spring-data-jpa事务不起作用

Question

spring-data-jpa中的repository事务没有问题，但是在Service中添加Transactional注解事务就不起作用，
中间有异常不能回滚，spring的配置如下

 <?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:jpa="http://www.springframework.org/schema/data/jpa"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <!-- 指定数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 指定Jpa持久化实现厂商类,这里以Hibernate为例 -->
        <property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter"/>
        <property name="packagesToScan" value="com.test.domain"/>
        <property name="jpaProperties">
            <props>
                <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
                <prop key="javax.persistence.validation.mode">none</prop>
                <prop key="hibernate.use_sql_comments">false</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.max_fetch_depth">1</prop>
                <!-- 二级缓存设置 -->
                <prop key="hibernate.cache.use_second_level_cache">true</prop>
                <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
                <prop key="hibernate.cache.use_query_cache">true</prop>
            </props>
        </property>
        <property name="sharedCacheMode" value="ENABLE_SELECTIVE"/>
    </bean>

    <!-- Hibernate对Jpa的实现 -->
    <bean id="hibernateJpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>

    <!-- 数据源配置,使用应用内的DBCP数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="driverClassName" value="${db.driverClass}"/>
        <property name="url" value="${db.jdbcUrl}"/>
        <property name="username" value="${db.user}"/>
        <property name="password" value="${db.password}"/>

        <!-- 配置初始化大小、最小、最大 -->
        <property name="initialSize" value="${db.initialSize}"/>
        <property name="minIdle" value="${db.minIdle}"/>
        <property name="maxActive" value="${db.maxActive}"/>
        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="${db.maxWait}"/>
        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="${db.timeBetweenEvictionRunsMillis}"/>
        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="${db.minEvictableIdleTimeMillis}"/>

        <property name="testWhileIdle" value="true"/>
        <property name="testOnBorrow" value="false"/>
        <property name="testOnReturn" value="false"/>
        <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
        <property name="poolPreparedStatements" value="${db.poolPreparedStatements}"/>
        <property name="maxPoolPreparedStatementPerConnectionSize" value="${db.maxPoolPreparedStatementPerConnectionSize}"/>
    </bean>

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

    <jpa:repositories base-package="com.test.dao.reposities.db" entity-manager-factory-ref="entityManagerFactory" transaction-manager-ref="transactionManager" />

</beans>

 <!-- 组件自动扫描 （注解） -->
    <context:component-scan base-package="com.test">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController"/>
    </context:component-scan>

    <!-- 开启注解事务 -->
    <!--
        使用 JDK 动态代理： proxy-target-class="false" @Transactional可以标注在接口或者父类上
        使用CGLIB动态代理： proxy-target-class="true"  @Transactional不能标注在接口或者父类上，需要标注在业务实现类或是其方法上，否则事务不生效
    -->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />

请大神们给解答一些为什么在Service中配置事务不起作用？

Answer 1

http://www.oschina.net/question/247934_93451