public void login1(String username, String password) throws ClassNotFoundException, SQLException {
        // 1.注册驱动
        Class.forName("com.mysql.jdbc.Driver");
        // 2.获取连接
        Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/web08", "root", "root");
        // 3.编写sql语句
        String sql = "select * from tbl_user where uname=? and upassword=?";
        // 4.创建预处理对象
        PreparedStatement pstmt = conn.prepareStatement(sql);
        // 5.设置参数(给占位符)
        pstmt.setString(1, username);
        pstmt.setString(2, password);
        // 6.执行查询操作
        ResultSet rs = pstmt.executeQuery();
        // 7.对结果集进行处理
        if (rs.next()) {
            System.out.println("恭喜您，" + username + ",登录成功!");
            System.out.println(sql);
        } else {
            System.out.println("账号或密码错误!");
        }
        if (rs != null)
            rs.close();
        if (pstmt != null)
            pstmt.close();
        if (conn != null)
            conn.close();
    }
}