Hibernate事务属性
事务也是Hibernate持久层访问的重要方面，Hibernate不仅提供了局部事务支持，也允许使用容器管理的全局事务。Hibernate关于事务管
事务也是Hibernate持久层访问的重要方面，Hibernate不仅提供了局部事务支持，也允许使用容器管理的全局事务。Hibernate关于事务管理的属性有如下几个。
hibernate.transaction.factory_class：指定Hibernate所用的事务工厂的类型，该属性值必须是TransactionFactory的直接或间接子类。
jta.UserTransaction：该属性值是一个JNDI名，Hibernate将使用JTATransactionFactory从应用服务器获取JTA UserTransaction。
hibernate.transaction.manager_lookup_class：该属性值应为一个TransactionManagerLookup类名，，当使用JVM级别的缓存时，或在JTA环境中使用hilo生成器策略时，需要该类。
hibernate.transaction.flush_before_completion：指定Session是否在事务完成后自动将数据刷新（flush）到底层数据库。该属性值只能为true或false。现在更好的方法是使用Context相关的Session管理。
hibernate.transaction.auto_close_session：指定是否在事务结束后自动关闭Session。该属性值只能是true或false。现在更好的方法是使用Context相关的Session管理。
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