如何将数据库中的所有记录显示到JTable? [英] How to show all records in database to JTable?

问题描述

不好意思.我想显示JTable中的所有记录.但是我很困惑，因为我的编码只显示了1条记录.当我再次单击它时，它只显示相同的记录. 您能帮我如何获取所有记录吗?

Excuse me. I want to show all records in JTable. But I get confused because my coding just show 1 record. When I click it again, that just show same records. Can you help me how to get all records?

try {

            Statement stmt;
            stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT * FROM menu");

            if (rs.next()) {
                String menu_id = rs.getString("menu_id");
                String menu_type = rs.getString("menu_type");
                String menu_cat = rs.getString("menu_cat");
                String menu_name = rs.getString("menu_name");
                String menu_price = rs.getString("menu_price");

                DefaultTableModel model = (DefaultTableModel) tblMenu.getModel();
                model.addRow(new Object[]{menu_id, menu_type, menu_cat, menu_name, menu_price});
            }

        } catch (Exception e) {
            System.out.println("Failed " + e);
        }

我不知道如何编码.谢谢

I have no Idea how to code it. Thank you

推荐答案

更改

if (rs.next())

到

while (rs.next())

不仅可以运行一次代码块，而且还可以运行到ResultSet的末尾.

to run to the code block not just once, but till the end of the ResultSet.

它实际上应该看起来像这样

It should actually look like this

DefaultTableModel model = (DefaultTableModel) tblMenu.getModel();
while (rs.next()) {
    String menu_id = rs.getString("menu_id");
    String menu_type = rs.getString("menu_type");
    String menu_cat = rs.getString("menu_cat");
    String menu_name = rs.getString("menu_name");
    String menu_price = rs.getString("menu_price");

    model.addRow(new Object[]{menu_id, menu_type, menu_cat, menu_name, menu_price});
}

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