public  ConnectDB( final  String driverPath)  throws  IOException {
         this .driverPath = driverPath;
        Properties props =  new  Properties();
        FileInputStream in =  new  FileInputStream(driverPath);
        props.load(in);
        in.close();
        String drivers = props.getProperty("jdbc.drivers");
		 try  {
	         if  (drivers !=  null )
    	         Class .forName(drivers);
        }  catch  (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        url = props.getProperty("jdbc.url");
    }