代碼如下:

public class OracleJdbcTest   
{   
    String driverClass = "oracle.jdbc.driver.OracleDriver";   

    Connection con;   

    public void init(FileInputStream fs) throws ClassNotFoundException, SQLException, FileNotFoundException, IOException   
    {   
        Properties props = new Properties();   
        props.load(fs);   
        String url = props.getProperty("db.url");   
        String userName = props.getProperty("db.user");   
        String password = props.getProperty("db.password");   
        Class.forName(driverClass);   

        con=DriverManager.getConnection(url, userName, password);   
    }   

    public void fetch() throws SQLException, IOException   
    {   
        PreparedStatement ps = con.prepareStatement("select SYSDATE from dual");   
        ResultSet rs = ps.executeQuery();   

        while (rs.next())   
        {   
            // do the thing you do   
        }   
        rs.close();   
        ps.close();   
    }   

    public static void main(String[] args)   
    {   
        OracleJdbcTest test = new OracleJdbcTest();   
        test.init();   
        test.fetch();   
    }   
}