Spring学习之缓存机制EhCache

来源：互联网发布：太师鞭知乎编辑：程序博客网时间：2024/05/21 21:33

整体代码结构：

User.java

package com.kinsey.woo.dto;public class User {private String name;private int age;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public User(String name, int age) {super();this.name = name;this.age = age;}}

UserService.java

package com.kinsey.woo.service;import com.kinsey.woo.dto.User;public interface UserService {public User getUserByNameAndAge(String name,int age);public User getAntherUser(String name, int age);}

UserServiceImpl.java

package com.kinsey.woo.service.impl;import org.springframework.cache.annotation.Cacheable;import org.springframework.stereotype.Service;import com.kinsey.woo.dto.User;import com.kinsey.woo.service.UserService;@Service("userService")@Cacheable(value="users")public class UserServiceImpl implements UserService {public User getUserByNameAndAge(String name,int age){System.out.print("getUserByNameAndAge is called...\n");return new User(name,age);}@Overridepublic User getAntherUser(String name, int age) {System.out.println("getAntherUser is called...\n");return new User(name,age);}}

ehcache.xml

<?xml version="1.0" encoding="UTF-8"?><ehcache> 4     <!--  5         磁盘存储:将缓存中暂时不使用的对象,转移到硬盘,类似于Windows系统的虚拟内存 6         path:指定在硬盘上存储对象的路径 7      --> 8     <diskStore path="java.io.tmpdir" /> 9 10     11     <!-- 12         defaultCache:默认的缓存配置信息,如果不加特殊说明,则所有对象按照此配置项处理13         maxElementsInMemory:设置了缓存的上限,最多存储多少个记录对象14         eternal:代表对象是否永不过期15         timeToIdleSeconds:最大的发呆时间16         timeToLiveSeconds:最大的存活时间17         overflowToDisk:是否允许对象被写入到磁盘18      -->19     <defaultCache maxElementsInMemory="10000" eternal="false"  timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="true"maxElementsOnDisk="120000"diskExpiryThreadIntervalSeconds="120"memoryStoreEvictionPolicy="LRU" />21     22     <!-- 23         cache:为指定名称的对象进行缓存的特殊配置24         name:指定对象的完整名25      -->26     <cache name="users" maxElementsInMemory="10000"  eternal="false" timeToIdleSeconds="300"     timeToLiveSeconds="600"     overflowToDisk="true" />28 29 30 </ehcache>

application.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:cache="http://www.springframework.org/schema/cache"xsi:schemaLocation="http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.3.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"><bean id="ehCacheManger" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"p:configLocation="classpath:ehcache.xml"/><bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager" p:cacheManager-ref="ehCacheManger"/><context:component-scan base-package="com.kinsey.woo.service"></context:component-scan><cache:annotation-driven cache-manager="cacheManager"/></beans>

RunMain.java

package com.kinsey.woo.main;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.kinsey.woo.dto.User;import com.kinsey.woo.service.UserService;public class RunMain {public static void main(String[] args) {@SuppressWarnings("resource")ApplicationContext ctx = new ClassPathXmlApplicationContext("application.xml");UserService userService = ctx.getBean("userService", UserService.class);User u1 = userService.getUserByNameAndAge("Godwin", 10);User u2 = userService.getAntherUser("Godwin", 10);if(u1==u2){System.out.print("u1=u2 \n");}}}

jar:

ehcache-core-2.6.11.jar

slf4j-api-1.7.25.jar

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