Question

无法在我的显示标记中获取bean的值..显示以下错误

  String sql;
        List<AcceptBean> list = new ArrayList<AcceptBean>();

        PreparedStatement prest = (PreparedStatement) conn.prepareStatement(occQuery);
        ResultSet rs = prest.executeQuery(occQuery);

        System.out.println(rs);
        String first = "";
        String last = "";
        String vill = "";
        String son = "";
        String dist = "";
        while (rs.next()) {

           AcceptBean bean = new AcceptBean();

           bean.setFirstName(rs.getString("FirstName"));

           bean.setLastName(rs.getString("LastName"));
           bean.setVillage(rs.getString("Village"));
           bean.setSonOf(rs.getString("SonOf"));
           bean.setDistrict(rs.getString("District"));
           list.add(bean);
}

       // list.add(objBean);
        System.out.println("list vlues in servelet" + list.get(0));
        System.out.println("list detials inserted");
        request.setAttribute("list1", list);

        ServletContext context = getServletContext();
        RequestDispatcher rd = context.getRequestDispatcher("/Report.jsp");
        System.out.println("request dispatched");
        rd.forward(request, response);

这是我的jsp代码

    <display:table name="requestScope.list1"  >
               <display:column property="firstname" title="First Name"></display:column>
                <display:column property="lastname" title="Last Name"   ></display:column>
                <display:column property="sonof" title="Father's Name"  ></display:column>
                <display:column property="district" title="District"  ></display:column>
                <display:column property="village" title="Village"  ></display:column>
            </display:table>

错误例外：[。LockupUtil]在对象类型“ColdStorage.AcceptBean”中查找属性“firstname”时出错。原因：类'ColdStorage.AcceptBean'上的未知属性'firstname'

Answer 1

当然。如果您不能在其中放置对象，那么列表的重点是什么？它应该声明并初始化为
```
List<AcceptBean> list = new ArrayList<AcceptBean> 
```
虽然。
问题在于您告诉标记在名为“list”的请求属性中查找列表，但它存储在名为“list1”的请求属性中。

就像你一样，当然你应该在wile循环中创建一个新的AcceptBean，并将它添加到while循环内的列表中。否则，您的列表中只有一个对象，包含从数据库中检索到的最后一行：

List<AcceptBean> list = new ArrayList<AcceptBean>();

PreparedStatement prest = (PreparedStatement) conn.prepareStatement(occQuery);
ResultSet rs = prest.executeQuery();
while (rs.next()) {
    AcceptBean bean = new AcceptBean();
    bean.setFirstName(rs.getString("FirstName"));
    bean.setLastName(rs.getString("LastName"));
    bean.setVillage(rs.getString("Village"));
    bean.setSonOf(rs.getString("SonOf"));
    bean.setDistrict(rs.getString("District"));
    list.add(bean);
}

request.setAttribute("list1", list);

没有。你为什么不读标签文件？它解释了如何使用它，属性是什么，并包含大量示例。
见上文。

显示标记不显示jsp中的详细信息

1 个答案: