package com.kingdee.shr.customer.gtiit.util; import java.sql.Timestamp; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.List; /** * 日期工具类 * * @author Administrator * */ public class DateTimeUtils { public static String getDateByWeek(int week) { Calendar calendar = Calendar.getInstance(); calendar.setFirstDayOfWeek(Calendar.MONDAY); calendar.set(Calendar.WEEK_OF_YEAR, week); calendar.set(Calendar.DAY_OF_WEEK, 1);// 2为星期一，1为星期天 SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd"); return sdf.format(calendar.getTime()); } public static int getMouthByWeek(int week) { Calendar calendar = Calendar.getInstance(); calendar.setFirstDayOfWeek(Calendar.MONDAY); calendar.set(Calendar.WEEK_OF_YEAR, week); calendar.set(Calendar.DAY_OF_WEEK, 7); return calendar.get(Calendar.MONTH) + 1; } /** * 获取一年有多少周 * @param date * @return */ public static int getAllWeeks(Date date) { Calendar calendar = Calendar.getInstance(); calendar.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 calendar.setTime(date); int week = calendar.get(Calendar.WEEK_OF_YEAR); if(week != 53){ week = 52; } return week; } /** * 获取某年的第几周的开始日期 * @param year * @param week * @return */ public static Date getFirstDayOfWeek(int year, int week) { Calendar c = new GregorianCalendar(); c.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 c.set(Calendar.YEAR, year); c.set(Calendar.MONTH, Calendar.JANUARY); c.set(Calendar.DATE, 1); Calendar cal = (GregorianCalendar) c.clone(); cal.add(Calendar.DATE, week * 7); return getFirstDayOfWeek(cal.getTime()); } /** * 获取某年的第几周的结束日期 * @param year * @param week * @return */ public static Date getLastDayOfWeek(int year, int week) { Calendar c = new GregorianCalendar(); c.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 c.set(Calendar.YEAR, year); c.set(Calendar.MONTH, Calendar.JANUARY); c.set(Calendar.DATE, 1); Calendar cal = (GregorianCalendar) c.clone(); cal.add(Calendar.DATE, week * 7); return getLastDayOfWeek(cal.getTime()); } /** * 获取当前时间所在周的开始日期 * @param date * @return */ public static Date getFirstDayOfWeek(Date date) { Calendar c = new GregorianCalendar(); c.setFirstDayOfWeek(Calendar.MONDAY); c.setTime(date); c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek()); // Monday return c.getTime(); } /** * 获取当前时间所在周的结束日期 * @param date * @return */ public static Date getLastDayOfWeek(Date date) { Calendar c = new GregorianCalendar(); c.setFirstDayOfWeek(Calendar.MONDAY); c.setTime(date); c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6); // Sunday return c.getTime(); } /** * 获取时间在第几周 * * @param date * @return */ public static int getweekOfYear(Date date) { Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 calendar.setMinimalDaysInFirstWeek(4);// 可以不用设置 //calendar.setTimeInMillis(System.currentTimeMillis());// 获得当前的时间戳 int weekOfYear = calendar.get(Calendar.WEEK_OF_YEAR);// 获得当前日期属于今年的第几周 return weekOfYear; } /** * 获取日期的本周的开始时间 * * @param date * @return */ public static Date getBeginDayOfWeek(Date date) { Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 cal.setTime(date); int day_of_week = cal.get(Calendar.DAY_OF_WEEK) - 1; if (day_of_week == 0) day_of_week = 7; cal.add(Calendar.DATE, -day_of_week + 1); return getDayStartTime(cal.getTime()); } /** * 获取本周的结束时间 * * @return */ public static Date getEndDayOfWeek(Date date) { Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 cal.setTime(getBeginDayOfWeek(date)); cal.add(Calendar.DAY_OF_WEEK, 6); Date weekEndSta = cal.getTime(); return getDayEndTime(weekEndSta); } /** * 向推count周的结束时间 * * @param date * @param count * @return */ public static Date getEndDayOfWeekcount(Date date, int count) { Calendar calendar = Calendar.getInstance(); calendar.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 calendar.setTime(date); calendar.setTime(getBeginDayOfWeek(date)); calendar.add(Calendar.DATE, (count - 1) * 7 + 6); return getEndDayOfWeek(calendar.getTime()); } /** * 返回昨天 * * @param today * @return */ public static Date yesterday(Date today) { Calendar calendar = Calendar.getInstance(); calendar.setTime(today); calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 1); return calendar.getTime(); } /** * 返回明天 * * @param today * @return */ public static Date tomorrow(Date today) { Calendar calendar = Calendar.getInstance(); calendar.setTime(today); calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + 1); return calendar.getTime(); } /** * 获取当天的开始时间 * * @return */ public static Date getDayBegin(Date date) { Calendar cal = new GregorianCalendar(); cal.setTime(date); cal.set(Calendar.HOUR_OF_DAY, 0); cal.set(Calendar.MINUTE, 0); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MILLISECOND, 0); return cal.getTime(); } /** * 获取当天的结束时间 * * @return */ public static Date getDayEnd(Date date) { Calendar cal = new GregorianCalendar(); cal.setTime(date); cal.set(Calendar.HOUR_OF_DAY, 23); cal.set(Calendar.MINUTE, 59); cal.set(Calendar.SECOND, 59); return cal.getTime(); } /** * 获取当天的开始时间 * * @return */ public static Date getDayBegin() { Calendar cal = new GregorianCalendar(); cal.set(Calendar.HOUR_OF_DAY, 0); cal.set(Calendar.MINUTE, 0); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MILLISECOND, 0); return cal.getTime(); } /** * 获取当天的结束时间 * * @return */ public static Date getDayEnd() { Calendar cal = new GregorianCalendar(); cal.set(Calendar.HOUR_OF_DAY, 23); cal.set(Calendar.MINUTE, 59); cal.set(Calendar.SECOND, 59); return cal.getTime(); } /** * 获取昨天的开始时间 * * @return */ public static Date getBeginDayOfYesterday() { Calendar cal = new GregorianCalendar(); cal.setTime(getDayBegin()); cal.add(Calendar.DAY_OF_MONTH, -1); return cal.getTime(); } /** * 获取昨天的结束时间 * * @return */ public static Date getEndDayOfYesterDay() { Calendar cal = new GregorianCalendar(); cal.setTime(getDayEnd()); cal.add(Calendar.DAY_OF_MONTH, -1); return cal.getTime(); } /** * 获取明天的开始时间 * * @return */ public static Date getBeginDayOfTomorrow() { Calendar cal = new GregorianCalendar(); cal.setTime(getDayBegin()); cal.add(Calendar.DAY_OF_MONTH, 1); return cal.getTime(); } /** * 获取明天的结束时间 * * @return */ public static Date getEndDayOfTomorrow() { Calendar cal = new GregorianCalendar(); cal.setTime(getDayEnd()); cal.add(Calendar.DAY_OF_MONTH, 1); return cal.getTime(); } /** * 获取本周的开始时间 * * @return */ public static Date getBeginDayOfWeek() { Date date = new Date(); Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 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 */ public static Date getEndDayOfWeek() { Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 cal.setTime(getBeginDayOfWeek()); cal.add(Calendar.DAY_OF_WEEK, 6); Date weekEndSta = cal.getTime(); return getDayEndTime(weekEndSta); } /** * 获取上周的开始时间 * * @return */ public static Date getBeginDayOfLastWeek() { Date date = new Date(); Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 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 */ public static Date getEndDayOfLastWeek() { Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 cal.setTime(getBeginDayOfLastWeek()); cal.add(Calendar.DAY_OF_WEEK, 6); Date weekEndSta = cal.getTime(); return getDayEndTime(weekEndSta); } /** * 下周一 * * @param date * @return */ public static Date getNextWeekMonday(Date date) { Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 cal.setTime(getEndDayOfWeek()); cal.add(Calendar.DATE, 1); return cal.getTime(); } /** * 下周日 * * @param date * @return */ public static Date getNextWeekSunday(Date date) { Calendar cal = Calendar.getInstance(); cal.setFirstDayOfWeek(Calendar.MONDAY);// 设置星期一为一周开始的第一天 cal.setTime(getNextWeekMonday(date)); cal.add(Calendar.DATE, 6); return cal.getTime(); } /** * 获取本月的开始时间 * * @return */ public static Date getBeginDayOfMonth() { Calendar calendar = Calendar.getInstance(); calendar.set(getNowYear(), getNowMonth() - 1, 1); return getDayStartTime(calendar.getTime()); } /** * 获取年份和月份 * @param year * @param month * @return */ public static Date getMonth(int year, int month) { Calendar c = new GregorianCalendar(); c.set(Calendar.YEAR, year); c.set(Calendar.MONTH,month); return c.getTime(); } /** * 获取时间在第几周 * * @param date * @return */ public static int getMonthOfYear(Date date) { Calendar calendar = Calendar.getInstance(); calendar.setTime(date); int weekOfYear = calendar.get(Calendar.MONTH)+1;// 获得当前日期属于今年的第几月 return weekOfYear; } /** * 获取本月的开始时间 * * @return */ public static Date getBeginDayOfMonth(Date date) { Calendar calendar = Calendar.getInstance(); calendar.set(getNowYear(date), getNowMonth(date) - 1, 1); return getDayStartTime(calendar.getTime()); } /** * 获取本月的结束时间 * * @return */ 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()); } /** * 获取本月的结束时间 * * @return */ public static Date getEndDayOfMonth(Date date) { Calendar calendar = Calendar.getInstance(); calendar.set(getNowYear(date), getNowMonth(date) - 1, 1); int day = calendar.getActualMaximum(5); calendar.set(getNowYear(date), getNowMonth(date) - 1, day); return getDayEndTime(calendar.getTime()); } /** * 获取上月的开始时间 * * @return */ 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 */ 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()); } /** * 获取下月的开始时间 * * @return */ public static Date getBeginDayOFNextMonth() { Calendar calendar = Calendar.getInstance(); calendar.set(getNowYear(), getNowMonth() + 0, 1); return getDayStartTime(calendar.getTime()); } /** * 获取下月的结束时间 * * @return */ public static Date getEndDayOfNextMonth() { Calendar calendar = Calendar.getInstance(); calendar.set(getNowYear(), getNowMonth() + 0, 1); int day = calendar.getActualMaximum(5); calendar.set(getNowYear(), getNowMonth() + 0, day); return getDayEndTime(calendar.getTime()); } /** * 获取过去三个月的开始时间 ，结束时间为上个月的结束时间getEndDayOfLastMonth() * * @return */ public static Date getBeginDayOfThreeMonth() { Calendar calendar = Calendar.getInstance(); calendar.set(getNowYear(), getNowMonth() - 4, 1); return getDayStartTime(calendar.getTime()); } /** * 获取未来三个月的结束时间 ，开始时间为下个月的开始时间getBeginDayOFNextMonth() * * @return */ public static Date getEndDayOfThreeMonth() { 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()); } /** * 上季度的开始时间 * * @return */ public static Date getBeginDayOfLastQuarter() { Calendar cal = Calendar.getInstance(); cal.setTime(getBeginDayOfThisQuarter()); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 3); // cal.set(Calendar.DATE, // getLastDayOfMonth(cal.get(Calendar.YEAR),cal.get(Calendar.MONTH)+1)); return getDayStartTime(cal.getTime()); } /** * 上季度的结束时间 * * @return */ public static Date getEndDayOfLastQuarter() { Calendar cal = Calendar.getInstance(); cal.setTime(getBeginDayOfThisQuarter()); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 本季度的开始时间 * * @return */ public static Date getBeginDayOfThisQuarter() { Calendar cal = Calendar.getInstance(); cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), 00, 00, 00); int currentMonth = cal.get(Calendar.MONTH) + 1; try { if (currentMonth >= 1 && currentMonth <= 3) { cal.set(Calendar.MONTH, 0); } else if (currentMonth >= 4 && currentMonth <= 6) { cal.set(Calendar.MONTH, 3); } else if (currentMonth >= 7 && currentMonth <= 9) { cal.set(Calendar.MONTH, 6); } else if (currentMonth >= 10 && currentMonth <= 12) { cal.set(Calendar.MONTH, 9); } cal.set(Calendar.DATE, 1); } catch (Exception e) { e.printStackTrace(); } return getDayStartTime(cal.getTime()); } /** * 本季度的结束时间 * * @return */ public static Date getEndDayOfThisQuarter() { Calendar cal = Calendar.getInstance(); cal.setTime(getBeginDayOfThisQuarter()); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + 2); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 下季度的开始时间 * * @return */ public static Date getBeginDayOfNextQuarter() { Calendar cal = Calendar.getInstance(); cal.setTime(getBeginDayOfThisQuarter()); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + 3); // cal.set(Calendar.DATE, // getLastDayOfMonth(cal.get(Calendar.YEAR),cal.get(Calendar.MONTH)+1)); return getDayStartTime(cal.getTime()); } /** * 下季度的结束时间 * * @return */ public static Date getEndDayOfNextQuarter() { Calendar cal = Calendar.getInstance(); cal.setTime(getBeginDayOfNextQuarter()); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + 2); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 获取去年时间 * @param date * @return */ public static Date getLastYear(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.YEAR, -1); return cal.getTime(); } /** * 获取去年的开始时间 * * @return */ public static Date getBeginDayOfLastYear() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, getNowYear() - 1); cal.set(Calendar.MONTH, Calendar.JANUARY); cal.set(Calendar.DATE, 1); return getDayStartTime(cal.getTime()); } /** * 获取去年的结束时间 * * @return */ public static Date getEndDayOfLastYear() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, getNowYear() - 1); cal.set(Calendar.MONTH, Calendar.DECEMBER); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 获取今年的开始时间 * * @return */ 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()); } /** * 获取今年的开始时间 * * @param date * @return */ public static Date getBeginDayOfYear(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.set(Calendar.YEAR, getNowYear(date)); cal.set(Calendar.MONTH, Calendar.JANUARY); cal.set(Calendar.DATE, 1); return getDayStartTime(cal.getTime()); } /** * 获取今年的结束时间 * * @return */ public static Date getEndDayOfYear() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, getNowYear()); cal.set(Calendar.MONTH, Calendar.DECEMBER); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 获取今年的结束时间 * @param date * @return */ public static Date getEndDayOfYear(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.set(Calendar.YEAR, getNowYear(date)); cal.set(Calendar.MONTH, Calendar.DECEMBER); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 