Spring声明式事务配置与使用

1、配置:

<context:component-scan base-package="com.vrvwh.wh01" />
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close">
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="maxActive" value="50" />
<property name="initialSize" value="1" />
<property name="maxWait" value="60000" />
<property name="minIdle" value="1" />
<property name="timeBetweenEvictionRunsMillis" value="3000" />
<property name="minEvictableIdleTimeMillis" value="300000" />
<property name="validationQuery" value="SELECT 'x' FROM DUAL" />
<property name="testWhileIdle" value="true" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<!-- mysql 不支持 poolPreparedStatements -->
<!--<property name="poolPreparedStatements" value="true" /> -->
<!--<property name="maxPoolPreparedStatementPerConnectionSize" value="20"
/> -->
<!-- 开启Druid的监控统计功能 -->
<property name="filters" value="stat" />
</bean> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource" />
</bean> <bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan">
<list>
<value>com.vrvwh.wh01.domain</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=${dialect}
hibernate.show_sql=${hibernate.show_sql}
hibernate.hbm2ddl.auto=${hibernate.hbm2ddl.auto}
cache.provider_class=${hibernate.cache.provider_class}
cache.use_second_level_cache=${hibernate.cache.use_second_level_cache}
cache.use_query_cache=${hibernate.cache.use_query_cache}
hibernate.jdbc.batch_size=${hibernate.jdbc.batch_size}
</value>
</property>
</bean> <!-- 配置Hibernate事务管理器 -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 配置事务异常封装 -->
<bean id="persistenceExceptionTranslationPostProcessor"
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<tx:annotation-driven transaction-manager="transactionManager"/>

2、使用

public Session getCurrentSession() {
return sessionFactory.getCurrentSession();
} public Serializable save(T instance) {
return getCurrentSession().save(instance);
}

注意:

sessionFactory.getCurrentSession() 才能在事务中运行

在单独使用不带任何参数的 @Transactional 注释时,传播模式要设置为 REQUIRED,只读标志设置为 false,事务隔离级别设置为 READ_COMMITTED,而且事务不会针对受控异常(checked exception)回滚。

事务使用陷进:http://www.ibm.com/developerworks/cn/java/j-ts1.html
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