org.springframework.dao.InvalidDataAccessApiUsageException：只读模式下不允许写操作

Question

我是 SSH 新手，我正在使用 Spring 4、Hibernate 4 和 Struts 2。 当我为 DAO 类创建单元测试时，我遇到了这个异常。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath*:testApplicationContext.xml"})
public class UserDaoTest {
    @Test
    public void testAddUserNotExists() {
        User user = new User("20116524", "785ee107c11dfe36de668b1ae7baacbb");
        userDao.addUser(user);

        assertNotNull(userDao.getUserByUsername("20116524"));
    }

    @Autowired
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    /**
     * UserDao object to test.
     */
    private UserDao userDao;
}

我尝试在web.xml 中添加以下行，但它不起作用。

参考：Java / Hibernate - Write operations are not allowed in read-only mode

我认为我的applicationContext.xml 有问题，内容如下：

<!-- Session Factory -->
<bean id="sessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="configLocation" value="classpath:hibernate.cfg.xml"/>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
    <property name="packagesToScan">
        <list>
            <value>emis.accounts.model</value>
        </list>
    </property>
</bean>
<!-- Transaction -->
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

没有关于AOP和tx:advice的配置。所以我尝试添加一些行：

<!-- Transaction -->
<bean id="transactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="*" propagation="REQUIRED" read-only="true"/>
        <tx:method name="get*" propagation="REQUIRED" read-only="true" />
        <tx:method name="find*" propagation="REQUIRED" read-only="true" />
        <tx:method name="list*" propagation="REQUIRED" read-only="true" />
        <tx:method name="load*" propagation="REQUIRED" read-only="true" />
        <tx:method name="save*" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="add*" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="save" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="update" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="delete" propagation="REQUIRED" rollback-for="Exception" />
        <tx:method name="*" propagation="REQUIRED" />
    </tx:attributes>
</tx:advice>

<aop:aspectj-autoproxy />
<aop:config>
    <aop:pointcut id="aopPointcut"
        expression="execution(* emis.*.service.*.*(..))" />
    <aop:advisor advice-ref="txAdvice" pointcut-ref="aopPointcut"/>
</aop:config>

但是，我遇到了另一个例外：

WARNING: Exception thrown from ApplicationListener handling ContextClosedEvent
java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: Root WebApplicationContext: startup date [Thu Mar 20 13:53:51 CST 2014]; root of context hierarchy
    at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:346)
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:333)
    at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:880)
...

WARNING: Exception thrown from LifecycleProcessor on context close
java.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: Root WebApplicationContext: startup date [Thu Mar 20 13:53:51 CST 2014]; root of context hierarchy
    at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:359)
    at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:888)
    at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:841)
...

我该怎么办？谁能帮我？非常感谢！！

Answer 1

首先确定要用于交易的内容。 XML 配置或注解@Transactional。不要试图混合它们。

如果您使用@Transactional，请确保您的UserDao 带有正确的注释。

如果您使用 XML，请确保您在 tx:advice 中的顺序正确。目前一切都是只读的。第一场比赛获胜，因为您在顶部有一个通配符*，所有内容都将匹配该切入点。接下来你不需要<aop:aspectj-autoproxy />，因为你已经用<aop:config /> 块声明了你的方面。