Olá pessoal,
Estou com dificuldades em configurar meu applicationContext.xml 
Está ocorrendo o seguinte erro:
2007-10-23 10:40:42,578 ERROR web.context.ContextLoader -> Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/applicationContext-base.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'dataSource' of bean class [org.springframework.orm.jpa.LocalEntityManagerFactoryBean]: Bean property 'dataSource' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
Caused by:
org.springframework.beans.NotWritablePropertyException: Invalid property 'dataSource' of bean class [org.springframework.orm.jpa.LocalEntityManagerFactoryBean]: Bean property 'dataSource' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
Eu já tendei seguir alguns exemplos, mas realmente não estou conseguindo.
Segue como está a configuração até agora:
applicationContext-base.xml
<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/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd"
default-autowire="byName">
<!-- Le o arquivo de configuracoes JDBC -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" dependency-check="none">
<property name="location">
<value>/WEB-INF/jdbc.properties</value>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>${driver}</value>
</property>
<property name="url">
<value>${url}</value>
</property>
<property name="username">
<value>${username}</value>
</property>
<property name="password">
<value>${password}</value>
</property>
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="persistenceUnitName" value="consysPersistenceUnit" />
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionIterceptor"
abstract="true"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<!-- Injeta o "transactionManager" -->
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<!-- Quando deve propagar ao transactionManager -->
<property name="transactionAttributes">
<props>
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="get*">PROPAGATION_REQUIRED</prop>
<prop key="*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator" />
<aop:aspectj-autoproxy proxy-target-class="false"/>
</beans>
applicationContext-beans.xml
<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/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd"
default-autowire="byName">
<bean id="pessoaDAO" class="br.com.conectait.dao.PessoaDAO" />
<bean id="pessoaService" class="br.com.conectait.services.PessoaService" parent="transactionIterceptor">
<property name="pessoaDAO">
<ref bean="pessoaDAO" />
</property>
</bean>
</beans>
Se alguém puder me explicar na verdade como seguir, pois estou um pouco confusa, ficarei muito grata!
