Começando com Spring + Hibernate + HibernateAnnotations

TesteSpring
  |--src  // Onde ficarão os fontes
  |--xml // Onde ficarão os arquivos XML do Spring
  |--build
      |--classes // Onde ficarão os .class
  |--WebContent
      |--WEB-INF
          |--lib    // Onde ficarão as libs do projeto

package br.com.teste.dto;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Medico {

  @Id
  @Column(name = "num_crm", nullable = false, length = 8)
  private Integer numeroCrm;

  @Column(name = "nom_medico", length = 100)
  private String nome;

  @Column(name = "cpf_medico", length = 11)
  private String cpf;
	
  public String getCpf() {
    return cpf;
  }

  public void setCpf(String cpf) {
    this.cpf = cpf;
  }

  public String getNome() {
    return nome;
  }

  public void setNome(String nome) {
    this.nome = nome;
  }

  public Integer getNumeroCrm() {
    return numeroCrm;
  }

  public void setNumeroCrm(Integer numeroCrm) {
    this.numeroCrm = numeroCrm;
  }
	
}

package br.com.teste.dto;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.orm.hibernate3.HibernateTemplate;

public class Teste {

  private HibernateTemplate hibernateTemplate;
	
  private Medico medico;
	
  public static void main(String[] args) {
  
    try {

	ApplicationContext context = new ClassPathXmlApplicationContext(
                    new String[] { "hello.xml" } );
			
	BeanFactory factory = ( BeanFactory ) context;
			
	Teste teste = ( Teste ) factory.getBean( "teste" );
			
	teste.updateMedico( teste.getMedico() );
			
	System.out.println( teste.getMedico().getNumeroCrm() );
	System.out.println( teste.getMedico().getNome() );
	System.out.println( teste.getMedico().getCpf() );
			
    } catch (Exception ex) {
	System.out.println( ex.getMessage() );
    }
		
  }
	
  /**
   * Insere ou atualiza um registr de um médico.
   * @param medico
   */
  public void updateMedico(Medico medico) {
    this.getHibernateTemplate().saveOrUpdate(medico);
  }
	
  /**
   * @return the hibernateTemplate
   */
  public HibernateTemplate getHibernateTemplate() {
    return hibernateTemplate;
  }

  /**
   * @param hibernateTemplate the hibernateTemplate to set
   */
  public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
    this.hibernateTemplate = hibernateTemplate;
  }

  /**
   * @return the medico
   */
  public Medico getMedico() {
    return medico;
  }

  /**
   * @param medico the medico to set
   */
  public void setMedico(Medico medico) {
    this.medico = medico;
  }
	
}

&lt?xml version="1.0" encoding="UTF-8"?&gt

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd 
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-2.0.xsd	
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName">
    <value>org.postgresql.Driver</value>
  </property>
  <property name="url">
    <value>jdbc:postgresql://localhost:5432/postgres</value>
  </property>
  <property name="username">
    <value>postgres</value>
  </property>
  <property name="password">
    <value>fbma110883</value>
  </property>
</bean>
  
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
  <property name="dataSource" ref="dataSource"/>
  <property name="annotatedClasses">
    <value>br.com.teste.dto.Medico</value>
  </property>
  <property name="hibernateProperties">
    <props>
      <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
      <prop key="hibernate.show_sql">true</prop>
      <prop key="hibernate.format_sql">true</prop>
      <prop key="hibernate.use_sql_comments">true</prop>
      <prop key="hibernate.generate_statistics">true</prop>
    </props>
  </property>
</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
  <property name="sessionFactory" ref="sessionFactory" />
</bean>
  
<tx:annotation-driven transaction-manager="transactionManager"/>
  
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory"/>
</bean>
 
<bean id="teste" class="br.com.teste.dto.Teste">
  <property name="hibernateTemplate" ref="hibernateTemplate" />
  <property name="medico" ref="medico" />
</bean>
  
<bean id="medico" class="br.com.teste.dto.Medico">
  <property name="numeroCrm" value="4811" />
  <property name="nome" value="Dra. Edinalva Barreto" />
  <property name="cpf" value="[telefone removido]" />
</bean>
 
</beans>