Question

我正在尝试从mysql表单中读取数据特定的表调用菜单此表包含四行我只需要读取4行，如项目名称，价格，类型，类别，以在控制台中以字符串形式打印像表格视图

我尝试创建一个方法，但是我失败了，就像这个方法

public static void getMenuItems(String tableName) {
    try {
        setConnection();
        Statement stmt = con.createStatement();
        ResultSet rs;

        String strSelect = "select from " + tableName;
        rs = stmt.executeQuery(strSelect);
        // make the selection at the last row
        rs.last();
        int c = rs.getRow();
        rs.beforeFirst();

        String values[] = new String[c];

        while (rs.next()) {
            int i = 0;
            values[i] = rs.getString(1);
            i++;
        }
        con.close();
        System.out.println(values);
    } catch (SQLException e) {
        Tools.msgBox(e.getMessage());
    }

这是我的Menu.Class

public class Menu implements mainData{
    private int Menu_Id;
    private String Name;
    private float Price;
    private String Type;
    private String Category;

    public int getMenu_Id() {
        return Menu_Id;
    }

    public void setMenu_Id(int Menu_Id) {
        this.Menu_Id = Menu_Id;
    }

    public String getName() {
        return Name;
    }

    public void setName(String Name) {
        this.Name = Name;
    }

    public float getPrice() {
        return Price;
    }

    public void setPrice(float Price) {
        this.Price = Price;
    }

    public String getType() {
        return Type;
    }

    public void setType(String Type) {
        this.Type = Type;
    }

    public String getCategory() {
        return Category;
    }

    public void setCategory(String Category) {
        this.Category = Category;
    }
           //have here some method
.....................................
//Here is a method called getCustomRows
    @Override
    public void getCustomRows(String statement, JTable table) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

Answer 1

您有多个列，而不仅仅是一个字符串。（至少，如果你在查询中SELECT * FROM）

制作Menu values[] = new Menu[c];

在循环中分配

 for (int i = 0; rs.next(); i++) {
        Menu m = new Menu();
        // m.setName(rs.getString(1));
        values[i] = m;
 }

如何创建一个方法，从控制台的mysql表中提供数据？

1 个答案: