Hibernate4 + Ehcache 配置问题

1、遇到的问题：

Caused by: org.hibernate.cache.NoCacheRegionFactoryAvailableException: Second-level cache is used in the application, but property hibernate.cache.region.factory_class is not given, please either disable second level cache or set correct region factory class name to property hibernate.cache.region.factory_class (and make sure the second level cache provider, hibernate-infinispan, for example, is available in the classpath).
	at org.hibernate.cache.internal.NoCachingRegionFactory.buildTimestampsRegion(NoCachingRegionFactory.java:87)
	at org.hibernate.cache.spi.UpdateTimestampsCache.<init>(UpdateTimestampsCache.java:63)
	at org.hibernate.internal.CacheImpl.<init>(CacheImpl.java:72)
	at org.hibernate.engine.spi.CacheInitiator.initiateService(CacheInitiator.java:40)
	at org.hibernate.engine.spi.CacheInitiator.initiateService(CacheInitiator.java:35)
	at org.hibernate.service.internal.SessionFactoryServiceRegistryImpl.initiateService(SessionFactoryServiceRegistryImpl.java:91)
	at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:176)
	... 25 more

 解决办法：

在网上查了资料，了解hibernate4.0在hibernate.cfg.xml配置二级缓存和hibernate3.3有所不同,本例子用的是 Hibernate-core.4.1.7.Final+ ehcache-core.2.6.0，用query的话就要配置查询缓存喽

4.0配置如下：

<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.cache.region.factory_class ">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>

3.3配置如下：

<property name="hibernate.cache.use_second_level_cache">true</property>

<property name="cache.provider_class ">org.hibernate.cache.EhCacheProvider</property>

完整的二级缓存配置：配置之前先拷贝一个ehcache.xml文件到src文件下

 

1. hibernate.cfg.xml 设定： <property name="hibernate.cache.use_second_level_cache">true</property>
   <property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>
2. @Cache注解(由hibernate扩展提供)     @Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
3. 用load测试（二级缓存是SessionFactory级别的缓存）

需要在pom.xml中添加

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-ehcache</artifactId>
  <version>4.1.7.Final</version>
</dependency>

 否则会报错：

Unable to load class [org.hibernate.cache.ehcache.EhCacheRegionFactory]