Servlet -context.xml 中的 SessionFactory 配置

Question

我是 Spring+hibernate 的新手。我正在使用 Spring+hibernate+postgresql 数据库。 我通过eclipse创建了hibernate.cfg.xml。我已经给出了连接 url、连接名称、密码、驱动程序类。接下来我要在 servlet.context.xml 中配置 sessionFactory。

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

<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />

<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />

<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean>

<context:component-scan base-package="com.example" />

 <beans:bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <!--<property name="schemaUpdate" value="true" />-->
    <beans:property name="hibernateProperties">
        <beans:props>
            <beans:prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</beans:prop>
        </beans:props>
    </beans:property>
</beans:bean>

<!-- Hibernate Transaction Manager -->
<beans:bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <beans:property name="sessionFactory" ref="sessionFactory"/>
</beans:bean>

<!-- Activates annotation based transaction management -->

但现在仍然无法自动装配 sessionFactory。我还有什么遗漏吗？

Answer 1

您的 sessionFactory bean 中缺少 hibernate.cfg.xml 位置，请像这样提供 hibernate 配置位置。

 <beans:bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
 <!--<property name="schemaUpdate" value="true" />-->
    <beans:property name="configLocation" value="/WEB-INF/hibernate.cfg.xml" />
    <beans:property name="hibernateProperties">
        <beans:props>
            <beans:prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</beans:prop>
        </beans:props>
    </beans:property>
</beans:bean>

此外，在 hibernate.cfg.xml 文件中提供数据库用户名、密码、url、驱动程序等并不是一个更好的选择，相反，您可以创建一个数据源 bean 并将该 bean 注入会话工厂，如下所示：

<beans:bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <beans:property name="driverClassName" value="${db.driver}" />
    <beans:property name="url" value="${db.jdbcurl}" />
    <beans:property name="username" value="${db.username}" />
    <beans:property name="password" value="${db.password}" />
</beans:bean>

 <beans:bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
 <!--<property name="schemaUpdate" value="true" />-->
    <beans:property name="dataSource" ref="dataSource"></property>
    <beans:property name="configLocation" value="/WEB-INF/hibernate.cfg.xml" />
    <beans:property name="hibernateProperties">
        <beans:props>
            <beans:prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</beans:prop>
        </beans:props>
    </beans:property>
</beans:bean>