List＜Map＜String, Object＞＞类型升序、降序

需求：对List<Map<String, Object>>类型的数据key值为"removeDate"，类型为Long进行升序和降序

1、升序

   /**
	 * 升序
	 * @param list
	 */
	private static void listSortUp(List<Map<String, Object>> list) {
		Collections.sort(list, (o1, o2) -> {
			try {
				long dt1 = (long) o1.get("removeDate");
				long dt2 = (long) o2.get("removeDate");
				if (dt1 > dt2) {
					return 1;
				} else if (dt1 < dt2) {
					return -1;
				} else {
					return 0;
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
			return 0;
		});
	}

2、降序

   /**
	 * 降序
	 * @param list
	 */
	private static void listSortDown(List<Map<String, Object>> list) {
		Collections.sort(list, (o1, o2) -> {
			try {
				long dt1 = (long) o1.get("removeDate");
				long dt2 = (long) o2.get("removeDate");
				if (dt1 > dt2) {
					return -1;
				} else if (dt1 < dt2) {
					return 1;
				} else {
					return 0;
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
			return 0;
		});
	}