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package serverapp;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 *
 * @author admin
 */
public class TovarService {

    // select naim, sum(kol) from test.tovar group by naim order by naim
    //
    private static Connection getConn() throws SQLException {
        //
        String connectionString = "jdbc:mariadb://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&user=root&password=";
        final Connection connection = DriverManager.getConnection(connectionString);
        return connection;
    }
    // метод для получения данных из таблицы tovar
    public TovarItem[] getItems() {
        // получаем соединение с помощью метода getConn()
        try (Connection c = getConn();
             PreparedStatement s = c.prepareStatement("select naim, sum(kol) from test.tovar group by naim order by naim");
             ResultSet rs = s.executeQuery();) {
            while (rs.next()) {
                int tovarId = rs.getInt(1);
                int kol = rs.getInt(2);
                System.out.println("tovarId=" + tovarId);
                System.out.println("kol=" + kol);
            }
        } catch (Exception exc) {
            exc.printStackTrace();
        }
        return null;
    }
}