struts的下拉列表问题,救急!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11111

我要做的是在一个页面里有一个下拉列表,列表的内容是从数据库中取出,取出数据是在ACTION里,并装入一个ArrayList中,用request.setAttribute发送到JSP页面,但是老是显示org.apache.jasper.JasperException: Cannot find bean under name list错误,我在网上找了二天了,都没解决问题,郁闷死了,请各位大虾帮帮忙吧,代码我贴在下面:PositionSetAction.java://Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.0.0/xslt/JavaClass.xslpackage com.hrmis.struts.action;import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;import com.hrmis.dbbean.DbConn;
import com.hrmis.struts.form.PositionSetActionForm;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.util.LabelValueBean;/** 
 * MyEclipse Struts
 * Creation date: 04-12-2007
 * 
 * XDoclet definition:
 * @struts.action path="/position" name="positionSetForm" input="/positionSet.jsp" scope="request"
 */
public class PositionSetAction extends Action { // --------------------------------------------------------- Instance Variables // --------------------------------------------------------- Methods /** 
 * Method execute
 * @param mapping
 * @param form
 * @param request
 * @param response 
 * @return ActionForward
 */
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
PositionSetActionForm positionSetForm = (PositionSetActionForm) form;
DbConn conn = new DbConn();
String query = "SELECT * FROM `department`";
System.out.println(query);
ResultSet rs = conn.executeQuery(query);
ArrayList departmentList = new ArrayList();
try{
while(rs.next()){
departmentList.add(new LabelValueBean(rs.getString("departmentName"),rs.getString("departmentId")));
}
request.setAttribute("list",departmentList);
}catch(SQLException e){
System.err.println("err:"+e.getMessage());
}
// TODO Auto-generated method stub
return mapping.findForward("positionSet");
}}persitionSet.jsp:
 
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="org.apache.struts.util.LabelValueBean" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-template" prefix="template" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-nested" prefix="nested" %><html> 
<head>
<title>JSP for positionSetForm form</title>
<link href="/hrmis/style/main.css" rel="stylesheet" type="text/css">
<Script Language="JavaScript">
function departmentSet(theForm)
{
var flag = false;
if(theForm.departmentId.value == "")
{
alert("请输入部门编号!");
theForm.departmentId.focus();
return false;
}
if(theForm.departmentName.value == "")
{
alert("请输入部门名称!");
theForm.departmentName.focus();
return false;
}
}
</Script>
</head>
<body>

<h1>职业设置</h1>
<html:form action="/departmentSetAction.do" method="POST" onsubmit="return departmentSet(this)">
<P>   <TABLE border="0" width="234">
  <!--DWLayoutTable-->
<TR>
<TD width="142" height="18" align="right" valign="middle"> 部门名称:</TD>
  <TD width="132" align="left" valign="middle">
      <html:select property="departmentName">
<html:options collection="list" property="value" labelProperty="label" />
      </html:select>
</TD>
</TR>
<TR>
<TD height="18" align="right" valign="middle">职位名称:</TD>
  <TD align="left" valign="middle">
      <html:text property="positionName" value=""/> </TD>
</TR>
<TR>
<TD height="24" colspan="2" align="center" valign="middle">
    <html:submit property="submit" value="确定"/> <html:reset value="清除" />&nbsp;</TD>
</TR>
</TABLE>
</html:form>
</body>
</html>PositionSetActionForm.java://Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.0.0/xslt/JavaClass.xslpackage com.hrmis.struts.form;import java.util.ArrayList;
import java.util.Collection;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;import com.hrmis.GetDepartmentList;
import com.hrmis.departmentBean;/**
 * MyEclipse Struts Creation date: 04-12-2007
 * 
 * XDoclet definition:
 * 
 * @struts.form name="positionSetForm"
 */
public class PositionSetActionForm extends ActionForm { // --------------------------------------------------------- Instance
// Variables /** position property */
private String position; /** department property */
private String departmentName; // --------------------------------------------------------- Methods
/**
 * Method reset
 * 
 * @param mapping
 * @param request
 */
public void reset(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub
} /**
 * Returns the position.
 * 
 * @return String
 */
public String getPosition() {
return position;
} /**
 * Set the position.
 * 
 * @param position
 *            The position to set
 */
public void setPosition(String position) {
this.position = position;
} /**
 * Returns the department.
 * 
 * @return String
 */
public String getDepartmentName() {
return departmentName;
} /**
 * Set the department.
 * 
 * @param department
 *            The department to set
 */
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
}struts-config.xml:<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd"><struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="departmentSetActionForm" type="com.hrmis.struts.form.DepartmentSetActionForm" />
    <form-bean name="positionSetActionForm" type="com.hrmis.struts.form.PositionSetActionForm" />  </form-beans>  <global-exceptions />
  <global-forwards>
   <forward name="departmentSet" path="/departmentSet.jsp"/>
   <forward name="positionSet" path="/positionSet.jsp"/>
  </global-forwards>
  <action-mappings >
    <action
      attribute="departmentSetActionForm"
      name="departmentSetActionForm"
      path="/departmentSetAction"
      type="com.hrmis.struts.action.DepartmentSetAction"
      validate="false" />
    <action
      attribute="positionSetActionForm"
      name="positionSetActionForm"
      path="/positionSetAction"
      scope="request"
      type="com.hrmis.struts.action.PositionSetAction"
      validate="false" />  </action-mappings>  <message-resources parameter="com.hrmis.struts.ApplicationResources" />
</struts-config>

解决方案 »

  1.   

    你在页面导包没啊 
    看下 存了list后转发的时不时那个页面
      

  2.   

    导了啊,PositionSetAction中的是return mapping.findForward("positionSet");
    struts.xml中的是<forward name="positionSet" path="/positionSet.jsp"/>
    已经在ACTION中转发到positionSet.jsp了的
      

  3.   

    <html:select property="departmentName">
    <html:options collection="list" property="value" labelProperty="label" />
    </html:select>
    换成下面的：
    <html:select property="departmentName">
    <html:optionsCollection property="list" label="label" value="value" />
    </html:select>
    下次不要贴这么多代码了，头都大了
      

  4.   

    按楼上的这么改的话就出现另一个错误了
    javax.servlet.ServletException: No getter method for property list of bean org.apache.struts.taglib.html.BEAN
      

  5.   

    在你的formBean里面定义一个list,然后加上get和set方法.然后使用
      

  6.   

    问题已解决,我改用了session的setAttribute就没问题了,谢谢各位的帮助啦
      

  7.   

    和我贴出的是同一个问题,但是用session解决并不是一个好办法,在等待中