目前已经了解hibernate一级缓存基于session的，二级缓存基于sessionFactory的可以配置是否启用。两者提供的方法也是差不多，有查询会先找一级缓存，再找二级缓存，之后去数据库。好像有些项目是用了hibernate的缓存，为什么还要使用ehcache缓存技术？
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There are many options for hibernate's second-level cache. ehcache is the default implementation. You can use other options. Just implement the CacheProvider interface.
hibernate's second-level cache only needs to implement its interface, and you can customize it.
ehcache is one of the implementation solutions of hibernate second-level cache
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There are many options for hibernate's second-level cache. ehcache is the default implementation. You can use other options. Just implement the CacheProvider interface.
hibernate's second-level cache only needs to implement its interface, and you can customize it.
ehcache is one of the implementation solutions of hibernate second-level cache