public void testQueryNode(){
		try {
			final CountDownLatch countDownLatch = new CountDownLatch(1);
			
			NodeCrud nodeCrud = new NodeCrud(HOSTS);
			nodeCrud.queryNode("/testNode1", new Watcher(){
				@Override
				public void process(WatchedEvent event) {
					System.out.printf("zk回调,数据发生变化,eventType:%s eventState:%s\n", event.getType().toString(),event.getState().toString());
					countDownLatch.countDown();
				}
			});
			
			countDownLatch.await();
			nodeCrud.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}