Question

private void Update_table(){    
    try {    
        String sql= "select Firstname, Lastname,ID_number from regmembers";   
        ps = conn.prepareStatement(sql);
        rs = ps.executeQuery();
        jTable_regMembers.setModel(DbUtils.resultSetToTableModel(rs));    
        jTable_regMembers.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        jTable_regMembers.getTableHeader().setReorderingAllowed(false);
        jTable_regMembers.getTableHeader().setResizingAllowed(false); 
    } catch(Exception e){
         JOptionPane.showMessageDialog(null, e+"");
    } 
}

如何显示我的数据库注册成员的数据并将其放入jtextfield，新手问题？

Answer 1

迭代结果集对象并设置获得的值

ResultSet resultSet = ps.executeQuery();
if (resultSet.next()) {
    do {
        // perform your logic
        yourTextfield.setText(rs.getString("yourColumnName"));
    } while(resultSet.next());

Answer 2

您应该能够执行简单查询并使用结果集中的值来设置文本字段。

String sql = "Select count(*) from regmembers";
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
textfield.setText(rs.getInt(1));

希望这可以按你想要的方式工作

如何在我的数据库上使用select count

2 个答案: