在spring配置hibernate的申明事务的时候,发现事务控制一直都不好使，关键配置如下：
spring的MVC的配置如下： 

    <context:component-scan base-package="com.going"/>
<context:annotation-config />

<!-- To enable @RequestMapping process on type level and method level -->
<bean
  class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean
  class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
  <property name="messageConverters">
   <list>
    <ref bean="marshallingConverter" />
    <ref bean="jsonConverter" />
    <ref bean="atomConverter" />
   </list>
  </property>
</bean>

<!-- XML Converter -->
<bean id="marshallingConverter"
  class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
  <constructor-arg ref="jaxbMarshaller" />
  <property name="supportedMediaTypes" value="application/xml" />
</bean>

<bean id="jaxbMarshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
  <property name="classesToBeBound">
   <list>
    <value>com.going.sample.domain.Employee</value>
    <value>com.going.sample.domain.EmployeeList</value>
   </list>
  </property>
</bean>

<!-- JSON Converter -->
<bean id="jsonConverter"
  class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
  <property name="supportedMediaTypes" value="application/json" />
</bean>

<!-- ATOM Converter -->
<bean id="atomConverter"
  class="org.springframework.http.converter.feed.AtomFeedHttpMessageConverter">
  <property name="supportedMediaTypes" value="application/atom+xml" />
</bean>

<!-- Client -->
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
  <property name="messageConverters">
   <list>
    <ref bean="marshallingConverter" />
    <ref bean="jsonConverter" />
    <ref bean="atomConverter" />
   </list>
  </property>
</bean>
<!-- viewer -->
<!-- xmlView -->
<bean id="xmlView"
  class="org.springframework.web.servlet.view.xml.MarshallingView">
  <constructor-arg ref="jaxbMarshaller" />
</bean>
<!-- jsonView -->
<bean id="jsonView"
  class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />

<bean
  class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
  <property name="mediaTypes">
   <map>
    <entry key="json" value="application/json" />
    <entry key="xml" value="application/xml" />
    <entry key="html" value="text/html" />
   </map>
  </property>
  <property name="viewResolvers">
   <list>
    <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
    <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
    <bean id="viewResolver"
     class="org.springframework.web.servlet.view.UrlBasedViewResolver">
     <property name="viewClass"
      value="org.springframework.web.servlet.view.JstlView" />
     <property name="prefix" value="/WEB-INF/view/jsp/" />
     <property name="suffix" value=".jsp" />
    </bean>
   </list>
  </property>
</bean>
 

 

applicationContext.xml的配置如下： 

<!-- 数据源的配置 -->
<bean id="dataSource"
  class="org.apache.commons.dbcp.BasicDataSource"
  destroy-method="close"
  p:driverClassName="${jdbc.driverClassName}"
  p:url="${jdbc.databaseurl}"
  p:username="${jdbc.username}"
  p:password="${jdbc.password}" />

<!-- hibernate工厂类的配置 -->
<bean id="sessionFactory"
  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="configLocation">
   <value>classpath:hibernate.cfg.xml</value>
  </property>
  <property name="configurationClass">
   <value>org.hibernate.cfg.AnnotationConfiguration</value>
  </property>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">${jdbc.dialect}</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.jdbc.fetch_size">25</prop>
                <prop key="hibernate.jdbc.batch_size">50</prop>
                <!-- dev -->
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.generate_statistic">false</prop>
                <!-- cache -->
                <!--代表是否使用查询缓存，这里不使用，因为一般而言查询缓存的命中率并不是很高，所以我们没有 必要为每一个用户的查询缓存它的数据，所以这里设为false-->
                <prop key="hibernate.cache.use_query_cache">false</prop>
                <!--代表使用Hibernate的二级缓存-->
                <prop key="hibernate.cache.use_second_level_cache">false</prop>
                <!-- create db table -->
                <prop key="hibernate.hbm2ddl.auto">update</prop>   
   </props>
  </property>
</bean>

<bean id="transactionManager"
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory" />
</bean>

 

在以上配置的情况下，无论我的service怎么配置@Transactional注解，都无效，如： 

@Service
@Transactional
public class ContactServiceImpl implements ContactService {

@Autowired
private ContactRepository contactRepository;
 

public ContactRepository getContactRepository() {
  return contactRepository;
}

public void setContactRepository(ContactRepository contactRepository) {
  this.contactRepository = contactRepository;
}

@Transactional(propagation=Propagation.REQUIRED)
public void addContact(Contact contact) {
  contactRepository.addContact(contact);
}

public List<Contact> listContact() {
  return contactRepository.listContact();
}

@Transactional(readOnly = true)
public void removeContact(String id) {
  contactRepository.removeContact(id);
}
}
 

 

即使我在removeContact方法中添加只读控制readOnly = true,相关删除实体操作一样能够正常执行。
后面在网上搜了一些信息，问题在于spring在实例化@Controller类时，Spring会自动把关联的@Service（此@Service已做了@Transaction事务注解）类实例化，此时事务并未生效，导致@Transaction注解无效，事务未被注册。解决办法如下：
将spring的mvc配置中的以下信息： 

<context:component-scan base-package="com.going" /> 

修改为： 

    <context:component-scan base-package="com.going">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service" />
    </context:component-scan> 

表示容器在使用注解加载控制层时,不实例化控制层以外的组件。
除此以外，也将applicationContext.xml文件中添加如下的配置：

    <context:component-scan base-package="com.going">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan> 

 

意思就是说使用注解加载除控制层以外的组件，这时，在加载service层时事务就会关联在服务层上，相关的事务注解的配置也就生效了。