EhCache是一个纯Java的进程内缓存框架,具有快速、精干等特点,是 Hibernate 中默认的 CacheProvider。
Ehcache是一种广泛使用的开源Java分布式缓存。主要面向通用缓存,Java EE和轻量级容器。它具有内存和磁盘存储,缓存加载器,缓存扩展,缓存异常处理程序,一个gzip缓存servlet过滤器,支持REST和SOAP api等特点。
下图是 EhCache 在应用程序中的位置:
主要特性有:
1. 快速、精干;
2. 简单;
3. 多种缓存策略;
4. 缓存数据有两级:内存和磁盘,因此无需担心容量问题;
5. 缓存数据会在虚拟机重启的过程中写入磁盘;
6. 可以通过 RMI、可插入 API 等方式进行分布式缓存;
7. 具有缓存和缓存管理器的侦听接口;
8. 支持多缓存管理器实例,以及一个实例的多个缓存区域;
9. 提供 Hibernate 的缓存实现;
下面演示EhCache与spring集成配置。
1.引入依赖jar包
<dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>2.10.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>4.1.6.RELEASE</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.5.8</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.5.8</version> </dependency>2.EhCache配置
ehcache.xml
<?xml version="1.0" encoding="UTF-8"?> <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"> <diskStore path="java.io.tmpdir/ehcache" /> <!-- 默认缓存 --> <defaultCache maxElementsInMemory="1000" eternal="true" timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="true" diskSpoolBufferSizeMB="30" maxElementsOnDisk="10000000" diskPersistent="true" diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU"> </defaultCache> <!-- demo缓存 --> <cache name="demoCache" maxElementsInMemory="1000" eternal="false" timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="true" diskSpoolBufferSizeMB="30" maxElementsOnDisk="10000000" diskPersistent="false" diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU"> </cache> </ehcache>3.spring配置
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" 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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd" default-autowire="byName" default-lazy-init="false"> <!-- 引用ehCache的配置 --> <bean id="defaultCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation"> <value>classpath:ehcache.xml</value> </property> </bean> <!-- 定义ehCache的工厂,并设置所使用的Cache name --> <bean id="ehCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean"> <property name="cacheManager"> <ref local="defaultCacheManager" /> </property> <property name="cacheName"> <value>demoCache</value> </property> </bean> </beans>4.测试demo
package cn.slimsmart.ehcache; import java.io.BufferedReader; import java.io.InputStreamReader; import net.sf.ehcache.Cache; import net.sf.ehcache.Element; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class EhcacheTest { public static void main(String[] args) throws Exception { ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); Cache ehCache = (Cache)context.getBean("ehCache"); ehCache.put(new Element("key", "value")); ehCache.put(new Element("key1", "aaaa", 0, 10)); BufferedReader strin=new BufferedReader(new InputStreamReader(System.in)); String line=null; while ((line=strin.readLine())!=null && !"exit".equals(line)) { String[] ss = line.split("\\s+"); if(ss.length==1){ System.out.println(ehCache.get(ss[0])); }else if (ss.length==2){ ehCache.put(new Element(ss[0],ss[1])); System.out.println("ok"); } } strin.close(); } }
1.Ehcache 整合Spring 使用页面、对象缓存
2.spring+ehCache简单整合使用示例
3.Ehcache整合spring配置