Erro conexão My SQL

package com.myapp.struts;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.LinkedList;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

public class AdminUsers {


    protected static DataSource dataSource;

    public AdminUsers() throws Exception {
        if (dataSource == null) {
            try {
               
           

                  InitialContext ic = new InitialContext();
                 // se for tomcat   ("java:comp/env/jdbc/StrutsDemoDS")mysql               
                 dataSource = (DataSource) ic.lookup("java:comp/env/jdbc/StrutsDemoDS");
                 // no JBoss faça
                 //dataSource = (DataSource) ic.lookup("java:jdbc/StrutsDemoDS");

            } catch (NamingException ex) {
                System.out.println(ex.getMessage());
                throw ex;
            }
        }
    }

    protected Connection getConnection() throws SQLException {
        Connection conn = null;
        try {
            conn = dataSource.getConnection();
        }
        catch (SQLException e) {
            throw e;
        }
        return conn;
    }


    protected void closeConnection(
        Connection conn,
        PreparedStatement stmt,
        ResultSet rs) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
            }
        }
        if (stmt != null) {
            try {
                stmt.close();
            } catch (SQLException e) {
            }
        }
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
            }
        }
    }

}

<DefaultContext>
      <Resource name="jdbc/StrutsDemoDS" auth="Container" type="javax.sql.DataSource" scope="Shareable"/>
         <ResourceParams name="jdbc/StrutsDemoDS">
         <parameter><name>factory</name><value>org.apache.commons.dbcp.BasicDataSourceFactory</value></parameter>
         <parameter><name>driverClassName</name><value>com.mysql.jdbc.Driver</value></parameter>
         <parameter><name>url</name><value>jdbc:mysql://localhost/strutsdemo</value></parameter>
         <parameter><name>username</name><value>root</value></parameter>
         <parameter><name>password</name><value>root</value></parameter>
         <parameter><name>maxActive</name><value>20</value></parameter>
         <parameter><name>maxIdle</name><value>10</value></parameter>
         <parameter><name>maxWait</name><value>100</value></parameter>
      </ResourceParams>
   </DefaultContext>