本文章主要用于Java实现时间的各种格式的输入要求
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;/*** <p>* <p>Title:DateUtil.java</p >* <p>Description: 用于时间格式化的工具类</p >* <p>Date:2020/5/27 11:24</p >** @version 1.0*/
public class DateUtil {public static final String FORMAT = "yyyy-MM-dd HH:mm:ss";public static final String FORMAT_DAYTIME = "yyyy-MM-dd HH:mm:ss";public static final String FORMAT_DAY = "yyyy-MM-dd";public static final String FORMAT_TIME = "HH:mm:ss";public static final String FORMAT_TIME_SHORT = "HH:mm";public static final String FORMAT_DAY_HOUR_MIN = "yyyy-MM-dd HH:mm";public static final String FORMAT_YYYYMM = "yyyyMM";public static final String FORMAT_YYYY = "yyyy";public static final String FORMAT_YYYYMMDD = "yyyyMMdd";public static final String FORMAT_DAY_CN = "yyyy年MM月dd日";public static final String FORMAT_DAY_CN_HM = "yyyy年MM月dd日HH:mm";public static final String FORMAT_DAY_SLASH = "yyyy/MM/dd";public static final String FORMAT_DAY_CN_MD = "MM月dd日";public static final String FORMAT_DAY_CN_MM = "MM月";public static final String FORMAT_YYYY_MM = "yyyy-MM";public static String addOneDay(String dateStr, String format) {SimpleDateFormat formatter = new SimpleDateFormat(format);ParsePosition pos = new ParsePosition(0);Date d = formatter.parse(dateStr, pos);Calendar calendar = Calendar.getInstance();calendar.setTime(d);calendar.add(Calendar.DATE, 1);d = calendar.getTime();return formatter.format(d);}public static Long getTimeSecond(String timeStr) {if (timeStr.length() == 0) {return new Long(0);}Long hour = Long.parseLong(timeStr.substring(0, (timeStr.length() - 6)), 10);Long min = Long.parseLong(timeStr.substring((timeStr.length() - 5), (timeStr.length() - 3)), 10);Long sec = Long.parseLong(timeStr.substring((timeStr.length() - 2)), 10);Long second = hour * 3600 + min * 60 + sec * 1;return second;}// 根据秒计算时分秒的字符串public static String getTimeHMSstr(Long second) {boolean fu = false;if (second < 0) {fu = true;second = 0 - second;}long hours = second / (60 * 60);long minus = (second - hours * 60 * 60) / 60;long secs = second - hours * 60 * 60 - minus * 60;String timeStr = "";if (hours < 10) {timeStr = timeStr + "0";}timeStr = timeStr + hours;timeStr = timeStr + ":";if (minus < 10) {timeStr = timeStr + "0";}timeStr = timeStr + minus;timeStr = timeStr + ":";if (secs < 10) {timeStr = timeStr + "0";;}timeStr = timeStr + secs;if (fu) {return "-" + timeStr;} else {return timeStr;}}public static String addDay(String dateStr, String format, int count) {SimpleDateFormat formatter = new SimpleDateFormat(format);ParsePosition pos = new ParsePosition(0);Date d = formatter.parse(dateStr, pos);Calendar calendar = Calendar.getInstance();calendar.setTime(d);calendar.add(Calendar.DATE, count);d = calendar.getTime();return formatter.format(d);}public static Date addOneDay(Date date, String format) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.add(Calendar.DATE, 1);date = calendar.getTime();return date;}public static Date addDay(Date date, int count) {Calendar calendar = Calendar.getInstance();if (date != null) {calendar.setTime(date);calendar.add(Calendar.DATE, count);date = calendar.getTime();return date;} else {return null;}}public static Date addMinute(Date date, int count) {Calendar calendar = Calendar.getInstance();if (date != null) {calendar.setTime(date);calendar.add(Calendar.MINUTE, count);date = calendar.getTime();return date;} else {return null;}}// 按照格式将字符串转化成日期public static Date stringToDate(String dateStr, String format) {SimpleDateFormat formatter = new SimpleDateFormat(format);ParsePosition pos = new ParsePosition(0);Date d = formatter.parse(dateStr, pos);return d;}// 按照格式将日期转化成字符串public static String dateToString(Date d, String format) {SimpleDateFormat formatter = new SimpleDateFormat(format);if (d == null) {return "";} else {return formatter.format(d);}}// 按照格式将字符串转化为字符串public static String stringToString(String temp, String format) {SimpleDateFormat formatter = new SimpleDateFormat(format);ParsePosition pos = new ParsePosition(0);Date d = formatter.parse(temp, pos);return dateToString(d, format);}// Date 转化成 Calendarpublic