lambda表達式，對List集合進行排序

		//List<String> 排序
		Map<String, List<Entity>> map = MapUtils.newHashMap(); 
		List<String> keys = ListUtils.newArrayList(map.keySet()).stream().sorted(Comparator.comparing(d -> d)).collect(Collectors.toList());

        //List<Entity> 排序
		List<Entity> list = result.sort((a, b) -> a.getCustomer().getId().compareTo(b.getCustomer().getId()));