ehcache工具类java工程中单独使用

看网上有人说Ehcache，给的例子不是很细致， 写了一个在 java工程中单独使用的Ehcache工具类，代码中没有留故意的障碍，有别的错误的话各位自己甄别，具体工程在我电脑上如下：几个主要API如下：/apidocs/net/sf/ehcache/Cache.html/apidocs/net/sf/ehcache/Element.html/apidocs/net/sf/ehcache/CacheManager.htmlEhcache配置文件ehcache.xml如下：工具类如下：package util;import net.sf.ehcache.Cache;import net.sf.ehcache.CacheManager;import net.sf.ehcache.Element;/* author HJ* */public class EhcacheUtil /指定配置文件private static final String appointPath=“src/ehcache.xml“;private CacheManager cacheManager;private static EhcacheUtil ehcacheUtil;private EhcacheUtil(String appointPath) cacheManager = CacheManager.create(appointPath);public static EhcacheUtil getInstance() if (ehcacheUtil= null) ehcacheUtil= new EhcacheUtil(appointPath);return ehcacheUtil;/* 将键值对放入内存* */public void put(String cacheName, Object key, Object value) Cache cache = cacheManager.getCache(cacheName);if(cache = null)/* 该类设计为java工程中单独使用，旨在保存一些常用的不经常更新的数据在缓存中* 所以构造Cache时* 第二个参数为允许内存中缓存对象的大小，这里为10000000* 第三个参数为允许在内存达到最大后写入磁盘* 第四个参数表示永久保存* 最后两个参数表示Element存活时间无穷大* */cache= new Cache(cacheName, 10000000, true, true, 0, 0);cacheManager.addCache(cache);Element element = new Element(key, value);cache.put(element);/* 获取Element的键值* */public Object getElement(String cacheName, Object key) Cache cache = cacheManager.getCache(cacheName);if(cache != null)Element element = cache.get(key);return element = null ? null : element.getObjectValue();return null;/* 获取Cache 值* */public Cache getCache(String cacheName) return cacheManager.getCache(cacheName);/* 删除某个键值对* */public void removeElement(String cacheName, Object key) Cache cache = cacheManager.getCache(cacheName);if(cache !=null )cache.remove(key);/* 删除某个cache* */public void removeCache(String cacheName) Cache cache = cacheManager.getCache(cacheName);if(cache !=null )cacheManager.removeCache(cacheName);测试类如下：package util;public class Main /* author HJ*/public static void main(String args) EhcacheUtil.getInstance().put(“memory-1“,“key-11“,“value-11“);EhcacheUtil.getInstance().put(“memory-1“,“key-12“,“value-12“);EhcacheUtil.getInstance().put(“memory-2“,“key-21“,“value-21“);EhcacheUtil.getInstance().put(“memory-2“,“key-22“,“value-22“);String value= EhcacheUtil.getInstance().getElement(“memory-2“, “key-21“).toString();System.out.println(value);value= EhcacheUtil.getInstance().getElement(“memory-1“, “key-11“).toString();System.out.println(value);EhcacheUtil.g