//不需要判断policy为null,policy为null,认定为不适用缓存,不会掉用此方法
@Override
public boolean ifReturnFromCahce(Method method, Object[] args) {
CachePolicy policy=method.getAnnotation(CachePolicy.class);
if(policy.expires() < 0){
System.out.println("没有有效期,false");
return false;
}
try {
String key=getCacheKey(method,args);