/^(\d{4})-(\d{2})-(\d{2})/.exec("2023-08-17 16:44:17")["2023-08-17", "2023", "08", "17"]/(\d{4})-(\d{2})-(\d{2})/.exec("2023-08-17 16:44:17")["2023-08-17", "2023", "08", "17"]/\d{4}-\d{2}-\d{2}/.exec("2023-08-17 16:44:17")返回是数组