我一直在尝试将Java应用程序连接到MySQL数据库，并使用以下代码行：

import java.sql.*; 
public class AcceptValues extends HttpServlet {

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

             String url = "jdbc:mysql://localhost:3306/db_name";
             String driver = "com.mysql.jdbc.Driver";
             String userName = "root";
             String password = "";
             try {
             Class.forName(driver);
             Connection conn = DriverManager.getConnection(url,userName,password);
             out.print("Connection estd");
             Statement st = conn.createStatement();
             st.executeQuery("insert into table_name values(2, 'testing');");
             }
             conn.close();
             } catch (Exception e) {
                 out.print("Error : " +e.getMessage());
             }
        }
}

我还将类名设置为从mysql网站下载的mysql-connector-
java-5.1.29-bin.jar。但是我仍然无法使用上述代码行连接到数据库，并且将 ex。com.mysql.jdbc.Driver
抛出错误。

我是Java开发的新手，任何帮助将不胜感激。谢谢。