java Date时间工具类

最近项目中遇到对时间处理的地方比较多,每次碰到处理时间格式问题的时候就要去翻翻找找感觉那样挺烦人的，所以为了方便接下来的开发我自己弄了个处理时间的工具类，需要的自取。


/*** 工具类-日期处理** @author xx* @version 1.0* @since 2014年1月28日*/
public class DateUtils {/*** 获得当前日期** @return*/public static Date getNow() {Calendar cal = Calendar.getInstance();Date currDate = cal.getTime();return currDate;}/*** 日期转换为字符串 格式自定义** @param date* @param f* @return*/public static String dateStr(Date date, String f) {if (date == null) {return "";}SimpleDateFormat format = new SimpleDateFormat(f);String str = format.format(date);return str;}/*** 日期转换为字符串 MM月dd日 hh:mm** @param date* @return*/public static String dateStr(Date date) {return dateStr(date, "MM月dd日 hh:mm");}/*** 日期转换为字符串 yyyy-MM-dd** @param date* @return*/public static String dateStr2(Date date) {return dateStr(date, "yyyy-MM-dd");}/*** yyyy年MM月dd日HH时mm分ss秒** @param date* @return*/public static String dateStr5(Date date) {return dateStr(date, "yyyy年MM月dd日 HH时mm分ss秒");}/*** yyyyMMddHHmmss** @param date* @return*/public static String dateStr3(Date date) {return dateStr(date, "yyyyMMddHHmmss");}/*** yyyy-MM-dd HH:mm:ss** @param date* @return*/public static String dateStr4(Date date) {return dateStr(date, "yyyy-MM-dd HH:mm:ss");}/*** yyyy年MM月dd日** @param date* @return*/public static String dateStr6(Date date) {return dateStr(date, "yyyy年MM月dd日");}/*** yyyyMMdd** @param date* @return*/public static String dateStr7(Date date) {return dateStr(date, "yyyyMMdd");}/*** MM-dd** @param date* @return*/public static String dateStr8(Date date) {return dateStr(date, "MM-dd");}/*** HH:mm** @param date* @return*/public static String dateStr9(Date date) {return dateStr(date, "HH:mm");}/*** 将时间戳转换为Date** @param times* @return*/public static Date getDate(String times) {long time = Long.parseLong(times);return new Date(time * 1000);}public static String dateStr(String times) {return dateStr(getDate(times));}public static String dateStr2(String times) {return dateStr2(getDate(times));}public static String dateStr3(String times) {return dateStr3(getDate(times));}public static String dateStr4(String times) {return dateStr4(getDate(times));}public static String dateStr5(String times) {return dateStr5(getDate(times));}/*** 将Date转换为时间戳** @param date* @return*/public static long getTime(Date date) {return date.getTime() / 1000;}public static int getDay(Date d) {Calendar cal = Calendar.getInstance();cal.setTime(d);return cal.get(Calendar.DAY_OF_MONTH);}/*** s - 表示 "yyyy-mm-dd" 形式的日期的 String 对象** @param* @return*/public static Date valueOf(String s) {final int YEAR_LENGTH = 4;final int MONTH_LENGTH = 2;final int DAY_LENGTH = 2;final int MAX_MONTH = 12;final int MAX_DAY = 31;int firstDash;int secondDash;int threeDash = 0;int fourDash = 0;Date d = null;if (s == null) {throw new IllegalArgumentException();}firstDash = s.indexOf('-');secondDash = s.indexOf('-', firstDash + 1);if (s.contains(":")) {threeDash = s.indexOf(':');fourDash = s.indexOf(':', threeDash + 1);}if ((firstDash > 0) && (secondDash > 0) && (secondDash < s.length() - 1)) {String yyyy = s.substring(0, firstDash);String mm = s.substring(firstDash + 1, secondDash);String dd = "";String hh = "";String MM = "";String ss = "";if (s.contains(":")) {dd = s.substring(secondDash + 1, threeDash - 3);hh = s.substring(threeDash - 2, threeDash);MM = s.substring(threeDash + 1, fourDash);ss = s.substring(fourDash + 1);} else {dd = s.substring(secondDash + 1);}if (yyyy.length() == YEAR_LENGTH && mm.length() == MONTH_LENGTH && dd.length() == DAY_LENGTH) {int year = Integer.parseInt(yyyy);int month = Integer.parseInt(mm);int day = Integer.parseInt(dd);int hour = 0;int minute = 0;int second = 0;if (s.contains(":")) {hour = Integer.parseInt(hh);minute = Integer.parseInt(MM);second = Integer.parseInt(ss);}if (month >= 1 && month <= MAX_MONTH) {int maxDays = MAX_DAY;switch (month) {// February determine if a leap year or notcase 2:if ((year % 4 == 0 && !(year % 100 == 0)) || (year % 400 == 0)) {maxDays = MAX_DAY - 2; // leap year so 29 days in// February} else {maxDays = MAX_DAY - 3; // not a leap year so 28 days// in February}break;// April, June, Sept, Nov 30 day monthscase 4:case 6:case 9:case 11:maxDays = MAX_DAY - 1;break;}if (day >= 1 && day <= maxDays) {Calendar cal = Calendar.getInstance();cal.set(year, month - 1, day, hour, minute, second);cal.set(Calendar.MILLISECOND, 0);d = cal.getTime();}}}}if (d == null) {throw new IllegalArgumentException();}return d;}/*** 获取指定日期星期几** @param dt* @return*/public static String getWeekOfDate(Date dt) {String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};Calendar cal = Calendar.getInstance();cal.setTime(dt);int w = cal.get(Calendar.DAY_OF_WEEK) - 1;if (w < 0) {w = 0;}return weekDays[w];}/*** 获取指定日期星期几(int)** @param dt* @return*/public static int getWeekOfInt(Date dt) {int[] weekDays = {7, 1, 2, 3, 4, 5, 6};Calendar cal = Calendar.getInstance();cal.setTime(dt);int w = cal.get(Calendar.DAY_OF_WEEK) - 1;if (w < 0) {w = 0;}return weekDays[w];}/*** 前/后?分钟** @param d* @param minute* @return*/public static Date rollMinute(Date d, int minute) {return new Date(d.getTime() + minute * 60 * 1000);}/*** 前/后?天** @param d* @param day* @return*/public static Date rollDay(Date d, int day) {Calendar cal = Calendar.getInstance();cal.setTime(d);cal.add(Calendar.DAY_OF_MONTH, day);return cal.getTime();}/*** 前/后?月** @param d* @param mon* @return*/public static Date rollMon(Date d, int mon) {Calendar cal = Calendar.getInstance();cal.setTime(d);cal.add(Calendar.MONTH, mon);return cal.getTime();}/*** 前/后?年** @param d* @param year* @return*/public static Date rollYear(Date d, int year) {Calendar cal = Calendar.getInstance();cal.setTime(d);cal.add(Calendar.YEAR, year);return cal.getTime();}public static Date rollDate(Date d, int year, int mon, int day) {Calendar cal = Calendar.getInstance();cal.setTime(d);cal.add(Calendar.YEAR, year);cal.add(Calendar.MONTH, mon);cal.add(Calendar.DAY_OF_MONTH, day);return cal.getTime();}/*** 获取当前时间-时间戳字符串** @return*/public static String getNowTimeStr() {String str = Long.toString(System.currentTimeMillis() / 1000);return str;}/*** 获取当前时间-时间戳** @return*/public static int getNowTime() {return Integer.parseInt(StringUtils.isNull(System.currentTimeMillis() / 1000));}/*** 将Date转换为时间戳** @param time* @return*/public static String getTimeStr(Date time) {long date = time.getTime();String str = Long.toString(date / 1000);return str;}public static String getTimeStr(String dateStr, String format) {SimpleDateFormat sdf = new SimpleDateFormat(format);Date date;try {date = sdf.parse(dateStr);} catch (Exception e) {e.printStackTrace();return "";}String str = DateUtils.getTimeStr(date);return str;}public static Date getIntegralTime() {Calendar cal = Calendar.getInstance();cal.set(Calendar.HOUR_OF_DAY, 0);cal.set(Calendar.SECOND, 0);cal.set(Calendar.MINUTE, 0);cal.set(Calendar.MILLISECOND, 0);return cal.getTime();}/*** 获取当天23:59:59** @return*/public static Date getLastIntegralTime() {Calendar cal = Calendar.getInstance();cal.set(Calendar.HOUR_OF_DAY, 23);cal.set(Calendar.SECOND, 59);cal.set(Calendar.MINUTE, 59);cal.set(Calendar.MILLISECOND, 0);return cal.getTime();}/*** 设置时间格式为 23:59:59** @return*/public static Date getLastSecIntegralTime(Date d) {Calendar cal = Calendar.getInstance();cal.setTimeInMillis(d.getTime());cal.set(Calendar.HOUR_OF_DAY, 23);cal.set(Calendar.SECOND, 59);cal.set(Calendar.MINUTE, 59);cal.set(Calendar.MILLISECOND, 0);return cal.getTime();}/*** 获取本周日的日期*/public static String getCurrentWeekday() {int weeks = 0;int mondayPlus = DateUtils.getMondayPlus();GregorianCalendar currentDate = new GregorianCalendar();currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);Date monday = currentDate.getTime();DateFormat df = DateFormat.getDateInstance();String preMonday = df.format(monday);return preMonday;}/*** 获取时间戳** @param format 日期时间* @return*/public static long getTime(String format) {long t = 0;if (StringUtils.isBlank(format)) {return t;}SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date date;try {date = sdf.parse(format);t = date.getTime() / 1000;} catch (Exception e) {e.printStackTrace();}return t;}/*** 获得当前日期与本周日相差的天数*/private static int getMondayPlus() {Calendar cd = Calendar.getInstance();// 获得今天是一周的第几天，星期日是第一天，星期二是第二天......int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1;// 因为按中国礼拜一作为第一天所以这里减1if (dayOfWeek == 1) {return 0;} else {return 1 - dayOfWeek;}}/*** 获得本周一的日期** @return*/public static String getMondayOFWeek() {int weeks = 0;int mondayPlus = DateUtils.getMondayPlus();GregorianCalendar currentDate = new GregorianCalendar();currentDate.add(GregorianCalendar.DATE, mondayPlus);Date monday = currentDate.getTime();DateFormat df = DateFormat.getDateInstance();String preMonday = df.format(monday);return preMonday;}/*** 获取当前月第一天：*/public static String getFirstDayOfMonth(String first) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");Calendar c = Calendar.getInstance();c.add(Calendar.MONTH, 0);// 设置为1号,当前日期既为本月第一天c.set(Calendar.DAY_OF_MONTH, 1);first = format.format(c.getTime());return first;}/*** 获取当月最后一天*/public static String getLastDayOfMonth(String last) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");Calendar ca = Calendar.getInstance();ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));last = format.format(ca.getTime());return last;}/*** 获取当月最后一天 天数*/public static Integer getLastDayOfMonthInt(Date date) {Calendar ca = Calendar.getInstance();ca.setTime(date);return ca.get(Calendar.DATE);}/*** 日期月份处理** @param d     时间* @param month 相加的月份，正数则加，负数则减* @return*/public static Date timeMonthManage(Date d, int month) {Calendar rightNow = Calendar.getInstance();rightNow.setTime(d);rightNow.add(Calendar.MONTH, month);return rightNow.getTime();}/*** 获取指定年月的最后一天** @param year_time  指定年* @param month_time 指定月* @return*/public static Date monthLastDay(int year_time, int month_time) {Calendar cal = Calendar.getInstance();cal.set(year_time, month_time, 0, 23, 59, 59);return cal.getTime();}/*** 获取指定年月的第一天** @param year_time  指定年* @param month_time 指定月* @return*/public static Date monthFirstDay(int year_time, int month_time) {Calendar cal = Calendar.getInstance();cal.set(year_time, month_time - 1, 1, 0, 0, 0);return cal.getTime();}/*** 获取指定时间月的第一天** @param d 指定时间，为空代表当前时间* @return*/public static Date currMonthFirstDay(Date d) {Calendar cal = Calendar.getInstance();if (d != null) {cal.setTime(d);}cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 0, 0, 0);return cal.getTime();}/*** 获取指定时间月的最后一天** @param d 指定时间，为空代表当前时间* @return*/public static Date currMonthLastDay(Date d) {Calendar cal = Calendar.getInstance();if (d != null)cal.setTime(d);cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 23, 59, 59);return cal.getTime();}/*** 获取指定时间的年** @param date 指定时间* @return*/public static int getTimeYear(Date date) {if (date == null) {date = new Date();}Calendar cal = Calendar.getInstance();cal.setTime(date);return cal.get(Calendar.YEAR);}/*** 获取指定时间的月** @param date 指定时间* @return*/public static int getTimeMonth(Date date) {if (date == null) {date = new Date();}Calendar cal = Calendar.getInstance();cal.setTime(date);return cal.get(Calendar.MONTH) + 1;}/*** 获取指定时间的天** @param date 指定时间* @return*/public static int getTimeDay(Date date) {if (date == null)date = new Date();Calendar cal = Calendar.getInstance();cal.setTime(date);return cal.get(Calendar.DATE);}public static Date getFirstSecIntegralTime(Date d) {Calendar cal = Calendar.getInstance();cal.setTimeInMillis(d.getTime());cal.set(Calendar.HOUR_OF_DAY, 0);cal.set(Calendar.SECOND, 0);cal.set(Calendar.MINUTE, 0);cal.set(Calendar.MILLISECOND, 0);cal.set(Calendar.DATE, 