code: protected String getCacheName(Invocation inv) {
  		CacheName cacheName = inv.getMethod().getAnnotation(CacheName.class);
  		if (cacheName != null) {
  			return cacheName.value();
  		}
  		
  		cacheName = inv.getController().getClass().getAnnotation(CacheName.class);
  		if (cacheName == null) {
  			throw new RuntimeException("EvictInterceptor need CacheName annotation in controller.");
  		}
  		
  		return cacheName.value();
  	}
docs: 获取 @CacheName 注解配置的 cacheName，注解可配置在方法和类之上