SpringMvc整合ehcaech

1、web.xml配置

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"    id="WebApp_ID" version="2.5">    <display-name>fbd-web</display-name>    <welcome-file-list>        <welcome-file>/common/index.html</welcome-file>    </welcome-file-list>    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath*:fbd/*/spring/applicationContext*.xml</param-value>    </context-param>    <!-- struts config begin -->    <servlet>        <servlet-name>springmvc</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>                classpath:fbd/core/spring/springmvc-servlet.xml,                classpath:fbd/web/spring/springmvc-servlet.xml            </param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>springmvc</servlet-name>        <url-pattern>*.html</url-pattern>    </servlet-mapping>    <!-- struts config end -->    <filter>        <filter-name>UrlRewriteFilter</filter-name>        <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>UrlRewriteFilter</filter-name>        <url-pattern>/*</url-pattern>        <dispatcher>REQUEST</dispatcher>        <dispatcher>FORWARD</dispatcher>    </filter-mapping>    <!-- dbcp config begin -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!-- spring encoding -->    <filter>        <filter-name>Spring character encoding filter</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <init-param>            <param-name>encoding</param-name>            <param-value>UTF-8</param-value>        </init-param>        <init-param>            <param-name>forceEncoding</param-name>            <param-value>true</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>Spring character encoding filter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- spring log -->    <!-- spring config end -->    <mime-mapping>        <extension>doc</extension>        <mime-type>application/msword</mime-type>    </mime-mapping>    <mime-mapping>        <extension>xls</extension>        <mime-type>application/msexcel</mime-type>    </mime-mapping>    <mime-mapping>        <extension>pdf</extension>        <mime-type>application/pdf</mime-type>    </mime-mapping>    <session-config>        <session-timeout>30</session-timeout>    </session-config></web-app>

2、applicationContext-config.xml

 <?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:aop="http://www.springframework.org/schema/aop"    xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="            http://www.springframework.org/schema/beans            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd            http://www.springframework.org/schema/tx               http://www.springframework.org/schema/tx/spring-tx-3.1.xsd             http://www.springframework.org/schema/context            http://www.springframework.org/schema/context/spring-context-3.1.xsd            http://www.springframework.org/schema/aop            http://www.springframework.org/schema/aop/spring-aop-3.1.xsd"><!-- 启用缓存注解功能(请将其配置在Spring主配置文件中) -->    <cache:annotation-driven cache-manager="cacheManager" />    <!-- Spring自己的基于java.util.concurrent.ConcurrentHashMap实现的缓存管理器(该功能是从Spring3.1开始提供的) -->    <!-- <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">         <property name="caches"> <set> <bean name="myCache" class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean"/>         </set> </property> </bean> -->    <!-- 若只想使用Spring自身提供的缓存器,则注释掉下面的两个关于Ehcache配置的bean,并启用上面的SimpleCacheManager即可 -->    <!-- Spring提供的基于的Ehcache实现的缓存管理器 -->    <bean id="cacheManagerFactory"        class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">        <property name="configLocation" value="classpath:ehcache.xml" />    </bean>    <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">        <property name="cacheManager" ref="cacheManagerFactory" />    </bean></beans>