0);return cal.getTime();}/*** 获取指定时间天的结束时间** @param d* @return*/public static Date getDayEndTime(long d) {Date day = null;if (d <= 0) {day = new Date();} else {day = new Date(d * 1000);}Calendar cal = Calendar.getInstance();if (day != null) {cal.setTimeInMillis(day.getTime());}cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 23, 59, 59);return cal.getTime();}/*** 获取指定时间天的开始时间** @param d* @return*/public static Date getDayStartTime(long d) {Date day = null;if (d <= 0) {day = new Date();} else {day = new Date(d * 1000);}Calendar cal = Calendar.getInstance();if (day != null) {cal.setTimeInMillis(day.getTime());}cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 0, 0, 0);return cal.getTime();}/*** 获取19位的格式时间** @param dateStr* @return* @throws*/public static Date getDateByFullDateStr(String dateStr) {try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return sdf.parse(dateStr);} catch (Exception e) {e.printStackTrace();return null;}}/*** 获取16位的格式时间 yyyy-MM-dd HH:mm** @param dateStr* @return* @throws Exception*/public static Date getDateByStr(String dateStr) {try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");return sdf.parse(dateStr);} catch (Exception e) {e.printStackTrace();return null;}}/*** 获取yyyy-MM-dd的格式时间** @param dateStr* @return* @throws*/public static Date getDateByDateStr(String dateStr) {try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");return sdf.parse(dateStr);} catch (Exception e) {e.printStackTrace();return null;}}/*** 获取两个日期相差的月数** @param d1 较大的日期* @param d2 较小的日期* @return 如果d1>d2返回 月数差 否则返回0*/public static int monthsBetween(Date d1, Date d2) {Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();c1.setTime(d1);c2.setTime(d2);if (c1.getTimeInMillis() < c2.getTimeInMillis()) {return 0;}int year1 = c1.get(Calendar.YEAR);int year2 = c2.get(Calendar.YEAR);int month1 = c1.get(Calendar.MONTH);int month2 = c2.get(Calendar.MONTH);int day1 = c1.get(Calendar.DAY_OF_MONTH);int day2 = c2.get(Calendar.DAY_OF_MONTH);// 获取年的差值 假设 d1 = 2015-8-16  d2 = 2011-9-30int yearInterval = year1 - year2;// 如果 d1的 月-日 小于 d2的 月-日 那么 yearInterval-- 这样就得到了相差的年数if (month1 < month2 || month1 == month2 && day1 < day2) {yearInterval--;}// 获取月数差值int monthInterval = (month1 + 12) - month2;if (day1 < day2) {monthInterval--;}monthInterval %= 12;return yearInterval * 12 + monthInterval;}/*** 计算date2 - date1之间相差的天数** @param date1* @param date2* @return*/public static int daysBetween(Date date1, Date date2) {DateFormat sdf = new SimpleDateFormat("yyyyMMdd");Calendar cal = Calendar.getInstance();try {Date d1 = sdf.parse(DateUtils.dateStr7(date1));Date d2 = sdf.parse(DateUtils.dateStr7(date2));cal.setTime(d1);long time1 = cal.getTimeInMillis();cal.setTime(d2);long time2 = cal.getTimeInMillis();return Integer.parseInt(String.valueOf((time2 - time1) / 86400000L));} catch (Exception e) {e.printStackTrace();}return 0;}/*** 计算date2 - date1之间相差的分钟** @param date1* @param date2* @return*/public static int minutesBetween(Date date1, Date date2) {Calendar cal = Calendar.getInstance();cal.setTime(date1);long time1 = cal.getTimeInMillis();cal.setTime(date2);long time2 = cal.getTimeInMillis();if (time2 - time1 <= 0) {return 0;} else {return Integer.parseInt(String.valueOf((time2 - time1) / 60000L)) + 1;}}/*** 计算date2 - date1之间相差的秒** @param date1* @param date2* @return*/public static int secondBetween(Date date1, Date date2) {Calendar cal = Calendar.getInstance();cal.setTime(date1);long time1 = cal.getTimeInMillis();cal.setTime(date2);long time2 = cal.getTimeInMillis();if (time2 - time1 <= 0) {return 0;} else {return Integer.parseInt(String.valueOf((time2 - time1) / 1000L)) + 1;}}/*** 计算date2 - date1之间相差的毫秒** @param date1* @param date2* @return*/public static int millisecondBetween(Date date1, Date date2) {Calendar cal = Calendar.getInstance();cal.setTime(date1);long time1 = cal.getTimeInMillis();cal.setTime(date2);long time2 = cal.getTimeInMillis();if (time2 - time1 <= 0) {return 0;} else {return Integer.parseInt(String.valueOf((time2 - time1)));}}/*** 获取当月开始时间*/public static Date getMonthStartTime() {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");Calendar cal = Calendar.getInstance();Date nowdate = cal.getTime();String date1 = sdf.format(nowdate);date1 += "-01 00:00:00";try {SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return sdf2.parse(date1);} catch (Exception e) {e.printStackTrace();return null;}}/*** 获取当月开始时间Str*/public static String getMonthStartTimeStr() {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");Calendar cal = Calendar.getInstance();Date nowdate = cal.getTime();String date = sdf.format(nowdate);date += "-01 00:00:00";return date;}/*** 获取当月结束时间*/public static Date getMonthEndTime() {Calendar calendar = Calendar.getInstance();// 设置日期为本月最大日期calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DATE));// 打印DateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd");calendar.getTime();String date1 = sdf1.format(calendar.getTime());date1 += " 23:59:59";SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");try {return sdf2.parse(date1);} catch (Exception e) {e.printStackTrace();}return null;}/*** 根据当前日期计算今年剩余天数** @return*/public static int getLeftDaysOfCurrYear() {return daysBetween(new Date(), getCurrYearLast());}/*** 获取当年的最后一天** @return*/public static Date getCurrYearLast() {Calendar currCal = Calendar.getInstance();int currentYear = currCal.get(Calendar.YEAR);return getYearLast(currentYear);}/*** 获取某年最后一天日期** @param year 年份* @return Date*/public static Date getYearLast(int year) {Calendar calendar = Calendar.getInstance();calendar.clear();calendar.set(Calendar.YEAR, year);calendar.roll(Calendar.DAY_OF_YEAR, -1);Date currYearLast = calendar.getTime();return currYearLast;}/*** 根据出生日期计算年龄** @param birthday 出生日期* @return*/public static int getAge(Date birthday) {int age = 0;Calendar born = Calendar.getInstance();Calendar now = Calendar.getInstance();if (birthday != null) {now.setTime(new Date());born.setTime(birthday);if (born.after(now)) {throw new IllegalArgumentException("年龄不能超过当前日期");}age = now.get(Calendar.YEAR) - born.get(Calendar.YEAR);int nowDayOfYear = now.get(Calendar.DAY_OF_YEAR);int bornDayOfYear = born.get(Calendar.DAY_OF_YEAR);if (nowDayOfYear < bornDayOfYear) {age -= 1;}}return age;}/*** 判断当前时间是否是否 3:00过后  如果当前时间是交易时间段** @return*/public static boolean checkedTransactionTime() {Date da = new Date();SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");String now = sdf.format(da);Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();try {c1.setTime(sdf.parse(now));c2.setTime(sdf.parse("15:00:00"));} catch (ParseException e) {e.printStackTrace();}if ((c1.compareTo(c2) > 0)) {return false;}return true;}/*** 判断当前时间是否是否 2:30前** @return*/public static boolean checkedTransactionTowTime() {Date da = new Date();SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");String now = sdf.format(da);Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();try {c1.setTime(sdf.parse(now));c2.setTime(sdf.parse("14:30:00"));} catch (ParseException e) {e.printStackTrace();}if ((c1.compareTo(c2) > 0)) {return false;}return true;}/*** 日期转换为字符串 格式自定义** @param date* @param f* @return*/public static Date dateFormat(Date date, String f) {Date date1 = new Date();if (date == null) {return null;}SimpleDateFormat format = new SimpleDateFormat(f);String str = format.format(date);try {date1 = format.parse(str);} catch (ParseException e) {e.printStackTrace();}return date1;}public static void main(String[] args) throws Exception {System.out.println(checkedTransactionTowTime());System.out.println(dateStr(rollMon(new Date(), 1), "yyyy-MM-dd"));System.out.println(dateFormat(new Date(), "yyyy-MM-dd"));}}

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