hibernate报错：save is not valid without active transaction

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 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