EHCache支持内存和磁盘的缓存,支持LRU、LFU和FIFO多种淘汰算法,支持分布式的Cache,可以作为Hibernate的缓存插件。同时它也能提供基于Filter的Cache,该Filter可以缓存响应的内容并采用Gzip压缩提高响应速度。
可以通过spring集成提供缓存管理,spring为ehcache提供了如下的实现类:
EhCacheCache实现Cache接口
EhCacheCacheManager实现CacheManager接口
EhCache工厂管理类
EhCacheFactoryBean
EhCacheManagerFactoryBean
1.引入ehcache jar包
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core</artifactId>
<version>2.6.6</version>
</dependency>
2.ehcache配置
<?xml version=”1.0″ encoding=”UTF-8″?>
<ehcache xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xsi:noNamespaceSchemaLocation=”ehcache.xsd” updateCheck=”true”
monitoring=”autodetect”>
<!– <diskStore path=”java.io.tmpdir” /> –>
<diskStore path=”C:/cache_tmpdir” />
<defaultCache maxElementsInMemory=”10000″ eternal=”false”
timeToIdleSeconds=”120″ timeToLiveSeconds=”120″ overflowToDisk=”true”
maxElementsOnDisk=”10000000″ diskPersistent=”false”
diskExpiryThreadIntervalSeconds=”120″ memoryStoreEvictionPolicy=”LRU” />
<cache name=”userCache” maxElementsInMemory=”10000″
maxElementsOnDisk=”1000″ eternal=”false” overflowToDisk=”true”
diskSpoolBufferSizeMB=”20″ timeToIdleSeconds=”300″ timeToLiveSeconds=”600″
memoryStoreEvictionPolicy=”LFU” />
</ehcache>
3.spring配置
<beans xmlns=”http://www.springframework.org/schema/beans”
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns:cache=”http://www.springframework.org/schema/cache”
xmlns:p=”http://www.springframework.org/schema/p”
xsi:schemaLocation=”http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd”>
<!– 启用缓存注解功能,这个是必须的,否则注解不会生效,另外,该注解一定要声明在spring主配置文件中才会生效 –>
<cache:annotation-driven cache-manager=”cacheManager” />
<bean id=”userService” class=”org.springframework.cache.demo.UserService” />
<!– cacheManager工厂类,指定ehcache.xml的位置 –>
<bean id=”cacheManagerFactory”
class=”org.springframework.cache.ehcache.EhCacheManagerFactoryBean”
p:configLocation=”classpath:ehcache.xml” />
<!– 声明cacheManager –>
<bean id=”cacheManager” class=”org.springframework.cache.ehcache.EhCacheCacheManager”
p:cacheManager-ref=”cacheManagerFactory” />
</beans>
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