Question

当我尝试检索整个记录并从数据库中显示它时。它显示错误

java.sql.SQLException: Column Index out of range, 8 > 6.

我无法弄清楚这一点。请帮助。

JAVA CODE

public ArrayList viewAllDrivers() {
        ArrayList allDrivers=new ArrayList();

        try {
            String sql= "select * from adddriver ORDER BY dname";
            rs =DBConnection.executeQuery(sql);
            while(rs.next()) {
                ArrayList one = new ArrayList();
                one.add(rs.getInt(1));
                one.add(rs.getString(2));
                one.add(rs.getString(6));
                one.add(rs.getString(8));
                one.add(rs.getString(9));
                one.add(rs.getString(10));
                one.add(rs.getInt(11));
                allDrivers.add(one);
            }

        }
        catch (Exception ex) {
            System.out.println (ex);
        }
        return allDrivers;
    }

PAGE我正在尝试显示结果

<%
SearchDAO searchDAO = new SearchDAO();
ArrayList all = searchDAO.viewAllDrivers();
int size = all.size();
%>


<table width="95%" align="center"  style="border:#D22929 solid 2px;padding:10px;" border="0">
  <tr>
    <th bgcolor="#D22929" scope="col"><span class="style10">Driver Name </span></th>
    <th bgcolor="#D22929" scope="col"><span class="style10">Address</span></th>
    <th bgcolor="#D22929" scope="col"><span class="style10">City</span></th>
    <th bgcolor="#D22929" scope="col"><span class="style10">Contact</span></th>
    <th bgcolor="#D22929" scope="col"><span class="style10">Country&nbsp;&nbsp;</span></th>
    <th bgcolor="#D22929" scope="col"><span class="style10">Ation</span></th>
  </tr>

<%
for(int i=0;i<size;i++){
ArrayList one=(ArrayList)all.get(i);
%>
<tr style="height:30px; padding:4px;">
    <td><div align="center"><%=(String)one.get(1)%></div></td>
    <td><div align="center"><%=(String)one.get(2)%></div></td>
    <td><div align="center"><%=(String)one.get(3)%></div></td>
    <td><div align="center"><%=(String)one.get(4)%>&nbsp;</div></td>
    <td><div align="center"><%=(String)one.get(5)%>&nbsp;</div></td>

</tr>
<% } %>

Answer 1

此错误表示您的adddriver只有6列，因此8是无效的列索引。

这意味着所有这些语句都有无效索引：

            one.add(rs.getString(8));
            one.add(rs.getString(9));
            one.add(rs.getString(10));
            one.add(rs.getInt(11));

也许你的数据库表并不包含你的想法。

Answer 2

总是更好地明确命名您要检索的列，这样您就不会遇到这样的问题。

public ArrayList viewAllDrivers（）{ ArrayList allDrivers = new ArrayList（）;

    try {
        String sql= "select city,address,... from adddriver ORDER BY dname";
        rs =DBConnection.executeQuery(sql);
        while(rs.next()) {
            ArrayList one = new ArrayList();
            one.add(rs.getInt(1));
            one.add(rs.getString(2));
            one.add(rs.getString(6));
            one.add(rs.getString(8));
            one.add(rs.getString(9));
            one.add(rs.getString(10));
            one.add(rs.getInt(11));
            allDrivers.add(one);
        }

    }
    catch (Exception ex) {
        System.out.println (ex);
    }
    return allDrivers;
}

由于您遇到此异常

，因此您的列数已经过时了

java.sql.SQLException：列索引超出范围，8＆gt; 6

2 个答案: