Question

我是Heroku的新手，但过去曾使用过Hibernate。我正在尝试查询我的Heroku数据库，但我没有得到任何结果。我知道我查询的数据库表中有一条记录。

如果有人能够发现我忽略的东西（经过多次搜索，头脑刮擦等），我将非常感激

这是我的servlet.xml文件（Spring）

<bean id="dbUrl" class="java.net.URI">
    <constructor-arg value="#{systemEnvironment['DATABASE_URL']}"/>
    <!-- <constructor-arg value="postgres://hfdovnidtaqsou:hK6uveO4d7nls_ogdrKjsSYzGs@ec2-54-195-243-250.eu-west-1.compute.amazonaws.com:5432/db7nnh2r11om9c"/> -->
</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="org.postgresql.Driver"/>
    <property name="url" value="#{ 'jdbc:postgresql://' + @dbUrl.getHost() + ':' + @dbUrl.getPort() + @dbUrl.getPath() }"/>
    <property name="username" value="#{ @dbUrl.getUserInfo().split(':')[0] }"/>
    <property name="password" value="#{ @dbUrl.getUserInfo().split(':')[1] }"/>
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" p:dataSource-ref="dataSource" p:configLocation="${hibernate.config}" p:packagesToScan="com.yomi.*">
    <property name="annotatedClasses">
        <list>
            <value>com.yomi.beans.User</value>
        </list>
    </property>
 </bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" p:sessionFactory-ref="sessionFactory" />

这是我的hibernate.cfg

<hibernate-configuration>
<session-factory>
    <!-- <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property> -->
    <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
    <property name="show_sql">true</property>
    <property name="format_sql">true</property>
    <property name="use_sql_comments">true</property>
    <property name="defaultNChar">true</property>
</session-factory>

最后，这是我尝试查询数据库的类：

@Transactional
public class UserTestServiceImpl implements UserTestService {
private SessionFactory sessionFactory;

private final Log logger = LogFactory.getLog(getClass());

/**
 * @param sessionFactory the sessionFactory to set
 */
public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}

/**
 * {@inheritDoc}
 */
@SuppressWarnings("unchecked")
public List<User> readUsers() {
    // Retrieve session from Hibernate
    Session session = sessionFactory.getCurrentSession();
    logger.warn("=============== session=" + session + " ================");
    logger.warn("=============== session.isOpen()=" + session.isOpen() + " ================");

    // Create a Hibernate query (HQL)
    Query query = session.createQuery("FROM com.yomi.beans.User");

    List<User> users = query.list();
    logger.info("=======================================users.size():" + users.size());

    return users;
    }
}

heroku hibernate查询没有结果

0 个答案: