Java Cache System JCS(一) 使用方法

                    

                     JCS 是JAVA 中缓存的一种实现，支持将数据缓存到内存或硬盘中，支持设置缓存对象的有效时长。使用时需要用到以下几个jar包：

commons-collections-2.1.1.jar

commons-lang.2.3.jar

commons-logging-1.0.4.jar

concurrent-1.3.2.jar

jcs-1.3.jar

slf4j-api.jar

定义实现了Serializable 接口的存储对象类：

public class UserInfo implements Serializable{ private String username; private String domain; public UserInfo(String name){ this.username = name; } public UserInfo(String name,String domain){ this.username= name; this.domain =domain; }  }

定义存储类：

public class UserManager{ private JCS jcscache; private final String NAME_SPACE="userinfo"; private static class UserManagerContainer{ private static UserManager instance = new UserManager(); } public static UserManager getInstance(){ return UserManagerContainer.instance } private UserManager(){ try{ jcscache= JCS.getInstance(NAME_SPACE); } catch(CacheException e){ } } public UserInfo get(String key){ return (UserInfo) jcscache.get(key); } pubilc void put(String key,UserInfo info,boolean isoverride){ try{ if(isoverride){ jcscache.put(key,info); } else{ jcscache.putSafe(key,info); } } catch(CacheException e){ } } }

定义配置文件：cache.ccf

jcs.default=DC jcs.defaultcacheattributes=org.engine.CompositeCacheAttributes jcs.defaultcacheattributes.MaxObjects=500000 jcs.defaultcacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache jcs.defaultcacheattributes.UseMemoryShrinker=true jcs.defaultcacheattributes.MaxMemoryIdleTimeSeconds=1200 jcs.defaultcacheattributes.ShrinkerIntervalSeconds=30 jcs.defaultcacheattributes.MaxSpoolPerRun=500 jcs.default.elementattributes=org.apache.jcs.engine.ElementAttributes jcs.default.elementattributes.IsEternal=false jcs.auxiliary.DC=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheFactory jcs.auxiliary.DC.attributes=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheAttribute jcs.auxiliary.DC.attributes.DiskPatch=d:/memory