3、applicationContext-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"      updateCheck="false">   -->    <!--          name:cache唯一标识           eternal：缓存是否永久有效           maxElementsInMemory：内存中最大缓存对象数          overflowToDisk(true,false)：缓存对象达到最大数后，将缓存写到硬盘中          diskPersistent：硬盘持久化          timeToIdleSeconds：缓存清除时间           timeToLiveSeconds：缓存存活时间          memoryStoreEvictionPolicy：缓存清空策略          1.FIFO：first in first out 先讲先出          2.LFU： Less Frequently Used 一直以来最少被使用的          3.LRU：Least Recently Used  最近最少使用的       -->  <!--     <defaultCache maxElementsInMemory="1000" eternal="false"          timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="false" />    <cache name="infoCache" eternal="false" maxElementsInMemory="1000"          overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="3600"          timeToLiveSeconds="3600" memoryStoreEvictionPolicy="LFU" />  </ehcache> --><!-- Ehcache2.x的变化(取自https://github.com/springside/springside4/wiki/Ehcache) -->  <!-- 1)最好在ehcache.xml中声明不进行updateCheck -->  <!-- 2)为了配合BigMemory和Size Limit,原来的属性最好改名 -->  <!--   maxElementsInMemory->maxEntriesLocalHeap -->  <!--   maxElementsOnDisk->maxEntriesLocalDisk -->  <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"      updateCheck="false">      <diskStore path="java.io.tmpdir"/>      <defaultCache             maxElementsInMemory="1000"             eternal="false"             timeToIdleSeconds="120"             timeToLiveSeconds="120"             overflowToDisk="false"/>      <cache name="userCache"             maxElementsOnDisk="20000"             maxElementsInMemory="2000"             eternal="true"             overflowToDisk="true"             diskPersistent="true"/>  </ehcache> <!--  <diskStore>==========当内存缓存中对象数量超过maxElementsInMemory时,将缓存对象写到磁盘缓存中(需对象实现序列化接口)  <diskStore path="">==用来配置磁盘缓存使用的物理路径,Ehcache磁盘缓存使用的文件后缀名是*.data和*.index  name=================缓存名称,cache的唯一标识(ehcache会把这个cache放到HashMap里)  maxElementsOnDisk====磁盘缓存中最多可以存放的元素数量,0表示无穷大  maxElementsInMemory==内存缓存中最多可以存放的元素数量,若放入Cache中的元素超过这个数值,则有以下两种情况                       1)若overflowToDisk=true,则会将Cache中多出的元素放入磁盘文件中                       2)若overflowToDisk=false,则根据memoryStoreEvictionPolicy策略替换Cache中原有的元素  eternal==============缓存中对象是否永久有效,即是否永驻内存,true时将忽略timeToIdleSeconds和timeToLiveSeconds  timeToIdleSeconds====缓存数据在失效前的允许闲置时间(单位:秒),仅当eternal=false时使用,默认值是0表示可闲置时间无穷大,此为可选属性                       即访问这个cache中元素的最大间隔时间,若超过这个时间没有访问此Cache中的某个元素,那么此元素将被从Cache中清除  timeToLiveSeconds====缓存数据在失效前的允许存活时间(单位:秒),仅当eternal=false时使用,默认值是0表示可存活时间无穷大                       即Cache中的某元素从创建到清楚的生存时间,也就是说从创建开始计时,当超过这个时间时,此元素将从Cache中清除  overflowToDisk=======内存不足时,是否启用磁盘缓存(即内存中对象数量达到maxElementsInMemory时,Ehcache会将对象写到磁盘中)                       会根据标签中path值查找对应的属性值,写入磁盘的文件会放在path文件夹下,文件的名称是cache的名称,后缀名是data  diskPersistent=======是否持久化磁盘缓存,当这个属性的值为true时,系统在初始化时会在磁盘中查找文件名为cache名称,后缀名为index的文件                       这个文件中存放了已经持久化在磁盘中的cache的index,找到后会把cache加载到内存                       要想把cache真正持久化到磁盘,写程序时注意执行net.sf.ehcache.Cache.put(Element element)后要调用flush()方法  diskExpiryThreadIntervalSeconds==磁盘缓存的清理线程运行间隔,默认是120秒  diskSpoolBufferSizeMB============设置DiskStore（磁盘缓存）的缓存区大小,默认是30MB  memoryStoreEvictionPolicy========内存存储与释放策略,即达到maxElementsInMemory限制时,Ehcache会根据指定策略清理内存                                   共有三种策略,分别为LRU(最近最少使用)、LFU(最常用的)、FIFO(先进先出)  -->

4、测试代码

package com.fbd.core.app.ehcache.dao.impl;import net.sf.ehcache.CacheManager;import net.sf.ehcache.Element;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import com.fbd.core.app.ehcache.dao.IEhcacheDao;@Repository(value="ehcacheDao")public class EhcacheDaoImpl implements IEhcacheDao {    /*@Autowired    private CacheManager cacheManager;    public void set(String key,String value){        System.out.println("============================");        this.cacheManager.getCache("userCache").put(new Element(key,value));        System.out.println("============================");    }    public Element get(String key){        return this.cacheManager.getCache("userCache").get(key);    }    public String getValue(String key){        Element element = this.cacheManager.getCache("userCache").get(key);        if(element!=null){            return element.getValue().toString();        }        return "";    }    @Override    public void set(String key, Object object) {    }*/}