i config hibernate.cfg.xml like this:

<property name="cache.use_query_cache">true</property>
<property name="cache.provider_class">net.sf.hibernate.cache.OSCacheProvider
</property>

and copy the ehcache.xml like this:

<ehcache>
<diskStore path="java.io.tmpdir"/>
<defaultCache
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"
/>
<cache name="sampleCache1"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
overflowToDisk="true"
/>
<cache name="sampleCache2"
maxElementsInMemory="1000"
eternal="true"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="false"
/>
</ehcache>

but it not work

net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.ehcache.hibernate.Provider

the xml in classes dir
the ehcache.jar in lib dir

are you sure this line is ok? shouldn't you put ehCache here?