總體思路：使用Hibernate3.2的二級緩存，解決使用頻率最多的find(Class clz,Object id)方法的緩存。

一、使用Hibernate3.2的二級緩存功能，只開取針對id查找實體的緩存，不開啟基于list查詢的緩存。
技術調整如下：
1、升級Spring2的版本號，升級為2.06，更新spring.jar、spring-aspects.jar、spring-mock.jar，為了使用spring modules中提供的cache功能，增加了spring-modules-cache.jar。以上包已經添加到svn中。

2、修改jpa-base.xml中的entityManagerFactory Bean的配置信息，把對loadTimeWeaver屬性的注入注釋掉。

BEAN class =org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean name ="entityManagerFactory" > BEAN >
property name ="persistenceXmlLocation" value ="classpath:persistence.xml" > property >
property name ="dataSource" ref ="dataSource" > property >
property name ="jpaVendorAdapter" >
BEAN class =org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter>
<property><span style="COLOR: #0000ff">="database"</span><span style="COLOR: #ff0000">value</span><span style="COLOR: #0000ff">="MYSQL"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="showSql"</span><span style="COLOR: #ff0000">value</span><span style="COLOR: #0000ff">="false"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="generateDdl"</span><span style="COLOR: #ff0000">value</span><span style="COLOR: #0000ff">="false"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"></span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #008000"><!--</span><span style="COLOR: #008000"><br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" /><propertyname="loadTimeWeaver"><br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" /><bean<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />class="org.springframework.instrument.classloading.SimpleLoadTimeWeaver"/><br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" /></property></span><span style="COLOR: #008000">--></span><span style="COLOR: #000000"></span></span></span></property>

在persistence.xml文件中，添加如下的配置信息，開啟Hibernate的二級緩存：

property name ="hibernate.cache.provider_class" value ="org.hibernate.cache.EhCacheProvider" > property >
property name ="hibernate.cache.use_query_cache" value ="false" > property > <!--</span><span style="COLOR: #008000">暫時不開querycache</span><span style="COLOR: #008000">-->

3、在src目錄下增加ehcache.xml，設置cache的配置信息，默認情況下可以考慮給一些常用的Entity類設置一個單獨的cache區域，如下所示：

CACHE name ="com.easyjf.security.Resource" maxelementsinmemory ="1000" eternal ="false" overflowtodisk ="false" memorystoreevictionpolicy ="LFU" > CACHE >
<!--</span><span style="COLOR: #008000">配置信息的說明如下：<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />缺省緩存配置。CacheManager會把這些配置應用到程序中。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />下列屬性是defaultCache必須的：<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" /><br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />maxInMemory-設定內存中創建對象的最大值。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />eternal-設置元素（譯注：內存中對象）是否永久駐留。如果是，將忽略超<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />時限制且元素永不消亡。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />timeToIdleSeconds-設置某個元素消亡前的停頓時間。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />也就是在一個元素消亡之前，兩次訪問時間的最大時間間隔值。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />這只能在元素不是永久駐留時有效（譯注：如果對象永恒不滅，則<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />設置該屬性也無用）。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />如果該值是0就意味著元素可以停頓無窮長的時間。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />timeToLiveSeconds-為元素設置消亡前的生存時間。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />也就是一個元素從構建到消亡的最大時間間隔值。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />這只能在元素不是永久駐留時有效。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />overflowToDisk-設置當內存中緩存達到maxInMemory限制時元素是否可寫到磁盤<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" />上。<br /><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top" /></span><span style="COLOR: #008000">-->

4、然后修改Domain對象，對于要使用緩存的的Entity，在類聲明前加上如下的標簽： BR > @Cache( usage = CacheConcurrencyStrategy .NONSTRICT_READ_WRITE)，此處usage的值還需要根據應用情況進行必要的調整。 BR > P > P > 5、暫時使用ehcache作為Springmodules的cache。在ehcache.xml文件中繼續配置用于為spring提供方法調用結果的緩存。大致如下：

<!--</span><span style="COLOR: #008000">以下是為Spring提供的方法調用結果緩存</span><span style="COLOR: #008000">-->

