JDBCUtils工具类配置文件的读取方式

//第一种方式

Properties prop= new Properties();
        //读取文件   通过类加载读取
        InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("data.properties");
        prop.load(is);
        String driverClass = prop.getProperty("driverClass");
        String url = prop.getProperty("url");

String username = prop.getProperty("username");

String password = prop.getProperty("password");

//第二种方式

Properties properties = new Properties();

// 读取属性文件：使用Java中Properties的对象.

InputStream is = new FileInputStream("src/jdbc.properties");

properties = new Properties();

properties.load(is);

String driverClass = properties.getProperty("driverClass");

String url = properties.getProperty("url");

String username = properties.getProperty("username");
        String password = properties.getProperty("password");