spring用单例模型做高速缓存.docVIP

Spring高速缓存 先来一个单例模型，里面的重点是有一个map，可以获取内存空间。单例模型的话，可以自己访问自己，内部数据，不会被垃圾回收机制回收。 @Component public class AutoReplyCache { private static HashMapString,Object cacheMap; @Autowired private AutoreplyListService autoreplyListService; private static AutoReplyCache arcache; private byte[] lock = new byte[0]; public static AutoReplyCache getInstance() { if(arcache== null) { arcache = new AutoReplyCache(); } return arcache; } public AutoReplyCache(){ } public synchronized void loadAll() { System.out.println(=====+得到缓存========); cacheMap=new HashMapString,Object(); ListAutoreplyList arlistlist =autoreplyListService.getList(); if(arlistlist != null){ setCacheMap(arlistlist); } System.out.println(===+得到缓存完毕=====); } public synchronized void reloadAll() { System.out.println(====+重新得到缓存=====); ListAutoreplyList arlistlist = autoreplyListService.getList(); if(arlistlist != null){ cacheMap.clear(); setCacheMap(arlistlist); } System.out.println(====+重新得到缓存=====); } private void setCacheMap(ListAutoreplyList arlistlist) { for (AutoreplyList arlist : arlistlist) { cacheMap.put(String.valueOf(arlist.getNum()),arlist); } } public synchronized void add(AutoreplyList arlist){ cacheMap.put(String.valueOf(arlist.getNum()),arlist); } public synchronized void update(AutoreplyList arlist) { cacheMap.put(String.valueOf(arlist.getNum()), arlist); } public synchronized AutoreplyList findarlistByID(String id){ if(cacheMap.values()!=null cacheMap.values().size()0){ for (Iterator iter = cacheMap.values().iterator(); iter.hasNext();) { AutoreplyList arlist = (AutoreplyList) iter.next(); if(id.equals(String.valueOf(arlist.getId()))){