①配置文件 ehcache.xml
②EhCacheUtil工具类
package com.kentrasoft.util; import java.io.Serializable; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.HashSet; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import java.util.Set; import net.sf.ehcache.Cache; import net.sf.ehcache.CacheManager; import net.sf.ehcache.Element; public class EhCacheUtil { private static Cache kentrasoftCache; private static CacheManager manager; private static EhCacheUtil instance; static { // init(); } public static Cache getKentrasoftCache() { return kentrasoftCache; } public static CacheManager getManager() { return manager; } public static EhCacheUtil init() { System.setProperty("net.sf.ehcache.enableShutdownHook", "true"); if (instance == null) { instance = new EhCacheUtil(); manager = CacheManager.create(EhCacheUtil.class.getClassLoader().getResourceAsStream("ehcache/ehcache.xml")); kentrasoftCache = manager.getCache("kentrasoftCache"); } return instance; } public static EhCacheUtil init(String path) { System.setProperty("net.sf.ehcache.enableShutdownHook", "true"); if (instance == null) { instance = new EhCacheUtil(); manager = CacheManager.create(EhCacheUtil.class.getClassLoader().getResourceAsStream(path)); kentrasoftCache = manager.getCache("kentrasoftCache"); } return instance; } private static boolean isNull(Element e) { return e == null || e.getObjectValue() == null || e.getObjectValue() == null; } /** * 存入 * @param* @param cache 缓存库 * @param key 键 * @param value 值 */ public static void put(Cache cache, String key, T value) { Element e = new Element(key, value); cache.put(e); cache.flush(); } /** * 存入 并设置元素是否永恒保存 * @param * @param cache 缓存库 * @param key 键 * @param value 值 */ public static void put(Cache cache, String key, T value, boolean eternal) { Element element = new Element(key, value); element.setEternal(eternal); cache.put(element); cache.flush(); } /** * 存入 * * @param * @param cache 缓存库 * @param key 键 * @param value 值 * @param timeToLiveSeconds 最大存活时间 * @param timeToIdleSeconds 最大访问间隔时间 */ public static void put(Cache cache, String key, T value, int timeToLiveSeconds, int timeToIdleSeconds) { Element element = new Element(key, value); element.setTimeToLive(timeToLiveSeconds); element.setTimeToIdle(timeToIdleSeconds); cache.put(element); cache.flush(); } public static Object getCacheElement(Cache cache, String key) { Element e = cache.get(key); return e; } public static Object get(Cache cache, String key) { Element e = cache.get(key); if (e != null) { return e.getObjectValue(); } return null; } public static void remove(Cache cache, String key) { cache.remove(key); } public static void removeAll(Cache cache, Collection keys) { cache.removeAll(keys); } @SuppressWarnings("unchecked") public static void addToList(Cache cache, String key, Serializable value) { Element e = cache.get(key); if (isNull(e)) { List list = Collections.synchronizedList(new LinkedList ()); list.add(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } else { List list = (List ) e.getObjectValue(); list.add(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } cache.flush(); } @SuppressWarnings("unchecked") public static void addAllToList(Cache cache, String key, Collection extends Serializable> value) { Element e = cache.get(key); if (isNull(e)) { List list = Collections.synchronizedList(new LinkedList ()); list.addAll(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } else { List list = (List ) e.getObjectValue(); list.addAll(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } cache.flush(); } @SuppressWarnings("unchecked") public static void addToHashSet(Cache cache, String key, Serializable value) { Element e = cache.get(key); if (isNull(e)) { Set list = Collections.synchronizedSet(new HashSet ()); list.add(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } else { Set list = (Set ) e.getObjectValue(); list.add(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } cache.flush(); } @SuppressWarnings("unchecked") public static void addAllToHashSet(Cache cache, String key, Collection extends Serializable> value) { Element e = cache.get(key); if (isNull(e)) { Set list = Collections.synchronizedSet(new HashSet ()); list.addAll(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } else { Set list = (Set ) e.getObjectValue(); list.addAll(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } cache.flush(); } @SuppressWarnings("unchecked") public static