jsp mysql connection error

the following code taken from net but it was not working. why? any one help me and also one question how to configure the port no 3306

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>

<html>
<head>
<title>Connection with mysql database</title>
</head>
<body>
<h1>Connection status</h1>
<%
try {
/* Create string of connection url within specified format with machine name, port number and database name. Here machine name id localhost and database name is usermaster. jdbc:mysql 3306*/
//String connectionURL = "jdbc:mysql://localhost:3306/reg";

//using odbc regdsn already created
String connectionURL = "jdbc:odbc:regdsn";

// declare a connection by using Connection interface
Connection connection = null;

// Load JBBC driver "com.mysql.jdbc.Driver"
//Class.forName("com.mysql.jdbc.Driver").newInstance();
//Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();

/* Create a connection by using getConnection() method that takes parameters of string type connection url, user name and password to connect to database. */
connection = DriverManager.getConnection(connectionURL,"root", "root");

// check weather connection is established or not by isClosed() method
if(!connection.isClosed())
%>
<font size="+3" color="green"></b>
<%
out.println("Successfully connected to " + "MySQL server using TCP/IP...");
connection.close();
}
catch(Exception ex){
%>
</font>
<font size="+3" color="red"></b>
<%
out.println("Unable to connect to database.");
}
%>
</font>
</body>
</html>

the following code taken from net but it was not working. why? any one help me and also one question how to configure the port no 3306
i tryed with

Class.forName("com.mysql.jdbc.Driver").newInstance();
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
these drivers but its not wotking
can you help me

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>

<html>
<head>
<title>Connection with mysql database</title>
</head>
<body>
<h1>Connection status</h1>
<%
try {
/* Create string of connection url within specified format with machine name, port number and database name. Here machine name id localhost and database name is usermaster. jdbc:mysql 3306*/
//String connectionURL = "jdbc:mysql://localhost:3306/reg";

//using odbc regdsn already created
String connectionURL = "jdbc:odbc:regdsn";

// declare a connection by using Connection interface
Connection connection = null;

// Load JBBC driver "com.mysql.jdbc.Driver"
//Class.forName("com.mysql.jdbc.Driver").newInstance();
//Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();

/* Create a connection by using getConnection() method that takes parameters of string type connection url, user name and password to connect to database. */
connection = DriverManager.getConnection(connectionURL,"root", "root");

// check weather connection is established or not by isClosed() method
if(!connection.isClosed())
%>
<font size="+3" color="green"></b>
<%
out.println("Successfully connected to " + "MySQL server using TCP/IP...");
connection.close();
}
catch(Exception ex){
%>
</font>
<font size="+3" color="red"></b>
<%
out.println("Unable to connect to database.");
}
%>
</font>
</body>
</html>

First of all , scriptlet in jsp is discourage. and Coming to your problem , what you took from net [sample code ]is wrong .please download the mysql driver from here and follow the manual

Hope this helps

to work the above code you need to make a Data Source Name(DSN) as this link explains
click here to create a DSN

to make use of this code you need to use a connector jar...download mysql connector

This has nothing to do with JSP, so moving to the JDBC forum.