Connection pooling

Sir,

In my project i want to implement connection pooling with ms-sql server 2005. i wrote the code in JSP like this...

<% Connection con=DbCon.getConnection(); Statement stmt = con.createStatement(); ResultSet rs = stmt.executeQuery("select * from userdetails"); while(rs.next()) { out.println(rs.getString("username")); }

%> <% if(con!=null) con.close(); %>

and this is my java program

package MyPackage; import java.sql.Connection; import javax.naming.Context; import javax.naming.InitialContext; import javax.sql.DataSource; public class DbConnection { public static Connection getConnection() throws Exception { return getPooledConnection(); } public static Connection getPooledConnection() throws Exception{ Connection conn = null;

    try{
      Context ctx = new InitialContext();
      if(ctx == null )
          throw new Exception("No Context");

      DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/SMSPooling");

      if (ds != null) {
         conn = ds.getConnection();
        return conn;
      }else{
          return null;
      }

    }catch(Exception e) {
        e.printStackTrace();
        throw e;
    }
}

public static void main(String[] args) { new DbConnection(); System.out.println("Database has been connected at...."+new java.util.Date()); } }

When i am executing this code i am getting the exception like the below....

java.lang.StackOverflowError

and naming not found exception...

How to solve this...

Thanks in advance..