Java中用Ehcache做缓存处理

曾经终败给现在 2022-06-11 03:53 118阅读 0赞

# Java中用Ehcache做缓存处理 #

具体创建项目就不多说了。本例是的idea的maven项目中做的测试。

## 1 添加依赖 ##

在pom.xml添加如下的依赖项

<dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache-core</artifactId>
            <version>2.6.6</version>
        </dependency>

## 2 添加配置文件ehcache.xml ##

ehcache.xml保存在src/main/resources/;内空如下：

<?xml version="1.0" encoding="UTF-8"?>
    <ehcache>
        
        
        
        <cache name="ehcache001"
               maxEntriesLocalHeap="10000"
               maxEntriesLocalDisk="1000"
               eternal="false"
               overflowToDisk="true"
               diskSpoolBufferSizeMB="20"
               timeToIdleSeconds="300"
               timeToLiveSeconds="600"
               memoryStoreEvictionPolicy="LFU"
               transactionalMode="off" />
        </ehcache>

## 3 添加缓存处理类,代码如下： ##

import net.sf.ehcache.Cache;
    import net.sf.ehcache.CacheManager;
    import net.sf.ehcache.Element;
    
    import java.net.URL;
    
    /**
     * Created by xxx on 2017/7/29.
     */
    public class EhCacheUtil {
        //ehcache.xml 保存在src/main/resources/
        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);
        }
    }

## 4 添加测试类代码如下： ##

import com.lfb.model.User;
    
    /**
     * Created by xxxon 2017/7/29.
     */
    public class EhcacheTest {
    
        public  static void TestCahce()
        {
            //string测试
            EhCacheUtil.getInstance().put("ehcache001","userEch","test001");
            String val = (String) EhCacheUtil.getInstance().get("ehcache001", "userEch");
            
            //object测试
            User user = new User();
            user.setUserId(1);
            user.setUserName("jack");
            EhCacheUtil.getInstance().put("ehcache001","userJack",user);
    
            User user2=(User) EhCacheUtil.getInstance().get("ehcache001", "userJack");
            String str="1";
            System.out.print(user2);
        }
    }

在入口方法main添加入口

EhcacheTest.TestCahce();

至此代码就ok了，运行测试，发现存取都ok

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