缓存bean
importjava.io.InputStream;
importorg.apache.commons.logging.Log;
importorg.apache.commons.logging.LogFactory;
importnet.sf.ehcache.Cache;
importnet.sf.ehcache.CacheException;
importnet.sf.ehcache.CacheManager;
importnet.sf.ehcache.Element;
publicclassResourceCache{
privatestaticResourceCacheinstance=null;
privatestaticLoglog=LogFactory.getLog(ResourceCache.class);
privatestaticCachecache=null;
privatestaticCacheManagermanager=null;
/**
*Instantiatesanewflashdatacache.
*
*@throwsException
*/
privateResourceCache()throwsException{
try{
InputStreamconfigFile=ResourceCache.class.getClassLoader()
.getResourceAsStream("ehcache.xml");
manager=CacheManager.create(configFile);
cache=manager.getCache("authorities");
}catch(Exceptione){
thrownewException("得到cache失败!",e);
}
}
publicstaticResourceCachegetInstance()throwsException{
if(instance==null){
instance=newResourceCache();
//jvm关闭时才执行此钩子，但对象已经被�?��，会抛出空指�?
//Runtime.getRuntime().addShutdownHook(newThread(){
//publicvoidrun(){
//FlashDataCache.manager.shutdown();
//}
//});
}
returninstance;
}
publicvoidputData(Stringkey,Objectvalue){
try{
Elementelement=newElement(key,value);
cache.put(element);
cache.flush();
}catch(IllegalArgumentExceptione){
log.error("放入缓存失败",e);
e.printStackTrace();
}catch(IllegalStateExceptione){
log.error("放入缓存失败",e);
e.printStackTrace();
}catch(CacheExceptione){
log.error("放入缓存失败",e);
e.printStackTrace();
}
}
publicObjectgetData(Stringkey){
Objectbean=null;
try{
Elementelement=cache.get(key);
if(element!=null){
bean=element.getValue();
}
}catch(IllegalStateExceptione){
bean=null;
log.error("取出缓存失败",e);
e.printStackTrace();
}catch(CacheExceptione){
bean=null;
log.error("取出缓存失败",e);
e.printStackTrace();
}
returnbean;
}
publicstaticvoiddestroy(){
ResourceCache.manager.shutdown();
}
publicstaticvoidmain(String[]args)throwsException{
ResourceCache.getInstance().putData("x","chenghui");
System.out.println(ResourceCache.getInstance());
System.out.println(ResourceCache.getInstance());
System.out.println(ResourceCache.getInstance().getData("x"));
}