TimeUtil 工具类

/**
 * TODO
 *
 * @auther xh
 * @date 6/11/19 3:32 PM
 */
public class TimeUtil {

    public static final String defaultZone = "Asia/Shanghai";
    private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    //private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");

    // 获得某天最大时间 2017-10-15 23:59:59
    public static Date getEndOfDay(Date date) {
        LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.of(defaultZone));
        LocalDateTime endOfDay = localDateTime.with(LocalTime.MAX);
        return Date.from(endOfDay.atZone(ZoneId.of(defaultZone)).toInstant());
    }

    // 获得某天最小时间 2017-10-15 00:00:00
    public static Date getStartOfDay(Date date) {
        LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.of(defaultZone));
        LocalDateTime startOfDay = localDateTime.with(LocalTime.MIN);
        return Date.from(startOfDay.atZone(ZoneId.of(defaultZone)).toInstant());

    }

    // 获得某天最大时间 2017-10-15 23:59:59
    public static Instant getEndOfDay(Instant date) {
        LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(Date.from(date).getTime()), ZoneId.of(defaultZone));
        LocalDateTime endOfDay = localDateTime.with(LocalTime.MAX);
        Date from = Date.from(endOfDay.atZone(ZoneId.of(defaultZone)).toInstant());
        return from.toInstant();
    }


    // 获得某天最小时间 2017-10-15 00:00:00
    public static Instant getStartOfDay(Instant date) {
        LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(Date.from(date).getTime()), ZoneId.of(defaultZone));
        LocalDateTime startOfDay = localDateTime.with(LocalTime.MIN);
        Date from = Date.from(startOfDay.atZone(ZoneId.of(defaultZone)).toInstant());
        return from.toInstant();

    }

    public static String date2Str(Date date) {
        if (date == null) {
            return null;
        }
        ZoneId zone = ZoneId.of(defaultZone);
        LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), zone);
        return dateTimeFormatter.format(localDateTime);
    }

    public static String instant2Str(Instant date) {
        ZoneId zone = ZoneId.of(defaultZone);
        LocalDateTime localDateTime = LocalDateTime.ofInstant(date, zone);
        return dateTimeFormatter.format(localDateTime);
    }

    public static Date str2Date(String date) {
        if (StringUtils.isBlank(date)) {
            return null;
        }
        date = date.trim();
        if (date.length() == 10) {
            date += " 00:00:00";
        }
        LocalDateTime localDate = LocalDateTime.parse(date, dateTimeFormatter);
        ZoneId zone = ZoneId.of(defaultZone);
        Instant instant = localDate.atZone(zone).toInstant();
        return Date.from(instant);
    }

    public static Instant str2Instant(String date) {
        if (StringUtils.isBlank(date)) {
            return null;
        }
        date = date.trim();
        if (date.length() == 10) {
            date += " 00:00:00";
        }
        LocalDateTime localDateTime = LocalDateTime.parse(date, dateTimeFormatter);
        ZoneId zone = ZoneId.of(defaultZone);
        return localDateTime.atZone(zone).toInstant();
    }


    /**
     * 得到几天前的时间
     *
     * @param d
     * @param day
     * @return
     */
    public static Date getDateBefore(Date d, int day) {
        Calendar now = Calendar.getInstance();
        now.setTime(d);
        now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
        return now.getTime();
    }

    /**
     * 得到几天后的时间
     *
     * @param d
     * @param day
     * @return
     */
    public static Date getDateAfter(Date d, int day) {
        Calendar now = Calendar.getInstance();
        now.setTime(d);
        now.set(Calendar.DATE, now.get(Calendar.DATE) + day);
        return now.getTime();
    }
}

转载于:https://www.cnblogs.com/lanqie/p/11542175.html