Spring e JPA

<?xml version="1.0" encoding="UTF-8"?>
<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"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">

    <bean
        class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

    <bean>
		<jee:jndi-lookup id="entityManagerFactory"
			jndi-name="persistence/persistencia"/>
	</bean>

    <bean id="transactionManager"
        class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="tipoService" class="service.TipoServiceImpl" />
</beans>

~@Transactional
public class TipoServiceImpl implements TipoService {

    @PersistenceContext
	private EntityManager em;

    public void setEntityManager(EntityManager em) {
        this.em = em;
    }

    @SuppressWarnings("unchecked")
    public List<Tipo> findAll() {
        Query query = getEntityManager().createQuery("select p FROM Person p");
        return query.getResultList();
    }
}

public class loginAction extends ActionSupport {

	private List<Tipo> tipos;
	
	private String tipo;

	private TipoService tipoService;
	
	public String execute() throws Exception {
		tipos = tipoService.findAll();
        return SUCCESS;
    }
}

<listener>  
         <listener-class>  
             org.springframework.web.context.ContextLoaderListener  
         </listener-class>  
     </listener>  
   
     <listener>  
         <listener-class>  
             org.springframework.web.context.request.RequestContextListener  
         </listener-class>  
     </listener>

<context-param>  
         <param-name>contextConfigLocation</param-name>  
         <param-value>  
             /WEB-INF/spring-config.xml, /WEB-INF/spring-security.xml, /WEB-INF/spring-core.xml  
         </param-value>  
     </context-param>

SEVERE: Context initialization failed
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unnamed bean definition specifies neither 'class' nor 'parent' nor 'factory-bean' - can't generate bean name
Offending resource: ServletContext resource [/WEB-INF/applicationContext.xml]

<servlet>
  	<servlet-name>nomeDoServlet</servlet-name> 
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
  	<load-on-startup>1</load-on-startup> 
  </servlet>
 
  <servlet-mapping>
 	 <servlet-name>nomeDoServlet</servlet-name> 
 	 <url-pattern>*.htm</url-pattern> 
  </servlet-mapping>

Error creating bean with name 'entityManagerFactory': Invocation of init method failed; nested exception is javax.naming.NameNotFoundException: Name persistence is not bound in this Context

<bean>  
         <jee:jndi-lookup id="entityManagerFactory"  
             jndi-name="persistence/persistencia"/>

<beans>

    <jee:jndi-lookup id="entityManagerFactory" jndi-name="persistence/myPersistenceUnit"/>

</beans>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="loadTimeWeaver">
			<bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
		</property>
	</bean>

	<bean id="productDAO" class="orm.dataaccess.dao.ProductDAO" />

	<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

	<tx:annotation-driven transaction-manager="txManager" proxy-target-class="true" />

	<bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory" ref="entityManagerFactory" />
	</bean>

<context-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>
		/WEB-INF/jpa-servlet.xml
	</param-value>
  </context-param>

  <filter>  
     <filter-name>transactionFilter</filter-name>  
         <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>  
     </filter>  
       
  <filter-mapping>  
      <filter-name>transactionFilter</filter-name>  
         <url-pattern>/*</url-pattern>  
  </filter-mapping>
  
  <listener>  
      <listener-class>  
          org.springframework.web.context.ContextLoaderListener  
      </listener-class>  
  </listener>  
   
  <listener>  
      <listener-class>  
           org.springframework.web.context.request.RequestContextListener  
      </listener-class>  
  </listener>

@PersistenceContext
private EntityManager _entityManager = null;

public EntityManager getEntityManager() {
		return _entityManager;
	}
	
	public void setEntityManager(EntityManager entityManager) {
		_entityManager = entityManager;
	}

@Transactional
	public void insert(Entity entity) {
		_entityManager.persist(entity);
	}