获取明年的开始时间 * * @return */ public static Date getBeginDayOfNextYear() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, getNowYear() + 1); cal.set(Calendar.MONTH, Calendar.JANUARY); cal.set(Calendar.DATE, 1); return getDayStartTime(cal.getTime()); } /** * 获取明年的结束时间 * * @return */ public static Date getEndDayOfNextYear() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, getNowYear() + 1); cal.set(Calendar.MONTH, Calendar.DECEMBER); cal.set(Calendar.DATE, getLastDayOfMonth(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1)); return getDayEndTime(cal.getTime()); } /** * 获取某个日期的开始时间 * * @param d * @return */ 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 * @return */ 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()); } /** * 获取今年是哪一年 * * @return */ public static Integer getNowYear() { Date date = new Date(); GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance(); gc.setTime(date); return Integer.valueOf(gc.get(1)); } /** * 获取今年是哪一年 * * @return */ public static Integer getNowYear(Date date) { GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance(); gc.setTime(date); return Integer.valueOf(gc.get(1)); } /** * 获取本月是哪一月 * * @return */ public static int getNowMonth() { Date date = new Date(); GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance(); gc.setTime(date); return gc.get(2) + 1; } /** * 获取本月是哪一月 * * @return */ public static int getNowMonth(Date date) { GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance(); gc.setTime(date); return gc.get(2) + 1; } /** * 两个日期相减得到的天数 * * @param beginDate * @param endDate * @return */ public static int getDiffDays(Date beginDate, Date endDate) { if (beginDate == null || endDate == null) { throw new IllegalArgumentException("getDiffDays param is null!"); } long diff = (endDate.getTime() - beginDate.getTime()) / (1000 * 60 * 60 * 24); int days = new Long(diff).intValue(); return days; } /** * 两个日期相减得到的毫秒数 * * @param beginDate * @param endDate * @return */ 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期 * * @param beginDate * @param endDate * @return */ public static Date max(Date beginDate, Date endDate) { if (beginDate == null) { return endDate; } if (endDate == null) { return beginDate; } if (beginDate.after(endDate)) { return beginDate; } return endDate; } /** * 获取两个日期中的最小日期 * * @param beginDate * @param endDate * @return */ 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; } /** * 返回某月该季度的第一个月 * * @param date * @return */ public static Date getFirstSeasonDate(Date date) { final int[] SEASON = { 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4 }; Calendar cal = Calendar.getInstance(); cal.setTime(date); int sean = SEASON[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; } /** * 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; } public static int getLastDayOfMonth(int year, int month) { Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.YEAR, year); calendar.set(Calendar.MONTH, month - 1); calendar.set(Calendar.DAY_OF_MONTH, 1); calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DATE)); return calendar.get(Calendar.DATE); } /** * 日期格式的计算 * * @param smdate * 较小的时间 * @param bdate * 较大的时间 * @return 相差天数 * @throws ParseException */ public static int daysBetween(Date smdate, Date bdate) throws ParseException { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); smdate = sdf.parse(sdf.format(smdate)); bdate = sdf.parse(sdf.format(bdate)); Calendar cal = Calendar.getInstance(); cal.setTime(smdate); long time1 = cal.getTimeInMillis(); cal.setTime(bdate); long time2 = cal.getTimeInMillis(); long between_days = (time2 - time1) / (1000 * 3600 * 24); return Integer.parseInt(String.valueOf(between_days)); } /** * 将指定的日期字符串转换成日期 * * @param dateStr * 日期字符串 * 格式 * @return 日期对象 */ public static Date parseDate(String dateStr) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date date; try { date = sdf.parse(dateStr); } catch (ParseException e) { throw new RuntimeException("日期转化错误"); } return date; } public static Date parseDate(String dateStr, String format) { SimpleDateFormat sdf = new SimpleDateFormat(format); Date date; try { date = sdf.parse(dateStr); } catch (ParseException e) { throw new RuntimeException("日期转化错误"); } return date; } /** * 日期转指定类型字符串 * @param date 日期 * @param format 字符串类型 * @return format类型的字符串 如：yyyy-mm-dd/yyyymmdd等 */ public static String dateFormat(Date date,String format) { if (date == null) { return null; } SimpleDateFormat sdf = new SimpleDateFormat(format); String strDate = sdf.format(date); return strDate; } }