public Connection conectar() {

        try {
            Class.forName("com.mysql.jdbc.Connection");
            this.conexion = (Connection) DriverManager.getConnection(this.url,this.usuario,this.password);
            if (this.conexion != null) {
                return this.conexion;
            }
        }
        catch(SQLException ex) {
            System.out.println("Hubo un problema al intentar conectarse con la base de datos "+this.url);
        }
        catch(ClassNotFoundException ex) {
            System.out.println(ex);
        }
    }