void addToArrayList(Cache cache, String key, Serializable value) { Element e = cache.get(key); if (isNull(e)) { List list = Collections.synchronizedList(new ArrayList ()); list.add(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } else { List list = (List ) e.getObjectValue(); list.add(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } cache.flush(); } @SuppressWarnings("unchecked") public static void addAllToArrayList(Cache cache, String key, Collection extends Serializable> value) { Element e = cache.get(key); if (isNull(e)) { List list = Collections.synchronizedList(new ArrayList ()); list.addAll(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } else { List list = (List ) e.getObjectValue(); list.addAll(value); e = new Element(key, list); e.setEternal(true); cache.put(e); } cache.flush(); } @SuppressWarnings("unchecked") public static T popFromList(Cache cache, String key, Class T) { Element e = cache.get(key); if (e != null) { List list = (List ) e.getObjectValue(); Iterator it = list.iterator(); if (list.size() > 0) { Serializable obj = it.next(); it.remove(); e = new Element(key, list); e.setEternal(true); cache.put(e); cache.flush(); return (T) obj; } } return null; } @SuppressWarnings("unchecked") public static List popFromList(Cache cache, String key, int count, Class T) { Element e = cache.get(key); if (e != null) { List list = (List ) e.getObjectValue(); if (count < 1) { List result = (List ) new ArrayList (list); list.clear(); e = new Element(key, list); e.setEternal(true); cache.put(e); cache.flush(); return result; } List result = new ArrayList (count); Iterator it = list.iterator(); for (int i = 0; i < count && it.hasNext(); i++) { Serializable obj = it.next(); it.remove(); result.add((T) obj); } e = new Element(key, list); e.setEternal(true); cache.put(e); cache.flush(); return result; } return null; } @SuppressWarnings("unchecked") public static T popFromHashSet(Cache cache, String key, Class T) { Element e = cache.get(key); if (e != null) { Set list = (Set ) e.getObjectValue(); Iterator it = list.iterator(); if (list.size() > 0) { Serializable obj = it.next(); it.remove(); e = new Element(key, list); e.setEternal(true); cache.put(e); cache.flush(); return (T) obj; } } return null; } @SuppressWarnings("unchecked") public static List popFromHashSet(Cache cache, String key, int count, Class T) { Element e = cache.get(key); if (e != null) { Set list = (Set ) e.getObjectValue(); if (count < 1) { List result = (List ) new ArrayList (list); list.clear(); e = new Element(key, list); e.setEternal(true); cache.put(e); cache.flush(); return result; } List result = new ArrayList (count); Iterator it = list.iterator(); for (int i = 0; i < count && it.hasNext(); i++) { Serializable obj = it.next(); it.remove(); result.add((T) obj); } e = new Element(key, list); e.setEternal(true); cache.put(e); cache.flush(); return result; } return null; } @SuppressWarnings("unchecked") public static int getCollectionSize(Cache cache, String key) { Element e = cache.get(key); if (e != null) { Collection list = (Collection ) e.getObjectValue(); return list.size(); } return 0; } @SuppressWarnings("rawtypes") public static List getKeys(Cache cache) { return cache.getKeys(); } /**获取缓存名称集合 * @param cache Cache对象 * @param start 开始位置 * @return */ public static List getKeys(Cache cache, String start) { List> list = cache.getKeys(); List result = new ArrayList (list.size()); for (Object obj : list) { if (obj != null && obj.getClass() == String.class) { String s = (String) obj; if (s.startsWith(start)) result.add(s); } } return result; } }
③使用的时候,初始化echach对象,然后put对象进去。
//tokenId放入缓存中 EhCacheUtil.init(); EhCacheUtil.put(EhCacheUtil.getKentrasoftCache(), "TOKEN_ID","JIASJDFIOJIOAJI12341");
缓存可以设置有效期
//生成动态令牌 并设置有效期 // user.setAuthToken(UuidUtil.get32UUID()); // EhCacheUtil.init(); EhCacheUtil.put(EhCacheUtil.getKentrasoftCache(), user.getAuthToken(), user.getAuthToken(), 1000*60*30, 1000*60*30); EhCacheUtil.put(cache, key, value, timeToLiveSeconds, timeToIdleSeconds); EhCacheUtil.put(cache, key, value, eternal);
④在需要使用的地方get该对象就可以了
// 获取令牌 tokenId String tokenId = EhCacheUtil.get(EhCacheUtil.getKentrasoftCache(), "TOKEN_ID").toString();
⑤清除缓存中的数据
//清除缓存信息 EhCacheUtil.remove(EhCacheUtil.getKentrasoftCache(), loginName+"code");
⑥ehcache需要的jar包依赖
net.sf.ehcache ehcache 2.9.1
ehcache-core-2.9.1.jar
slf4j-api-1.5.11.jar
slf4j-jdk14-1.5.11.jar