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public class DateUtil {
       public static final String YYYYMMDD = "yyyyMMdd";    public static final String HHMMSS = "HHmmss";    public static final String YYYY_MM_DD = "yyyy-MM-dd";    public static final String YYYYMMDDHHMM = "yyyyMMddHHmm";    public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";    public static final String YYYYMMDDHHMMSSSSS = "yyyyMMddHHmmssSSS";    public static final String YYYYMMDD_HH_MM_SS = "yyyyMMdd HH:mm:ss";    public static final String YYYY1MM1DDHHMMSS_SSS = "yyyy/MM/dd:HH:mm:ss.SSS";    public static final String YYYY1MM1DDHHMMSSSSSZZ = "yyyy/MM/dd:HH:mm:ss.SSS ZZ";    public static final String YYYY1MM1DDHHMMSS = "yyyy/MM/dd HH:mm:ss";    public static final String YYYY_MM_DDHHMMSS = "yyyy-MM-dd HH:mm:ss";    public static final String YYYY_MM_DDHHMM = "yyyy-MM-dd HH:mm";    public static final String MM_DD = "MM-dd";    public static final String MM = "MM";    public static final String ZERO_TIME = " 00:00:00";    public static final int ZERO = 0;    public static final int HOUR = 23;    public static final int MINUTE = 59;    public static final int SECOND = 59;    public static final ZoneId zoneId = ZoneId.systemDefault();    public static Date getCurrentDate() {        return new Date();    }    public static Date getYesterday(Date date) {        return getInterval(x -> x.plusDays(-1), date);    }    public static Date getIntervalMonth(Date date, int month) {        return getInterval(x -> x.plusMonths(month), date);    }    public static Date getIntervalDay(Date date, int day) {        return getInterval(x -> x.plusDays(day), date);    }    public static Date getIntervalHours(Date date, int hours) {        return getInterval(x -> x.plusHours(hours), date);    }    public static Date getIntervalMinutes(Date date, int minutes) {        return getInterval(x -> x.plusMinutes(minutes), date);    }    public static Date getIntervalSeconds(Date date, int seconds) {        return getInterval(x -> x.plusSeconds(seconds), date);    }    public static Date convertStringToDate(String date, String format) {        try {            return new SimpleDateFormat(format).parse(date);        } catch (ParseException e) {            throw new RuntimeException("日期转换异常： " + date, e);        }    }    public static String convertDateToString(Date date, String format) {        return new SimpleDateFormat(format).format(date);    }    public static String getIntervalDate(Date date, String format, int days) {        return convertDateToString(getIntervalDay(date, days), format);    }    public static String getIntervalMinute(Date date, String format, int minutes) {        return convertDateToString(getIntervalMinutes(date, minutes), format);    }    public static Date getStartTimeOfSpecifiedDate(Date date) {        return getInterval(x -> x.withHour(ZERO).withSecond(ZERO).withMinute(ZERO).withNano(ZERO), date);    }    public static Date getEndTimeOfSpecifiedDate(Date date) {        return getInterval(x -> x.withHour(HOUR).withSecond(SECOND).withMinute(MINUTE), date);    }    public static Date getFirstDayOfMonth(Date date) {        return getStartTimeOfSpecifiedDate(getInterval(x -> x.withDayOfMonth(1), date));    }    public static Date getFirstDayOfYear(Date date) {        return getStartTimeOfSpecifiedDate(getInterval(x -> x.withDayOfYear(1), date));    }    public static int getBetweenDays(Date startDate, Date endDate) {        Duration duration = Duration.between(getLocalDateTime(startDate), getLocalDateTime(endDate));        return (int) duration.toDays();    }    private static LocalDateTime getLocalDateTime(Date date) {        return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());    }    private static Date getInterval(UnaryOperator
   
     unaryOperator, Date date) {        LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());        localDateTime = unaryOperator.apply(localDateTime);        return new Date(localDateTime.atZone(zoneId).toInstant().toEpochMilli());    }}
   

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