二级缓存

添加enhance jar 包

拷贝enhan。xml到src下

cfg。xml

 <property name="cache.use_second_level_cache">true</property>
  <property name="cache.provider_class">net.sf.ehcache.hibernate.EhCacheProvider</property>
   <property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>
    <property name="cache.use_query_cache">true</property>
 
 hbm <cache usage="read-write"/>

测试两个sessions

若出现javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial

删除hbm sessionfactory name