/** 销毁 */
 @Override
 public void destroy() throws Exception {
   super.destroy();
   if (esClient != null) {
     esClient.close();
   }
   if (node != null) {
     node.close();
   }
 }
 /** @see org.springframework.beans.factory.config.AbstractFactoryBean#afterPropertiesSet() */
 @Override
 public void afterPropertiesSet() throws Exception {
   super.afterPropertiesSet();
 }