我正在尝试在一个测试用例中访问当前的hibernate会话，并收到以下错误：

org.hibernate.HibernateException：没有绑定到线程的Hibernate会话，并且配置不允许在org.hibernate.impl的org.springframework.orm.hibernate3.SpringSessionContext.currentSession（SpringSessionContext.java:63）处创建非事务性会话。
.SessionFactoryImpl.getCurrentSession（SessionFactoryImpl.java:574）

我显然错过了某种设置，但不确定是什么。

任何帮助将不胜感激。这是我在Hibernate / Spring等机构的第一个裂缝，学习曲线肯定陡峭！

代码如下：

令人反感的类：

public class DbUnitUtil extends BaseDALTest {
    @Test
    public void exportDtd() throws Exception
    {

        Session session = sessionFactory.getCurrentSession();

        session.beginTransaction();
        Connection hsqldbConnection = session.connection();

        IDatabaseConnection connection = new DatabaseConnection(hsqldbConnection);

        // write DTD file
        FlatDtdDataSet.write(connection.createDataSet(), new FileOutputStream("test.dtd"));
    }
}

基类：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class BaseDALTest extends AbstractJUnit4SpringContextTests {
    public BaseDALTest()
    {
        super();
    }
        @Resource
        protected SessionFactory sessionFactory;
}

applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName">
            <value>org.hsqldb.jdbcDriver</value>
        </property>
        <property name="url">
            <value>jdbc:hsqldb:mem:sample</value>
        </property>
        <property name="username">
            <value>sa</value>
        </property>
        <property name="password">
            <value></value>
        </property>
    </bean>

    <bean id="sessionFactory" class="com.foo.spring.AutoAnnotationSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="entityPackages">
            <list>
                <value>com.sample.model</value>
            </list>
        </property>
        <property name="schemaUpdate">
            <value>true</value>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect
                </prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
    </bean>
</beans>