CACHE name ="CMSCache" maxelementsinmemory ="5000" eternal ="false" overflowtodisk ="true" memorystoreevictionpolicy ="LFU" > CACHE >
CACHE name ="ECCache" maxelementsinmemory ="5000" eternal ="false" overflowtodisk ="true" memorystoreevictionpolicy ="LFU" > CACHE >

6、然后在具體的Service類中配置緩存。使用了AOP,需要修改spring的配置文件，比如cms-core.xml中為了給ICmsManageService的get*方法添加結果緩存，調整如下：

EHCACHE:PROXY id =cmsManageService>
<bean><span style="COLOR: #0000ff">=com.easyjf.cms.service.impl.CmsManageServiceImpl&gt;</span></bean>
<property><span style="COLOR: #0000ff">="newsAuthorDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsAuthorDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="newsDocDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsDocDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="newsDirDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsDirDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="newsSourceDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsSourceDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="reviewDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsRivewDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">EHCACHE:CACHING</span><span style="COLOR: #ff0000">cachename</span><span style="COLOR: #0000ff">="CMSCache"</span><span style="COLOR: #ff0000">methodname</span><span style="COLOR: #0000ff">="get*"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">EHCACHE:CACHING</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">EHCACHE:FLUSHING</span><span style="COLOR: #ff0000">methodname</span><span style="COLOR: #0000ff">="update*"</span><span style="COLOR: #ff0000">cachenames</span><span style="COLOR: #0000ff">="CMSCache"</span><span style="COLOR: #ff0000">when</span><span style="COLOR: #0000ff">="before"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">EHCACHE:FLUSHING</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"></span><span style="COLOR: #800000">EHCACHE:PROXY</span><span style="COLOR: #0000ff">&gt;</span></span></span></span></span></span></span></property>

調整前對照：

BEAN class =com.easyjf.cms.service.impl.CmsManageServiceImpl id =cmsManageService>
<property><span style="COLOR: #0000ff">="newsAuthorDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsAuthorDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="newsDocDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsDocDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="newsDirDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsDirDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="newsSourceDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsSourceDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"><br><img alt="" src="http://www.blogjava.net/Images/OutliningIndicators/None.gif" align="top"></span><span style="COLOR: #0000ff"><span style="COLOR: #800000">property</span><span style="COLOR: #ff0000">name</span><span style="COLOR: #0000ff">="reviewDao"</span><span style="COLOR: #ff0000">ref</span><span style="COLOR: #0000ff">="newsRivewDao"</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #800000">property</span><span style="COLOR: #0000ff">&gt;</span><span style="COLOR: #000000"></span></span></span></span></span></property>

為了讓Spring配置文件能識別并處理 EHCACHE:XXX > 這個標簽，需要在beans中進行schem聲明，如下所示： BR > 另外在spring配置文件中再增加 EHCACHE:CONFIG configlocation = "classpath:ehcache.xml" > EHCACHE:CONFIG > ,以便Spring能找到Cache配置文件。 EHCACHE:XXX >

BEANS xmlns ="http://www.springframework.org/schema/beans" xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop ="http://www.springframework.org/schema/aop" xmlns:tx ="http://www.springframework.org/schema/tx" xmlns:ehcache ="http://www.springmodules.org/schema/ehcache" xsi:schemalocation ="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springmodules.org/schema/ehcachehttp://www.springmodules.org/schema/cache/springmodules-ehcache.xsd" > BEANS >

7、以上只是基本的配置，cache運行的具體性能，還需要根據實際的數據量及并發量等進行更加細致的調整。

8、另外EasyJWeb還將會提供一個頁面結果緩存，直接緩存Action的執行結果，這樣就可以解決訪問得最多，屬于嚴重性能瓶頸的問題。比如ec-brand.ejf、index.ejf等。這一功能將在9月15號前推出。

9、一些必要的頁面，需要增加靜態文件生成功能。(逐漸調整)

注釋：

　　由于發現Spring2.06版本與當前我們使用的版本存在一些沖突。而且跟EasyJWeb中的maven混合編譯的時候存在一些問題，因此暫時取消使用Spring的方法Cache，而只使用Hibernate的Cache及EasyJWeb的緩存配合。EasyJWeb的緩存簡單機制已經實現，直接在基于AbstractCmdAction的Action中，在要緩存的Command中使用緩存標簽@WebCache即可。

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