在spring整合hibernate过程中，我们的配置文件：

<?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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
"><context:annotation-config></context:annotation-config>
<context:component-scan base-package="com.spring"></context:component-scan>
<!-- <context:property-placeholder location="classpath*:properties/jdbc.property" /> -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath*:properties/jdbc.properties"/>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" >
<property name="url" value="${jdbc.url}"/>
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<bean id="SessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="annotatedClasses"><list><value>com.spring.model.User</value><value>com.spring.model.Log</value></list></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key=" hibernate.format_sql">true</prop></props></property></bean><!--利用Hibernate的事物，将sessionfactory注入 -->
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="SessionFactory" />
</bean>
<tx:annotation-driven transaction-manager="txManager"/>
</beans>

利用Transactional 开启事务

@Transactionalpublic void add(User user) {if (userDAO == null||logDAO==null)System.out.println("erro");else {userDAO.add(user);logDAO.addLog(new Log());}}

调用代码

public class LogDAOImpl implements LogDAO {private SessionFactory sessionFactory;public SessionFactory getSessionFactory() {return sessionFactory;  }@Resourcepublic void setSessionFactory(SessionFactory sessionFactory) {this.sessionFactory = sessionFactory;}/** 利用Spring——hibernate的事务bean管理事务，* 写了@Transaction相当于在方法之前加了beginTranscation* 后加了commit（），当然之前已经获取到session，* 不再需要获取session* @see com.spring.dao.LogDAO#addLog(com.spring.model.Log)*/@Overridepublic void addLog(Log log) {// TODO Auto-generated method stub// System.out.println("user added successful");Session session=sessionFactory.getCurrentSession();log.setMes("save success by transaction too long may be cancel");session.save(log);}
}

测试过程中总是报错：HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation

问题分析：

在spring中我们 通过配置文件，来获取Hibernate的 SessionFactory，并将这个sessionfactory放在txmanager这个bean中管理，

我们在addLog中没有开启事务，没有结束事务，这个就是spring通过AOP在我们的save逻辑之前和之后加了事务的逻辑方法。

我们知道AOP是通过动态代理（dynamc proxy）实现的，而dynamic prox又有两种实现方式：proxy,和cglib实现

proxy实现需要类实现接口，cglib实现是直接在修改二进制码

可以看出我这里是没有加cglib的jar包导致