WEBIKE

Web & me,一起微笑
数据加载中……
Struts报错:Cannot find bean ××× in scope request
1、在struts做查询数据的页面时,页面报错
javax.servlet.ServletException: Cannot find bean jlist in scope request
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:867)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:800)
org.apache.jsp.version.list_jsp._jspService(list_jsp.java:143)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


2、定位问题
1)action类代码如下,且经过验证list是存在数据的
  List list = new ArrayList();
  VersionBean bean = new VersionBean();
     ServletContext app = request.getSession().getServletContext();
     String sql = (String) app.getAttribute("f_listVersion");
     try {
   list = bean.qryVersion(sql);
  } catch (SQLException e) {
   logger.error("QryVersion failed!");
   logger.error(e.getMessage());
   return mapping.findForward("fail");
  }

  request.setAttribute("jlist",list);
return mapping.findForward("success");


2)jsp显示页面,代码也正常
   <logic:present name="jlist" >
   <logic:iterate id="list" name="jlist" scope="request">
 <tr>
  <td height="46" width="82" align="center"> 
  <bean:write name="list" property="verID"/>
  </td>
  <td height="46" width="138" align="center"> 
  <bean:write name="list" property="name"/>
  </td>
  <td height="46" width="58" align="center"> 
  <bean:write name="list" property="status"/>
  </td>
  <td height="46" width="232" align="center">
  <bean:write name="list" property="description"/>
  </td>
  <td height="46" width="50" align="center">
  <input type="radio" value="<bean:write name="list" property="verID"/>" name="verID">
 </td>
 </tr>
   </logic:iterate>
   </logic:present>



3)接下来查看struts-config.xml 配置文件,发现forward redirect属性为true,当试着修改成false的时候,重启tomcat,就查询出来结果了。

    <action
      path="/version/listVersion"
      type="com.webike.action.ListVersionAction"
      scope="request">
      <forward name="success" path="/version/list.jsp" redirect="true"/>
      <forward name="fail"    path="/version/index.html" redirect="true"/>
      </action>

posted on 2008-04-27 21:08 崖客 阅读(1275) 评论(0)  编辑  收藏 所属分类: struts


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