今天整合spring和hibernate中报了一个意想不到的错误:
Exception in thread "main" org.hibernate.HibernateException: save is not valid without active transaction
at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:341)
at $Proxy16.save(Unknown Source)
配置文件如下:
Xml代码
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd" >
<!-- Creates the registry of flow definitions for this application -->
<!-- 要使用注解必须添加此项 -->
<context:annotation-config />
<!-- 自动检测组件
-->
<context:component-scan base-package="com.spring.service.impl,com.spring.dao,com.spring.aop" />
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!-- 扫描实体包 -->
<property name="packagesToScan">
<value>com.spring.domain</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<!--
加上下面这句话会出错
Exception in thread "main" org.hibernate.HibernateException: save is not valid without active transaction
-->
<prop key="hibernate.current_session_context_class">thread</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<!-- 设定transactionManager -->
<bean id="txManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!--启动spring事务注解功能-->
<tx:annotation-driven transaction-manager="txManager"/>
</beans>
正如配置文件中红色文字所示,在单独使用hibernate时,总是会加上这项配置,但spring与hibernate结合时,千万不能加上这句 话,我猜测出错原因是事务管理器中的session和当前拿到的session不是同一个session,事务管理器中拿到的session开启了事务, 但当前得到的session并没有开启事务,导致出错