Java 时间工具类

朱雀 2023-10-13 08:44 47阅读 0赞

借鉴网上资源与工作中经验整理的时间工具类（主要针对java.util.Date的使用，java8后的时间工具下期整理），欢迎大家一起完善补充。

import lombok.extern.slf4j.Slf4j;
    
    import java.sql.Timestamp;
    import java.text.ParseException;
    import java.text.ParsePosition;
    import java.text.SimpleDateFormat;
    import java.util.*;
    
    
    /**
     * 时间工具类
     *
     * @author ocean
     */
    @Slf4j
    public class DateUtils {
    
        /**
         * 定时器时间
         */
        public static final String FORMAT_CORN = "ss mm HH dd MM ?";
    
        /**
         * 日期格式
         */
        public static final String FORMAT_DATE = "yyyyMMdd";
    
        /**
         * 日期格式 -
         */
        public static final String FORMAT_DATE_HORIZONTAL = "yyyy-MM-dd";
    
    
        /**
         * 日期格式 /
         */
        public static final String FORMAT_DATE_BIAS = "yyyy/MM/dd";
    
        /**
         * 时间格式
         */
        public static final String FORMAT_TIME = "HHmmss";
    
        /**
         * 时间格式 :
         */
        public static final String FORMAT_TIME_COLON = "HH:mm:ss";
    
        /**
         * 完整日期
         */
        public static final String FORMAT_DATETIME = "yyyyMMddhhmmss";
    
        /**
         * 完整日期 -
         */
        public static final String FORMAT_DATETIME_HORIZONTAL = "yyyy-MM-dd HH:mm:ss";
    
        /**
         * 完整日期 /
         */
        public static final String FORMAT_DATETIME_BIAS = "yyyy/MM/dd HH:mm:ss";
    
        private DateUtils() {
        }
    
        /**
         * 通过ThreadLocal,每个线程会有自己独立的SimpleDateFormat对象,这样多个线程 Format 时间时就不会出现线程安全问题
         * 空间换时间
         */
        private static final ThreadLocal<SimpleDateFormat> DATETIME_HORIZONTAL_THREAD_LOCAL_FORMAT = new ThreadLocal<SimpleDateFormat>() {
            @Override
            protected SimpleDateFormat initialValue() {
                return new SimpleDateFormat(FORMAT_DATETIME_HORIZONTAL);
            }
        };
    
    
        /**=================================    今天、昨天、本周、上周、本年及特定时间的开始时间和结束时间   ================================**/
    
        /**
         * 获取当天开始时间
         *
         * @return java.util.Date
         */
        public static Date getDayBegin() {
            Calendar cal = Calendar.getInstance();
            cal.set(Calendar.HOUR_OF_DAY, 0);   //0点
            cal.set(Calendar.MINUTE, 0);        //0分
            cal.set(Calendar.SECOND, 0);        //0秒
            cal.set(Calendar.MILLISECOND, 0);   //0毫秒
            return cal.getTime();
        }
    
    
        /**
         * 获取当天结束时间
         *
         * @return java.util.Date
         */
        public static Date getDayEnd() {
            Calendar cal = Calendar.getInstance();
            cal.set(Calendar.HOUR_OF_DAY, 23);  //23点
            cal.set(Calendar.MINUTE, 59);       //59分
            cal.set(Calendar.SECOND, 59);       //59秒
            return cal.getTime();
        }
    
    
        /**
         * 获取昨天开始时间
         *
         * @return java.util.Date
         */
        public static Date getBeginDayOfYesterday() {
            Calendar cal = Calendar.getInstance();
            cal.setTime(getDayBegin());                 //当天开始时间
            cal.add(Calendar.DAY_OF_MONTH, -1); //当天月份天数减1
            return cal.getTime();
        }
    
    
        /**
         * 获取昨天结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfYesterday() {
            Calendar cal = Calendar.getInstance();
            cal.setTime(getDayEnd());                       //当天结束时间
            cal.add(Calendar.DAY_OF_MONTH, -1);     //当天月份天数减1
            return cal.getTime();
        }
    
    
        /**
         * 获取明天开始时间
         *
         * @return java.util.Date
         */
        public static Date getBeginDayOfTomorrow() {
            Calendar cal = Calendar.getInstance();
            cal.setTime(getDayBegin());                 //当天开始时间
            cal.add(Calendar.DAY_OF_MONTH, 1);  //当天月份天数加1
            return cal.getTime();
        }
    
    
        /**
         * 获取明天结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfTomorrow() {
            Calendar cal = Calendar.getInstance();
            cal.setTime(getDayEnd());                   //当天结束时间
            cal.add(Calendar.DAY_OF_MONTH, 1);  //当天月份天数加1
            return cal.getTime();
        }
    
    
        /**
         * 获取某个日期的开始时间
         *
         * @param d 指点日期
         * @return Timestamp
         */
        public static Timestamp getDayStartTime(Date d) {
            Calendar calendar = Calendar.getInstance();
            if (null != d) {
                calendar.setTime(d);
            }
            calendar.set(calendar.get(Calendar.YEAR),
                    calendar.get(Calendar.MONTH),
                    calendar.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
            calendar.set(Calendar.MILLISECOND, 0);
            return new Timestamp(calendar.getTimeInMillis());
        }
    
    
        /**
         * 获取某个日期的结束时间
         *
         * @param d 指定日期
         * @return Timestamp
         */
        public static Timestamp getDayEndTime(Date d) {
            Calendar calendar = Calendar.getInstance();
            if (null != d) {
                calendar.setTime(d);
            }
            calendar.set(calendar.get(Calendar.YEAR),
                    calendar.get(Calendar.MONTH),
                    calendar.get(Calendar.DAY_OF_MONTH), 23, 59, 59);
            calendar.set(Calendar.MILLISECOND, 999);
            return new Timestamp(calendar.getTimeInMillis());
        }
    
    
        /**
         * 获取本周的开始时间
         *
         * @return java.util.Date
         */
        @SuppressWarnings("unused")
        public static Date getBeginDayOfWeek() {
            Date date = new Date();
            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
            if (dayOfWeek == 1) {
                dayOfWeek += 7;
            }
            cal.add(Calendar.DATE, 2 - dayOfWeek);
            return getDayStartTime(cal.getTime());
        }
    
    
        /**
         * 获取本周的结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfWeek() {
            Calendar cal = Calendar.getInstance();
            cal.setTime(getBeginDayOfWeek());
            cal.add(Calendar.DAY_OF_WEEK, 6);
            Date weekEndSta = cal.getTime();
            return getDayEndTime(weekEndSta);
        }
    
    
        /**
         * 获取上周开始时间
         */
        @SuppressWarnings("unused")
        public static Date getBeginDayOfLastWeek() {
            Date date = new Date();
            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
            if (dayofweek == 1) {
                dayofweek += 7;
            }
            cal.add(Calendar.DATE, 2 - dayofweek - 7);
            return getDayStartTime(cal.getTime());
        }
    
    
        /**
         * 获取上周的结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfLastWeek() {
            Calendar cal = Calendar.getInstance();
            cal.setTime(getBeginDayOfLastWeek());
            cal.add(Calendar.DAY_OF_WEEK, 6);
            Date weekEndSta = cal.getTime();
            return getDayEndTime(weekEndSta);
        }
    
    
        /**
         * 获取今年是哪一年
         *
         * @return Integer
         */
        public static Integer getNowYear() {
            Date date = new Date();
            GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
            gc.setTime(date);
            return gc.get(Calendar.YEAR);
        }
    
    
        /**
         * 获取本月是哪一月
         *
         * @return Integer
         */
        public static Integer getNowMonth() {
            Date date = new Date();
            GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
            gc.setTime(date);
            return gc.get(Calendar.MONTH) + 1;
        }
    
    
        /**
         * 获取本月的开始时间
         *
         * @return java.util.Date
         */
        public static Date getBeginDayOfMonth() {
            Calendar calendar = Calendar.getInstance();
            calendar.set(getNowYear(), getNowMonth() - 1, 1);
            return getDayStartTime(calendar.getTime());
        }
    
    
        /**
         * 获取本月的结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfMonth() {
            Calendar calendar = Calendar.getInstance();
            calendar.set(getNowYear(), getNowMonth() - 1, 1);
            int day = calendar.getActualMaximum(5);
            calendar.set(getNowYear(), getNowMonth() - 1, day);
            return getDayEndTime(calendar.getTime());
        }
    
    
        /**
         * 获取上月的开始时间
         *
         * @return java.util.Date
         */
        public static Date getBeginDayOfLastMonth() {
            Calendar calendar = Calendar.getInstance();
            calendar.set(getNowYear(), getNowMonth() - 2, 1);
            return getDayStartTime(calendar.getTime());
        }
    
    
        /**
         * 获取上月的结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfLastMonth() {
            Calendar calendar = Calendar.getInstance();
            calendar.set(getNowYear(), getNowMonth() - 2, 1);
            int day = calendar.getActualMaximum(5);
            calendar.set(getNowYear(), getNowMonth() - 2, day);
            return getDayEndTime(calendar.getTime());
        }
    
    
        /**
         * 获取本年的开始时间
         *
         * @return java.util.Date
         */
        public static Date getBeginDayOfYear() {
            Calendar cal = Calendar.getInstance();
            cal.set(Calendar.YEAR, getNowYear());
            cal.set(Calendar.MONTH, Calendar.JANUARY);
            cal.set(Calendar.DATE, 1);
            return getDayStartTime(cal.getTime());
        }
    
    
        /**
         * 获取本年的结束时间
         *
         * @return java.util.Date
         */
        public static Date getEndDayOfYear() {
            Calendar cal = Calendar.getInstance();
            cal.set(Calendar.YEAR, getNowYear());
            cal.set(Calendar.MONTH, Calendar.DECEMBER);
            cal.set(Calendar.DATE, 31);
            return getDayEndTime(cal.getTime());
        }
    
    
        /**
         * 两个日期相减得到的天数
         *
         * @param beginDate 开始时间
         * @param endDate   结束时间
         * @return Long
         */
        public static Long getDiffDays(Date beginDate, Date endDate) {
            if (beginDate == null || endDate == null) {
                throw new IllegalArgumentException("getDiffDays param is null!");
            }
            return (endDate.getTime() - beginDate.getTime()) / (1000 * 60 * 60 * 24);
        }
    
    
        /**
         * 两个日期相减得到的毫秒数
         *
         * @param beginDate 开始时间
         * @param endDate   结束时间
         * @return Long
         */
        public static Long dateDiff(Date beginDate, Date endDate) {
            long date1ms = beginDate.getTime();
            long date2ms = endDate.getTime();
            return date2ms - date1ms;
        }
    
    
        /**
         * 获取两个日期中的最大日起
         *
         * @param beginDate 开始时间
         * @param endDate   结束时间
         * @return java.util.Date
         */
        public static Date max(Date beginDate, Date endDate) {
            if (beginDate == null) {
                return endDate;
            }
            if (endDate == null) {
                return beginDate;
            }
            //beginDate日期大于endDate
            if (beginDate.after(endDate)) {
                return beginDate;
            }
            return endDate;
        }
    
    
        /**
         * 获取两个日期中的最小日期
         *
         * @param beginDate 开始时间
         * @param endDate   结束时间
         * @return java.util.Date
         */
        public static Date min(Date beginDate, Date endDate) {
            if (beginDate == null) {
                return endDate;
            }
            if (endDate == null) {
                return beginDate;
            }
            if (beginDate.after(endDate)) {
                return endDate;
            }
            return beginDate;
        }
    
    
        /**
         * 获取某月该季度的第一个月
         *
         * @param date 指定时间
         * @return java.util.Date
         */
        public static Date getFirstSeasonDate(Date date) {
            final int[] quarters = {1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4};
            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            int sean = quarters[cal.get(Calendar.MONTH)];
            cal.set(Calendar.MONTH, sean * 3 - 3);
            return cal.getTime();
        }
    
    
        /**
         * 返回某个日期下几天的日期
         *
         * @param date
         * @param i
         * @return
         */
        public static Date getNextDay(Date date, int i) {
            Calendar cal = new GregorianCalendar();
            cal.setTime(date);
            cal.set(Calendar.DATE, cal.get(Calendar.DATE) + i);
            return cal.getTime();
        }
    
    
        /**
         * 返回某个日期前几天的日期
         *
         * @param date
         * @param i
         * @return
         */
        public static Date getFrontDay(Date date, int i) {
            Calendar cal = new GregorianCalendar();
            cal.setTime(date);
            cal.set(Calendar.DATE, cal.get(Calendar.DATE) - i);
            return cal.getTime();
        }
    
    
        /**
         * 获取某年某月按天切片日期集合（某个月间隔多少天的日期集合）
         *
         * @param beginYear
         * @param beginMonth
         * @param k
         * @return
         */
        @SuppressWarnings({"unchecked", "rawtypes"})
        public static List getTimeList(int beginYear, int beginMonth, int k) {
            List list = new ArrayList();
            Calendar begincal = new GregorianCalendar(beginYear, beginMonth, 1);
            int max = begincal.getActualMaximum(Calendar.DATE);
            for (int i = 1; i < max; i = i + k) {
                list.add(begincal.getTime());
                begincal.add(Calendar.DATE, k);
            }
            begincal = new GregorianCalendar(beginYear, beginMonth, max);
            list.add(begincal.getTime());
            return list;
        }
    
    
        /**
         * 获取某年某月到某年某月按天的切片日期集合（间隔天数的集合）
         *
         * @param beginYear
         * @param beginMonth
         * @param endYear
         * @param endMonth
         * @param k
         * @return
         */
        @SuppressWarnings({"rawtypes", "unchecked"})
        public static List getTimeList(int beginYear, int beginMonth, int endYear, int endMonth, int k) {
            List list = new ArrayList();
            if (beginYear == endYear) {
                for (int j = beginMonth; j <= endMonth; j++) {
                    list.add(getTimeList(beginYear, j, k));
                }
            } else {
                for (int j = beginMonth; j < 12; j++) {
                    list.add(getTimeList(beginYear, j, k));
                }
                for (int i = beginYear + 1; i < endYear; i++) {
                    for (int j = 0; j < 12; j++) {
                        list.add(getTimeList(i, j, k));
                    }
                }
                for (int j = 0; j <= endMonth; j++) {
                    list.add(getTimeList(endYear, j, k));
                }
            }
            return list;
        }
    
    
        /**=================================    时间格式转换   ================================**/
    
        /**
         * date类型进行格式化输出（返回类型：String）
         *
         * @param date
         * @return
         */
        public static String dateFormat(Date date) {
            return DATETIME_HORIZONTAL_THREAD_LOCAL_FORMAT.get().format(date);
        }
    
        public static String dateFormat(Date date, String pattern) {
            return new SimpleDateFormat(pattern).format(date);
        }
    
    
        /**
         * 将"2015-08-31 21:08:06"型字符串转化为Date
         *
         * @param str
         * @return
         * @throws ParseException
         */
        public static Date stringToDate(String str) throws ParseException {
            return DATETIME_HORIZONTAL_THREAD_LOCAL_FORMAT.get().parse(str);
        }
    
        public static Date stringToDate(String str, String pattern) throws ParseException {
            return new SimpleDateFormat(pattern).parse(str);
        }
    
        /**
         * 将long类型转化为Date
         *
         * @param date
         * @return
         * @throws ParseException
         */
        public static Date longToDate(Long date) {
            return new Date(date * 1000);
        }
    
        /**
         * 将Date类型转化为long
         *
         * @param date
         * @return
         * @throws ParseException
         */
        public static Long dateToLong(Date date) {
            return date.getTime();
        }
    
        /**=================================    其他常见日期操作方法   ================================**/
    
        /**
         * 判断当前日期是否在[startDate, endDate]区间
         *
         * @param startDate 开始日期
         * @param endDate   结束日期
         * @return
         * @author jqlin
         */
        public static boolean isEffectiveDate(Date startDate, Date endDate) {
            if (startDate == null || endDate == null) {
                return false;
            }
            long currentTime = new Date().getTime();
            if (currentTime >= startDate.getTime() && currentTime <= endDate.getTime()) {
                return true;
            }
            return false;
        }
    
    
        /**
         * 得到二个日期间的间隔天数
         *
         * @param secondString：后一个日期
         * @param firstString：前一个日期
         * @return
         */
        public static String getTwoDay(String secondString, String firstString) {
            SimpleDateFormat myFormatter = new SimpleDateFormat(FORMAT_DATE_HORIZONTAL);
            long day;
            try {
                java.util.Date secondTime = myFormatter.parse(secondString);
                java.util.Date firstTime = myFormatter.parse(firstString);
                day = (secondTime.getTime() - firstTime.getTime()) / (24 * 60 * 60 * 1000);
            } catch (Exception e) {
                return "";
            }
            return day + "";
        }
    
    
        /**
         * 时间前推或后推分钟,其中JJ表示分钟.
         *
         * @param stringTime：时间
         * @param minute：分钟（有正负之分）
         * @return
         */
        public static String getPreTime(String stringTime, String minute) {
            String mydate;
            try {
                Date date = DATETIME_HORIZONTAL_THREAD_LOCAL_FORMAT.get().parse(stringTime);
                long time = (date.getTime() / 1000) + Integer.parseInt(minute) * 60;
                date.setTime(time * 1000);
                mydate = DATETIME_HORIZONTAL_THREAD_LOCAL_FORMAT.get().format(date);
            } catch (Exception e) {
                return "";
            }
            return mydate;
        }
    
    
        /**
         * 将短时间格式字符串转换为时间 yyyy-MM-dd
         *
         * @param strDate
         * @return
         */
        public static Date strToDate(String strDate) {
            return DATETIME_HORIZONTAL_THREAD_LOCAL_FORMAT.get().parse(strDate, new ParsePosition(0));
        }
    
    
        /**
         * 得到一个时间延后或前移几天的时间
         *
         * @param nowdate：时间
         * @param delay：前移或后延的天数
         * @return
         */
        public static String getNextDay(String nowdate, String delay) {
            try {
                SimpleDateFormat format = new SimpleDateFormat(FORMAT_DATETIME_HORIZONTAL);
                String mdate = "";
                Date d = strToDate(nowdate);
                long myTime = (d.getTime() / 1000) + Integer.parseInt(delay) * 24 * 60 * 60;
                d.setTime(myTime * 1000);
                mdate = format.format(d);
                return mdate;
            } catch (Exception e) {
                return "";
            }
        }
    
    
        /**
         * 判断是否闰年
         *
         * @param ddate
         * @return
         */
        public static boolean isLeapYear(String ddate) {
            /**
             * 详细设计： 1.被400整除是闰年，否则： 2.不能被4整除则不是闰年 3.能被4整除同时不能被100整除则是闰年
             * 3.能被4整除同时能被100整除则不是闰年
             */
            Date d = strToDate(ddate);
            GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
            gc.setTime(d);
            int year = gc.get(Calendar.YEAR);
            if ((year % 400) == 0 || ((year % 4) == 0 && (year % 100) != 0)) {
                return true;
            }
            return false;
    
        }
    
        /**
         * 判断二个时间是否在同一个周
         *
         * @param date1
         * @param date2
         * @return
         */
        public static boolean isSameWeekDates(Date date1, Date date2) {
            Calendar cal1 = Calendar.getInstance();
            Calendar cal2 = Calendar.getInstance();
            cal1.setTime(date1);
            cal2.setTime(date2);
            int subYear = cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR);
            if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)
                    &&
                    (0 == subYear || (1 == subYear && 11 == cal2.get(Calendar.MONTH)) || (-1 == subYear && 11 == cal1.get(Calendar.MONTH)))
            ) {
                return true;
            }
            return false;
        }
    
    
        /**
         * 产生周序列,即得到当前时间所在的年度是第几周
         *
         * @return
         */
        public static String getSeqWeek() {
            Calendar c = Calendar.getInstance(Locale.CHINA);
            String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR));
            if (week.length() == 1)
                week = "0" + week;
            String year = Integer.toString(c.get(Calendar.YEAR));
            return year + "年第" + week + "周";
        }
    
    
        /**
         * 获得一个日期所在的周的星期几的日期，如要找出2002年2月3日所在周的星期一是几号
         *
         * @param sdate：日期
         * @param num：星期几（星期天是一周的第一天）
         * @return
         */
        public static String getWeek(String sdate, String num) {
            // 再转换为时间
            Date dd = strToDate(sdate);
            Calendar c = Calendar.getInstance();
            c.setTime(dd);
            if (num.equals("1")) // 返回星期一所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
            else if (num.equals("2")) // 返回星期二所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.TUESDAY);
            else if (num.equals("3")) // 返回星期三所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);
            else if (num.equals("4")) // 返回星期四所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.THURSDAY);
            else if (num.equals("5")) // 返回星期五所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY);
            else if (num.equals("6")) // 返回星期六所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
            else if (num.equals("0")) // 返回星期日所在的日期
                c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
            return new SimpleDateFormat(FORMAT_DATE_HORIZONTAL).format(c.getTime());
        }
    
    
        /**
         * 根据一个日期，返回是星期几的字符串
         *
         * @param sdate
         * @return
         */
        public static String getWeek(String sdate) {
            // 再转换为时间
            Date date = strToDate(sdate);
            Calendar c = Calendar.getInstance();
            c.setTime(date);
            return new SimpleDateFormat("EEEE").format(c.getTime());
        }
    
    
        /**
         * 根据一个日期，返回是星期几的字符串
         *
         * @param sdate
         * @return
         */
        public static String getWeekStr(String sdate) {
            String str = "";
            str = getWeek(sdate);
            if ("1".equals(str)) {
                str = "星期日";
            } else if ("2".equals(str)) {
                str = "星期一";
            } else if ("3".equals(str)) {
                str = "星期二";
            } else if ("4".equals(str)) {
                str = "星期三";
            } else if ("5".equals(str)) {
                str = "星期四";
            } else if ("6".equals(str)) {
                str = "星期五";
            } else if ("7".equals(str)) {
                str = "星期六";
            }
            return str;
        }
    
    
        /**
         * 两个时间之间的天数
         *
         * @param date1
         * @param date2
         * @return
         */
        public static long getDays(String date1, String date2) throws ParseException {
            if (date1 == null || date1.equals(""))
                return 0;
            if (date2 == null || date2.equals(""))
                return 0;
            // 转换为标准时间
            SimpleDateFormat myFormatter = new SimpleDateFormat(FORMAT_DATE_HORIZONTAL);
            Date date = myFormatter.parse(date1);
            Date mydate = myFormatter.parse(date2);
            return (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
        }
    
    
        /**
         * 根据用户传入的时间表示格式，返回当前时间的格式 如果是yyyyMMdd，注意字母y不能大写
         *
         * @param format
         * @return
         */
        public static String getCurrentFormatDate(String format) {
            return new SimpleDateFormat(format).format(new Date());
        }
    
        /**
         * N天后
         *
         * @param current
         * @param days
         * @return java.util.date
         */
    
        public static Date plusDate(Date current, int days) {
            Calendar calendar = new GregorianCalendar();
            calendar.setTime(current);
            calendar.add(Calendar.DATE, days);
            return calendar.getTime();
        }
    
    }