springboot本地缓存ehcache存取数据，cacheable缓存

╰+哭是因爲堅強的太久メ 2021-11-02 00:04 642阅读 0赞

直接上代码，原来自己看

1、在resource下新建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">
        <diskStore path="java.io.tmpdir/Tmp_EhCache" />
    
        
        
        
        
        
        
        
        
        
        <defaultCache
                eternal="false"
                maxElementsInMemory="1000"
                overflowToDisk="false"
                diskPersistent="false"
                timeToIdleSeconds="120"
                timeToLiveSeconds="120"
                memoryStoreEvictionPolicy="LRU" />
    
        
        
        <cache
                name="institutionNo"
                eternal="false"
                maxElementsInMemory="1000"
                overflowToDisk="false"
                diskPersistent="false"
                timeToIdleSeconds="120"
                timeToLiveSeconds="120"
                memoryStoreEvictionPolicy="LRU" />
    </ehcache>

2、新建EhcacheUtil.java通用方法类

package com.goldpac.ocs.business.merchantservice.config;
    import java.net.URL;
    import net.sf.ehcache.Cache;
    import net.sf.ehcache.CacheManager;
    import net.sf.ehcache.Element;
    
    public class EhcacheUtil {
        private static final String path = "/ehcache.xml";
    
        private URL url;
    
        private CacheManager manager;
    
        private static EhcacheUtil ehCache;
    
        private EhcacheUtil(String path) {
        url = getClass().getResource(path);
        manager = CacheManager.create(url);
        }
    
        public static EhcacheUtil getInstance() {
            if (ehCache== null) {
            ehCache= new EhcacheUtil(path);
            }
            return ehCache;
    }
    
        public void put(String cacheName, String key, Object value) {
            Cache cache = manager.getCache(cacheName);
            Element element = new Element(key, value);
            cache.put(element);
        }
    
        public Object get(String cacheName, String key) {
            Cache cache = manager.getCache(cacheName);
            Element element = cache.get(key);
        return element == null ? null : element.getObjectValue();
        }
    
        public Cache get(String cacheName) {
        return manager.getCache(cacheName);
    }
    
        public void remove(String cacheName, String key) {
            Cache cache = manager.getCache(cacheName);
            cache.remove(key);
        }
    }

3、导入jar包

<dependency>
                <groupId>net.sf.ehcache</groupId>
                <artifactId>ehcache-core</artifactId>
                <version>2.4.3</version>
                <scope>compile</scope>
            </dependency>

4、service中调用

//获取缓存数据institutionNo为ehcache.xml中配置的name,no为获取缓存的数据key（我的no为变量）

Object institutionNo = EhcacheUtil.getInstance().get("institutionNo", no);

//添加缓存数据institutionNo为ehcache.xml中配置的name,no为缓存的数据的key，no2为缓存的value（我的no为变量）

EhcacheUtil.getInstance().put("institutionNo", no, no2);

另附一篇cacheable缓存，我的理解是，没有就执行方法并缓存结果，有就直接返回缓存，，

[https://blog.csdn.net/zhuyu19911016520/article/details/81946202][https_blog.csdn.net_zhuyu19911016520_article_details_81946202]

[https_blog.csdn.net_zhuyu19911016520_article_details_81946202]: https://blog.csdn.net/zhuyu19911016520/article/details/81946202