pub fn loading() {
let config_path = single_get_ref!("log4rs_config_path");
let config_path_str = config_path.cast_ref::<String>();
info!("loading log4rs path:{}",&config_path_str);
let result = log4rs::init_file(config_path_str, Default::default()).unwrap();
info!("loading log4rs result:{:?}",result);
}