!--
body {
background-color: #cfe9ff;
}
</style>
</head>
<body><html:form action="/repairStatus/repairStatus.do">
<table width="800" height="206" border="3" cellpadding="0" cellspacing="0" bordercolor="#FFFFFF">
  <tr> 
    <th height="89" colspan="2" scope="col"><span class="style5">受理单查询</span><br></th>
  </tr>
  <tr> 
    <td height="19" colspan="2"><span class="style1"><strong>查询条件:</strong></span><br></td>
  </tr>
   <tr><td>时间起：<html:text property="timeFrom"/></td></tr>
   <tr><td>时间止：<html:text property="timeTo"/></td></tr>
    <tr><td>所在城市：<html:text property="city"/></td></tr>
  
  <tr> 
    <td colspan="2"><html:submit value="查询"/><html:reset value="重置"/><br></td>
  </tr>
  <tr> 
    <td colspan="2"><span class="style1"><strong>显示内容:</strong></span></td>
  </tr>
 </table> </html:form>
<logic:empty name="repairStatusInfo">
      暂无符合条件的记录!<br>
      
      </logic:empty>
      
      <logic:notEmpty name="repairStatusInfo">
      总受理单数：${repairStatusInfo.allAccList }<br>
      未完工数量：${repairStatusInfo.notOver }<br>
      已完工数量：${repairStatusInfo.over }<br>
      完工百分比：${repairStatusInfo.percent }<br>
      </logic:notEmpty>
 </body>
</html>