java中memcached作为hibernate的二级缓存

因项目的问题，需要用到服务器缓存技术，我们选择了分布式的memcached来作为hibernate的二级缓存，需要用的的jar包如下:
memcached-2.1.jar
hibernate-memcached-1.2.2.jar
spy-2.4.jar
另外还需要下载memcached服务器
我是集成了spring的，所以首先在spring中加入如下配置
                
                <prop key="hibernate.cache.use_second_level_cache">true</prop>
                
                <prop key="hibernate.cache.use_structured_entries">true</prop>
                
                <prop key="hibernate.cache.use_query_cache">true</prop>
                
                <prop key="hibernate.cache.provider_class">
                    com.googlecode.hibernate.memcached.MemcachedCacheProvider
                </prop>
                
                <prop key="hibernate.memcached.servers">localhost:11211 127.0.0.1:11211</prop>
                
                <prop key="hibernate.memcached.operationTimeout">60000</prop>
这样我们就配置了memcached来作为hibernate的二级缓存，当然我们的配置还没有完成，仅仅这样配置缓存是不会工作
接下来我们需要在需要缓存的实体对象的映射文件中加入缓存标签,即在.hbm.xml中加入<cache usage="read-write"/>记住，此配置只能配置在class里面，且需要配置在id之前，当然usage的策略还有几种，我就不一一介绍了
当然如果你使用的是jpa就需要在实体上加上@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)   的注解
如果你使用的是query的查询方式的话，你还需要做这样的设置query.setCacheable(true);
然后运行memcached   然后启动项目，如果看到一下信息，那么证明你配置成功了
2012-07-27 10:10:01.988 INFO net.spy.memcached.MemcachedConnection: Added {QA sa=localhost/127.0.0.1:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2012-07-27 10:10:01.988 INFO net.spy.memcached.MemcachedConnection: Added {QA sa=/127.0.0.1:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2012-07-27 10:10:01.988 INFO net.spy.memcached.MemcachedConnection: Connection state changed for sun.nio.ch.SelectionKeyImpl@1a9447c
2012-07-27 10:10:01.988 INFO net.spy.memcached.MemcachedConnection: Connection state changed for sun.nio.ch.SelectionKeyImpl@1dba6e2

补充：软件开发 , Java ,