【Spring__ehcache 】ehcache简单使用

1、配置文件

        <ehcache.version>2.6.11</ehcache.version>
        <ehcache-web.version>2.0.4</ehcache-web.version>

        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache-core</artifactId>
            <version>${ehcache.version}</version>
        </dependency>
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache-web</artifactId>
            <version>${ehcache-web.version}</version>
        </dependency>

    <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
        <property name="configLocation" value="classpath:xml/ehcache-local.xml"/>
    </bean>

ehcache-local.xml

<?xml version="1.0" encoding="UTF-8"?>
<ehcache updateCheck="false" name="defaultCache">
    <diskStore path="../temp/ehcache"/>
    <!-- 默认缓存配置. 自动失效：最后一次访问时间间隔300秒失效，若没有访问过自创建时间600秒失效。-->
    <defaultCache maxEntriesLocalHeap="1000" eternal="false" timeToIdleSeconds="300" timeToLiveSeconds="600"
                  overflowToDisk="true" statistics="true"/>
    <cache name="cache01"
           maxElementsInMemory="1000"
           eternal="false"
           overflowToDisk="false"
           timeToIdleSeconds="60"
           timeToLiveSeconds="60"
           memoryStoreEvictionPolicy="LRU"/>
    <cache name="sysCache" maxEntriesLocalHeap="1000" eternal="true" overflowToDisk="true" statistics="true"/>
    <!-- 简单页面缓存 -->
    <cache name="pageCachingFilter" maxEntriesLocalHeap="1000" eternal="false" timeToIdleSeconds="120"
           timeToLiveSeconds="120" overflowToDisk="true" memoryStoreEvictionPolicy="LFU" statistics="true"/>
    <!-- 系统活动会话缓存 -->
    <cache name="activeSessionsCache" maxEntriesLocalHeap="10000" eternal="true" overflowToDisk="true"
           diskPersistent="true" diskExpiryThreadIntervalSeconds="600" statistics="true"/>
</ehcache>

2、CacheUtils

SpringContextHolder

package com.kikyo.util;

import com.kikyo.listener.SpringContextHolder;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Cache;
import net.sf.ehcache.Element;

public class CacheUtils {
    // private static CacheManager cacheManager = SpringContextHolder.getBean("cacheManager");//都可以
    private static CacheManager cacheManager = SpringContextHolder.getBean(CacheManager.class);
    private static final String SYS_CACHE = "cache01";

    public static Object get(String key) {
        return get(SYS_CACHE, key);
    }

    public static void put(String key, Object value) {
        put(SYS_CACHE, key, value);
    }

    public static Object get(String cacheName, String key) {
        Cache cache = getCache(cacheName);
        Element element = cache.get(key);
        return element == null ? null : element.getObjectValue();
    }

    public static void put(String cacheName, String key, Object value) {
        Element element = new Element(key, value);
        Cache cache = getCache(cacheName);
        cache.put(element);
    }

    public static void remove(String key) {
        remove(SYS_CACHE, key);
    }

    public static void remove(String cacheName, String key) {
        getCache(cacheName).remove(key);
    }

    private static Cache getCache(String cacheName) {
        Cache cache = cacheManager.getCache(cacheName);
        if (cache == null) {
            throw new RuntimeException("当前系统中没有定义“" + cacheName + "”这个缓存。");
        }
        return cache;
    }
}