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@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)??3
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)什么意思??
谁有相关的帮助文档...
问题补充：讲的是不错...请问你有相关的帮助文档没...就是关于@Cache()的..
给个下载链接啥的..2010年8月29日 11:35
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从hibernate2.1开始ehcache已经作为hibernate的默认缓存方案（二级缓存方案 sessionfactory级别）， 在项目中有针对性的使用缓存将对性能的提升右很大的帮助。
要使用 Ehcache：需要一下步骤
一，classpath添加相应的jar（ehcache，commons-logging）
二，然后在hibernate.cfg.xml中配置
<property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="cache.use_second_level_cache">true</property>
<property name="cache.use_query_cache">true</property>
说明：如果没有配置<property name="cache.use_second_level_cache">true</property>(默认false) 将会产生根据单个id查询的情况（产生很多sql）。
三，为需要缓存的类添加缓存标示：
使用mapping文件时需要添加node ：
Java代码
@Entity
@Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
如果使用使用hibernate annoation是使用@Cache(usage=CacheConcurrencyStrategy.)标签，有5种可选的缓存方案：
1，CacheConcurrencyStrategy.NONE
不适用，默认
2. CacheConcurrencyStrategy.NONSTRICT_READ_WRITE
更新不频繁几个小时或更长
3，CacheConcurrencyStrategy.READ_ONLY
对于不发生改变的数据使用 [size=large][/size]
4，CacheConcurrencyStrategy.READ_WRITE
基于时间戳判定机制，，对于数据同步要求严格的情况，使用频繁
5，CacheConcurrencyStrategy.TRANSACTIONAL
运行在jta环境种，基于事务2010年8月29日 18:59
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