KoneksiDB

package koneksi;

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

public class KoneksiDB {
    private Connection koneksi;
    private ResultSet rs;
    private PreparedStatement ps;

    public Connection getKoneksi() {
        if (koneksi == null) {
            try {
                Class.forName("com.mysql.jdbc.Driver");
                try {
                    String url = "jdbc:mysql://localhost:3306/coffedb";
                    koneksi = DriverManager.getConnection(url, "root", "");
                    System.out.println("YEY, Koneksi Sukses");
                } catch (SQLException se) {
                    System.out.println("YAHH, Koneksi Gagal" + se);
                    System.exit(0);
                }
            } catch (ClassNotFoundException cnfe) {
                System.out.println("Maaf, Class tidak ditemukan !" + cnfe);
                System.exit(0);
            }
        }
        return koneksi;
    }

    public ResultSet getRs() {
        return rs;
    }

    public boolean eksekusiQuery(String query, boolean baris) {
        try {
            ps = koneksi.prepareStatement(query);
            if (baris) {
                rs = ps.executeQuery();
            } else {
                ps.executeUpdate();
            }
            return true;
        } catch (SQLException e) {
            return false;
        }
    }

    public static void main(String[] coba) {
        new KoneksiDB().getKoneksi();
    }
}