五种Spring事务的配置方式

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事务策略配置管理器
PROPAGATION_REQUIRED:支持当前事务,如果当前没有事务,就新建一个事务。这是最常见的选择。spring默认的事务策略
PROPAGATION_SUPPORTS:支持当前事务,如果当前没有事务,就以非事务方式执行。
PROPAGATION_MANDATORY:支持当前事务,如果当前没有事务,就抛出异常。
PROPAGATION_REQUIRES_NEW:新建事务,如果当前存在事务,把当前事务挂起。
PROPAGATION_NOT_SUPPORTED:以非事务方式执行操作,如果当前存在事务,就把当前事务挂起。
PROPAGATION_NEVER:以非事务方式执行,如果当前存在事务,则抛出异常。
PROPAGATION_NESTED:如果当前存在事务,则在嵌套事务内执行。如果当前没有事务,则进行与PROPAGATION_REQUIRED类似的操作。
-Exception表示有Exception抛出时,事务回滚. -代表回滚+就代表提交

readonly 就是read only, 设置操作权限为只读,一般用于查询的方法,优化作用.


1:每个Bean都有一个代理(个人不赞同这种配置,代码太臃肿了,例子就网上拉一个下来,感觉还是配置在service层比较好哈)

    <bean id="sessionFactory"             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">         <property name="configLocation" value="classpath:hibernate.cfg.xml" />         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />    </bean>     <!-- 定义事务管理器(声明式的事务) -->     <bean id="transactionManager"        class="org.springframework.orm.hibernate3.HibernateTransactionManager">        <property name="sessionFactory" ref="sessionFactory" />    </bean>       <!-- 配置DAO -->    <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl">        <property name="sessionFactory" ref="sessionFactory" />    </bean>       <bean id="userDao"         class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">            <!-- 配置事务管理器 -->            <property name="transactionManager" ref="transactionManager" />            <property name="target" ref="userDaoTarget" />          <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" />        <!-- 配置事务属性 -->         <property name="transactionAttributes">             <props>                 <prop key="*">PROPAGATION_REQUIRED</prop>            </props>         </property>     </bean>



2:所有Bean共享一个代理基类(自己项目中正使用的)

<!-- 定义事务管理器 --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean><!--transactionProxy--><bean id="transactionProxy" abstract="true"class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"><property name="transactionManager" ref="transactionManager" /><property name="transactionAttributes"><props><prop key="get*">PROPAGATION_REQUIRED,readOnly</prop><prop key="find*">PROPAGATION_REQUIRED,readOnly</prop><prop key="list*">PROPAGATION_REQUIRED,readOnly</prop><prop key="load*">PROPAGATION_REQUIRED,readOnly</prop><prop key="save*">PROPAGATION_REQUIRED,-Exception</prop><prop key="add*">PROPAGATION_REQUIRED,-Exception</prop><prop key="update*">PROPAGATION_REQUIRED,-Exception</prop><prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop><prop key="*">PROPAGATION_REQUIRED</prop></props></property></bean>    <bean id="userDao" class="com.yeshun.dao.impl.UserDaoImpl" parent="baseDAO" />            <bean id="userService" parent="transactionProxy"><property name="target"><bean class="com.yeshun.service.impl.UserServiceImpl"><property name="userDao" ref="userDao" /></bean></property></bean>

3:使用拦截器

<!-- 定义事务管理器 --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean><bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">  <property name="transactionManager" ref="transactionManager"></property>  <property name="transactionAttributes">    <props>        <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop><prop key="find*">PROPAGATION_REQUIRED,readOnly</prop><prop key="list*">PROPAGATION_REQUIRED,readOnly</prop><prop key="load*">PROPAGATION_REQUIRED,readOnly</prop><prop key="save*">PROPAGATION_REQUIRED,-Exception</prop><prop key="add*">PROPAGATION_REQUIRED,-Exception</prop><prop key="update*">PROPAGATION_REQUIRED,-Exception</prop><prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop><prop key="*">PROPAGATION_REQUIRED</prop>    </props>  </property></bean><bean id="beanNameAutoProxyCreator" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">  <property name="beanNames">    <value>*Service</value>  </property>  <property name="interceptorNames">    <list>       <value>transactionInterceptor</value>    </list>  </property></bean><bean id="userService" class="com.yeshun.service.impl.UserServiceImpl"><property name="userDao" ref="userDao" /></bean>

4:使用tx标签配置的拦截器(这个方式不错)

<!-- 定义事务管理器 --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean>        <tx:advice id="txAdvice" transaction-manager="transactionManager">        <tx:attributes>            <tx:method name="get*" propagation="REQUIRED" read-only="true" />            <tx:method name="find*" propagation="REQUIRED" read-only="true" />            <tx:method name="list*" propagation="REQUIRED" read-only="true" />            <tx:method name="load*" propagation="REQUIRED" read-only="true" />            <tx:method name="save*" propagation="REQUIRED" rollback-for="Exception"/>            <tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/>            <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception"/>            <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception"/>    <!-- 其他方法使用默认的事务设置 -->            <tx:method name="*" propagation="REQUIRED"/>        </tx:attributes>    </tx:advice>       <aop:config>        <aop:pointcut id="aopPointcut"            expression="execution(* com.yeshun.service.impl.*Impl.*(..))" />        <aop:advisor advice-ref="txAdvice"            pointcut-ref="aopPointcut" />           </aop:config>    <bean id="userService" class="com.yeshun.service.impl.UserServiceImpl"><property name="userDao" ref="userDao" /></bean>  

5:注解方式
<!-- 采用注释的方式配置bean -->      <context:annotation-config />      <context:component-scan base-package="com.yeshun" />            <!-- 采用注释的方式配置 aop -->      <aop:aspectj-autoproxy />          <!-- 采用annotation的方式配置事务 -->      <tx:annotation-driven transaction-manager="transactionManager" /> <!-- 定义事务管理器 --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean>

此时在Service上需加上@Transactional注解,如下:

@Transactional配置修改该规则(有时候不需要修改该规则,比如save,update....)
@Transactional(noRollbackFor=RuntimeException.class)方法事物说明运行时异常进行回滚
@Transactional(RollbackFor=Exception.clas)
@Transactional(readyOnly=true)
@Transactional(timeout=100)默认30
@Transactional(isolation)数据库的隔离级别 (没怎么用过,也不懂)

@Transactional@Service("UserServiceImpl")public class UserServiceImpl implements UserService{private @Resource(name = "UserDaoImpl")UserDao userDao;public List<User> findAllUser() {// TODO Auto-generated method stubreturn userDao.findAllUser();}}