Spring+Hibernate进行单元测试时出现read-only mode错误

框架版本

springframework 4.x
hibernate 5.x

spring 设置

<aop:config expose-proxy="false">    <aop:advisor id="serviceTx" advice-ref="txAdvice"        pointcut="execution(* *..service.*Service.*(..))" order="2" /></aop:config><tx:advice id="txAdvice" transaction-manager="transactionManager">    <tx:attributes>        <tx:method name="get*" propagation="SUPPORTS" read-only="true" />        <tx:method name="count*" propagation="SUPPORTS" read-only="true" />        <tx:method name="find*" propagation="SUPPORTS" read-only="true" />        <tx:method name="list*" propagation="SUPPORTS" read-only="true" />        <tx:method name="*" read-only="false" propagation="REQUIRED" />    </tx:attributes></tx:advice>

问题

对Service层做单元测试时，要进行相应保存操作。

@Testpublic void testSave() {    try {        User user = new User();        user.setNickname("akio...akio");        userService.save(user);    } catch (Exception e) {        e.printStackTrace();        Assert.fail();    }}

但是在对Dao层做单元测试时:

@Testpublic void testSave() {    try {        User user = new User();        user.setNickname("akioyuan.cn");        userDao.save(user);    } catch (Exception e) {        e.printStackTrace();        Assert.fail();    }}

出现错误：

Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove ‘readOnly’ marker from transaction definition.

明明没有将save*方法设置为readOnly，但是却提示“read-only mode”。

解决

给Dao层也加上事务声明，问题解决。

<aop:config expose-proxy="false">    <!-- Service层事务通用增强 -->    <aop:advisor id="serviceTx" advice-ref="txAdvice"        pointcut="execution(* *..service.*Service.*(..))" order="2" />    <!-- Dao层事务通用增强 -->    <aop:advisor advice-ref="txAdvice" pointcut="execution(* *..dao.*Dao.*(..))" /></aop:config>

难道默认的事务都是read-only的么?