ehcache3 简单使用

小咪咪 2022-04-13 14:46 155阅读 0赞

## maven ##

<dependency>
            <groupId>org.ehcache</groupId>
            <artifactId>ehcache</artifactId>
            <version>3.6.2</version>
        </dependency>

## 代码 ##

import org.ehcache.Cache;
    import org.ehcache.CacheManager;
    import org.ehcache.config.CacheConfiguration;
    import org.ehcache.config.builders.CacheConfigurationBuilder;
    import org.ehcache.config.builders.CacheManagerBuilder;
    import org.ehcache.config.builders.ResourcePoolsBuilder;
    import org.ehcache.expiry.Duration;
    import org.ehcache.expiry.Expirations;
    
    import java.util.concurrent.TimeUnit;
    
    /** * @author lf * @描述 测试ehcache缓存 * @date 2018-11-27 */
    public class EhcacheTest { 
    
        public static void main(String[] args) { 
            // 构建一个缓存管理器
            CacheManager cacheManager = CacheManagerBuilder.newCacheManagerBuilder().build(true);
    
            CacheConfiguration<String, String> cacheConfiguration = CacheConfigurationBuilder
                    .newCacheConfigurationBuilder(String.class, String.class, ResourcePoolsBuilder.heap(10000))
                    // 存活时间是3秒，过期后自动清除
                    .withExpiry(Expirations.timeToLiveExpiration(Duration.of(3, TimeUnit.MINUTES))).build();
            // 根据配置创建一个缓存容器
            Cache<String, String> myCache = cacheManager.createCache("myCache", cacheConfiguration);
            // 设置一个值
            myCache.put("key", "value");
    
            try { 
                Thread.sleep(1000);
                System.out.println("yi:"+myCache.get("key"));
    
                Thread.sleep(1000);
                System.out.println("er:"+myCache.get("key"));
    
                myCache.put("key", "value");
    
                Thread.sleep(1000);
                System.out.println("san:"+myCache.get("key"));
    
                Thread.sleep(1000);
                System.out.println("si:"+myCache.get("key"));
    
                Thread.sleep(1000);
                System.out.println("wu:"+myCache.get("key"));
    
                Thread.sleep(1000);
                System.out.println("liu:"+myCache.get("key"));
    
                Thread.sleep(1000);
                System.out.println("qi:"+myCache.get("key"));
    
            } catch (InterruptedException e) { 
                e.printStackTrace();
            }
            cacheManager.close();
        }
    }

**容器可以创建多个，经测试，重新添加已经存在的key，它的过期时间是重新计算，过期就自动删除了，获取出来的值就是null**

官网 [http://www.ehcache.org/documentation/][http_www.ehcache.org_documentation]

[http_www.ehcache.org_documentation]: http://www.ehcache.org/documentation/