在一个web项目中，如果使用SSH框架，一般在spring中配置事务管理。我们一般不会在dao层使用transaction，事务被配置在service层上更为合理，因为业务层方法表示逻辑上的一个原子操作。
spring中配置service层的事务管里，配置文件中的配置如下：
<bean id="txProxy" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> <property name="beanNames"> <list> <value>*Service</value> //这里表示 </list> </property> <property name="interceptorNames"> <list> <value>transactionInterceptor</value> </list> </property> </bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean> <!-- 配置事务拦截器--> <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor"> <property name="transactionManager"> <ref bean="txManager" /> </property> <!-- 配置事务属性 --> <property name="transactionAttributes"> <props> <prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="update*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="add*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="save*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="query*">PROPAGATION_REQUIRED,readOnly</prop> <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop> <prop key="create*">PROPAGATION_REQUIRED,-Exception</prop> </props> </property> </bean>
2，我尝试在Dao层获取sesssion，然后进行事务处理。代码如下
Session session=manureDao.getHibernateTemplate().getSessionFactory().getCurrentSession(); session.beginTransaction(); ManureInfo manureInfo=(ManureInfo)session.load(ManureInfo.class, 15); System.out.println( manureInfo.getAreaNum()); session.getTransaction().commit(); session.close();
然后报以下异常：
org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here at org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:63) at org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:687) at cn.sinobest.scscms.test.process.TestManure.testUpdateManureInfo(TestManure.java:81) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:274) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:242) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:58) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:240) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:48) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:233) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31) at org.junit.runners.ParentRunner.run(ParentRunner.java:303) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
原因：使用sessionfactory.getcurrentsession执行hibernate操作时，hibernate的操作默认必须包含在一个transaction中，
也就是开始要用session.begiontransaction得到一个transaction 实例(譬如tx), 操作结束时在这个实例上进行事务的
提交tx.commit或回滚tx.rollback. 如果这些crud操作不被包括在一个具体的transaction中，hibernate就会抛出上述异常。
转载于:https://www.cnblogs.com/dandre/p/4507077.html
