Note: load the configuration file as a byte stream and get the resources in it

Load the configuration file as a byte stream , And get the resources

		// establish Properties object 
        Properties properties = new Properties();
        // Gets the class loader 
        ClassLoader loader = BaseDao.class.getClassLoader();
        // Load the resource file through the classloader as the byte input stream 
        InputStream in = loader.getResourceAsStream("db.properties");
        try {
    
            properties.load(in);
        } catch (IOException e) {
    
            e.printStackTrace();
        }
        // obtain db.properties resources 
        DRIVER = properties.getProperty("DRIVER");
        URL = properties.getProperty("URL");
        USERNAME = properties.getProperty("USERNAME");
        PASSWORD = properties.getProperty("PASSWORD");