java - hibernate中如何获取当前session

Question

我试图在 hibernate 状态下获取当前 session 以创建条件查询，但出现错误。

这是我的代码:

数据源.xml:

    <bean id="entityManagerFactory"
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
    <property name="dataSource" ref="dataSource" />
    <property name="persistenceUnitName" ref="persistenceUnit" />
    <property name="jpaProperties" ref="jpaProperties" />
</bean>

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
</bean>

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

<bean id="jpaVendorAdapter"
    class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
    <property name="databasePlatform" ref="sqlDialect" />
</bean>

java 类:

    @Autowired
    private SessionFactory  sessionFactory;
    Session session = sessionFactory.getCurrentSession();

    FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(em);
    List<Product> bookResult = new ArrayList<>();
    try {
        // This will ensure that index for already inserted data is created.
        fullTextEntityManager.createIndexer().startAndWait();
        QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder().forEntity(Product.class).get();
    org.apache.lucene.search.Query query = qb.keyword().onFields("name").matching("cocacola").createQuery();
        javax.persistence.Query jpaQuery = fullTextEntityManager.createFullTextQuery(query, Product.class);

        Criteria criteria = session.createCriteria(Product.class);
        criteria.add(Restrictions.eq("category.supermarket", "mercadona"));

        List<Product> productos = criteria.list();

但出现此错误:

org.hibernate.HibernateException: No Session found for current thread at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:106)

如何解决这个问题？

Answer 1

您是否已添加到 servlet-context.xml

<tx:annotation-driven transaction-manager="transactionManager" />

使用@Transaction？

还要检查 @Autowired 是否正常工作，例如 class.java 中的 System.out.println(sessionFactory) 以确保它不为 null。