Problemas com Hibernate

Olá amigos,

Meu nome é Anderson Martins, e estou querendo fazer um sisteminha pra treinar Java e aprender mais coisas, como por ex:. frameworks Hibernate, Struts e Spring.
O que to montando me baseando em alguns exercícios e exemplos de sala de aula, é um sistema para Bolão seja ele de qualquer campeonato, onde o administrador poderá cadastrar os apostadores, os jogos e as apostas dos apostadores, saindo depois um relatório pelo IReport de classificação e comparação dos resultados oficiais e as apostas dos jogadores, e assim atribuidos seus devidos pontos.

me encontro numa situação de erro de conexão com MySql eu acho, mas não sei qual o erro certo gostaria de uma ajuda.

colocarei aqui os códigos que criei, e por último o erro, se puder me ajudar ficaria muito grato e no que eu puder ajudar, pode pedir.

CadastroAposta.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<jsp:useBean id="objAposta" class="Entidades.Aposta" scope="page" />
<jsp:useBean id="objDAO" class="DAO.ApostaDAO" scope="page" />
<jsp:setProperty name="objAposta" property="*" />
<%
//Unidade de trabalho (INSERE)
objDAO.beginHibernate();
objDAO.insertAposta(objAposta);
objDAO.commitTransaction();
objDAO.closeSession();
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Cadastro Apostas</title>
<link rel="stylesheet" type="text/css" href="estilosbolao.css">
</head>
<body>
<p> </p>
<table width="100%">
<tr>
<td>
<table width="930px" align="center">
<tr>
<td colspan="4"><h1 align="center">CADASTRO APOSTAS</h1></td>
</tr>
<tr>
<td colspan="4">
<form name="form1" method="post" action="">
<table width="585" align="center">
<tr id="marcadorgolpts">
<td width="120">Identificação do Jogo</td>
<td width="120">Time 1</td>
<td width="12"> </td>
<td width="11"> </td>
<td width="12"> </td>
<td width="120">Time 2</td>
<td width="144">Pontos</td>
</tr>
<tr>
<td> </td>
<td> </td>
<td><label><input name="goltime1" type="text" id="goltime1" size="2"></label></td>
<td>x</td>
<td><label><input name="goltime2" type="text" id="goltime2" size="2"></label></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td colspan="7" align="center"><label>
<input type="submit" name="Cadastrar" id="Cadastrar" value="Cadastrar">
</label></td>
</tr>
</table>
</form>
</td>
</tr>
</table>
</table>
</body>
</html>

Aposta.java

package Entidades;

import java.io.Serializable;
import javax.persistence.*;

@Entity
@Table(name="aposta")
public class Aposta implements Serializable{
@Id
@GeneratedValue
@Column(name="idaposta")
private int aposta;
@Column(name="goltime1")
private int gl1;
@Column(name="goltime2")
private int gl2;

public int getGl1() { return gl1;}
public int getAposta() { return aposta; }
public int getGl2() { return gl2; }

public void setAposta(int aposta) { this.aposta = aposta; }
public void setGl1(int gl1) { this.gl1 = gl1; }
public void setGl2(int gl2) { this.gl2 = gl2; }
}

ApostaDAO.java

package DAO;

import Entidades.Aposta;
import org.hibernate.*;
import java.util.List;

public class ApostaDAO {

private Session session = null;
private Transaction transaction = null;

public void insertAposta(Aposta obj) {
Integer id = (Integer)session.save(obj);
obj.setAposta(id); //o Id de Aposta Ã© matr
}

public void updateAposta(Aposta obj) {
session.update(obj);
}

public void deleteAposta(Aposta obj) {
session.delete(obj);
}

public Aposta loadAposta(int matr) {
Aposta obj = (Aposta) session.load(Aposta.class, matr);
return obj;
}

@SuppressWarnings("unchecked") //warning query.list()
public List<Aposta> listAllApostas() {
Query query = session.createQuery("from Aposta");
List<Aposta> Apostas = query.list();
return Apostas;
}

@SuppressWarnings("unchecked") //warning query.list()
public List<Aposta> buscaApostas(String n) {
Query query = session.createQuery("from Aposta as p " +
"where p.nome like \'%"+n+"%\'");
List<Aposta> Apostas = query.list();
return Apostas;
}
//////////////////////////////////////////////////////////////////
//begin
public void beginHibernate() {
try
{ session = HibernateUtil.getSession();
transaction = session.beginTransaction();
} catch (HibernateException e) {
System.out.println("\nErro Begin Hibernate.\n\n");
e.printStackTrace();
}
}
//commit
public void commitTransaction() {
try {
transaction.commit();
} catch (HibernateException e) {
System.out.println("\nError Commit Transaction.\n\n");
e.printStackTrace();
}
}
//close
public void closeSession() {
try {
session.close();
} catch (HibernateException e) {
System.out.println("\nError Close Session.\n\n");
e.printStackTrace();
}
}
}

HibernateUtil.java

package DAO;

import org.hibernate.*;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;

public class HibernateUtil {
private static final SessionFactory sessionFactory;

static {
try {
// Create the SessionFactory from standard (hibernate.cfg.xml)
// config file.
sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
} catch (Throwable ex) {
// Log the exception.
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}

public static SessionFactory getSessionFactory() {
return sessionFactory;
}

public static Session getSession(){
return getSessionFactory().openSession();
}
}

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/bd_bolao2010</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<mapping resource="DAO/hibernate.hbm.xml"/>
<mapping resource="DAO/hibernate.hbm.xml"/>
<mapping resource="DAO/hibernate.hbm.xml"/>
<mapping resource="DAO/hibernate.hbm.xml"/>
<mapping resource="Entidades/hibernate.hbm.xml"/>
<mapping resource="Entidades/hibernate.hbm.xml"/>
<mapping resource="DAO/hibernate.hbm.xml"/>
</session-factory>
</hibernate-configuration>

ERRO
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.ExceptionInInitializerError
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)

javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

root cause

javax.servlet.ServletException: java.lang.ExceptionInInitializerError

org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:862)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
org.apache.jsp.CadastroAposta_jsp._jspService(CadastroAposta_jsp.java:145)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

root cause

java.lang.ExceptionInInitializerError
DAO.HibernateUtil.(HibernateUtil.java:28)
DAO.ApostaDAO.beginHibernate(ApostaDAO.java:48)
org.apache.jsp.CadastroAposta_jsp._jspService(CadastroAposta_jsp.java:83)

root cause

org.hibernate.HibernateException: /hibernate.cfg.xml not found
org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:147)
org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1405)

org.hibernate.cfg.Configuration.configure(Configuration.java:1427)
org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:972)
org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:69)

org.hibernate.cfg.Configuration.configure(Configuration.java:1414)
org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:966)
DAO.HibernateUtil.(HibernateUtil.java:24)

DAO.ApostaDAO.beginHibernate(ApostaDAO.java:48)
org.apache.jsp.CadastroAposta_jsp._jspService(CadastroAposta_jsp.java:83)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)

javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.
Apache Tomcat/6.0.20[/code]

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