根据间隔获取一段时间内的所有时间（附String,Date,LocalDateTime 之间的转换）

根据间隔获取一段时间内的所有时间

public static List<LocalDateTime> getTimeIntervals(LocalDateTime startTime, LocalDateTime endTime, int interval, String intervalType) {
        List<LocalDateTime> timeIntervals = new ArrayList<>();

        switch (intervalType) {
            case "day":
                while (!startTime.isAfter(endTime)) {
                    timeIntervals.add(startTime);
                    startTime = startTime.plusDays(interval);
                }
                break;
            case "hour":
                while (!startTime.isAfter(endTime)) {
                    timeIntervals.add(startTime);
                    startTime = startTime.plusHours(interval);
                }
                break;
            case "minute":
                while (!startTime.isAfter(endTime)) {
                    timeIntervals.add(startTime);
                    startTime = startTime.plusMinutes(interval);
                }
                break;
            case "second":
                while (!startTime.isAfter(endTime)) {
                    timeIntervals.add(startTime);
                    startTime = startTime.plusSeconds(interval);
                }
                break;
            default:
                throw new IllegalArgumentException("Unsupported interval type: " + intervalType);
        }

        return timeIntervals;
    }
    
	public static List<String> getTimeIntervalStrList(LocalDateTime startTime, LocalDateTime endTime, int interval, String intervalType){
        List<LocalDateTime> timeIntervals = getTimeIntervals(startTime, endTime, interval, intervalType);
        List<String> ss = new ArrayList<>();
        for (LocalDateTime t : timeIntervals) {
            ss.add(toTimeStr(t));
        }
        return ss;
    }

String,Date,LocalDateTime 之间的转换

public static Date toDate(LocalDateTime a){
        ZonedDateTime zonedDateTime = a.atZone(ZoneId.systemDefault());
        Instant instant = zonedDateTime.toInstant();
        return Date.from(instant);
    }

    public static LocalDateTime toLocalDateTime(Date a){
        Instant instant = a.toInstant();
        return LocalDateTime.ofInstant(instant,ZoneId.systemDefault());
    }

    public static Date getDateByStr(String s){
        Date date = new Date();
        try {
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat(s.contains(" ") ? "yyyy-MM-dd HH:mm:ss" : "yyyy-MM-dd");
            date = simpleDateFormat.parse(s);
        } catch (ParseException e) {
            e.printStackTrace();
        }finally {
            return date;
        }
    }

    public static LocalDateTime getLocalDateTimeByStr(String s){
        DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        return LocalDateTime.parse(s,df);
    }

    public static String toTimeStr(LocalDateTime a){
        DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        return a.format(df);
    }