static Calendar dateToCalendar(Date date) {if (date == null) {return null;} else {Calendar cal = Calendar.getInstance();cal.setTime(date);return cal;}}// 按照格式将日期转化成字符串public static Date dateToDateByFormat(Date d, String format) {SimpleDateFormat formatter = new SimpleDateFormat(format);String dateStr = formatter.format(d);ParsePosition pos = new ParsePosition(0);Date date = formatter.parse(dateStr, pos);return date;}public static boolean beforeDay(Date dateCom, Date dateBase) {Calendar calendarCom = Calendar.getInstance();calendarCom.setTime(dateCom);Calendar calendarBase = Calendar.getInstance();calendarBase.setTime(dateBase);return calendarCom.before(calendarBase);}public static boolean afterDay(Date dateCom, Date dateBase) {Calendar calendarCom = Calendar.getInstance();calendarCom.setTime(dateCom);Calendar calendarBase = Calendar.getInstance();calendarBase.setTime(dateBase);return calendarCom.after(calendarBase);}public static Date addMonth(Date date, int count) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.add(Calendar.MONTH, count);Date result = calendar.getTime();return result;}public static Date addYear(Date date, int count) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.add(Calendar.YEAR, count);date = calendar.getTime();return date;}public static String addMonth(String dateStr, String format, int count) {SimpleDateFormat formatter = new SimpleDateFormat(format);ParsePosition pos = new ParsePosition(0);Date d = formatter.parse(dateStr, pos);Calendar calendar = Calendar.getInstance();calendar.setTime(d);calendar.add(Calendar.MONTH, count);d = calendar.getTime();return formatter.format(d);}// 获得某一日期的后一天public static Date getNextDate(Date date) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);int day = calendar.get(Calendar.DATE);calendar.set(Calendar.DATE, day + 1);return calendar.getTime();}// 获得某一日期的前一天public static Date getPreviousDate(Date date) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);int day = calendar.get(Calendar.DATE);calendar.set(Calendar.DATE, day - 1);return calendar.getTime();}// 获得某年某月第一天的日期public static Date getFirstDayOfMonth(int year, int month) {Calendar calendar = Calendar.getInstance();calendar.set(Calendar.YEAR, year);calendar.set(Calendar.MONTH, month - 1);calendar.set(Calendar.DATE, 1);return calendar.getTime();}public static Date getFirstDayOfMonth(Date thisDay) {Calendar calendar = Calendar.getInstance();calendar.setTime(thisDay);calendar.set(Calendar.DATE, 1);return calendar.getTime();}// 获得某年某月最后一天的日期public static Date getLastDayOfMonth(int year, int month) {Calendar calendar = Calendar.getInstance();calendar.set(Calendar.YEAR, year);calendar.set(Calendar.MONTH, month);calendar.set(Calendar.DATE, 1);return getPreviousDate(calendar.getTime());}public static Date getLastDayOfMonth(Date thisDay) {Calendar calendar = Calendar.getInstance();calendar.setTime(thisDay);int thisMonth = thisDay.getMonth();calendar.set(Calendar.MONTH, thisMonth + 1);calendar.set(Calendar.DATE, 1);return getPreviousDate(calendar.getTime());}// 获得当前日期上一个月的最后一天public static String getLastDayOfLastMonth() {Date thisDay = new Date();Calendar calendar = Calendar.getInstance();calendar.setTime(thisDay);calendar.set(Calendar.DAY_OF_MONTH, 1);calendar.add(Calendar.DAY_OF_MONTH, -1);return DateUtil.dateToString(calendar.getTime(), "yyyy-MM-dd");}// 获得当前日期上一个月的第一天public static String getFirstDayOfLastMonth() {Date thisDay = new Date();Calendar calendar = Calendar.getInstance();calendar.setTime(thisDay);calendar.add(Calendar.MONTH, -1);calendar.set(Calendar.DAY_OF_MONTH, 1);return DateUtil.dateToString(calendar.getTime(), "yyyy-MM-dd");}public static String getLastMonthOfDay() {StringBuffer sb = new StringBuffer();sb.append(getFirstDayOfLastMonth()).append("@");sb.append(getLastDayOfLastMonth());return sb.toString();}// 由年月日构建java.sql.Date类型public static Date buildDate(int year, int month, int date) {Calendar calendar = Calendar.getInstance();calendar.set(year, month - 1, date);return calendar.getTime();}// 取得某月的天数public static int getDayCountOfMonth(Date thisDay) {Calendar calendar = Calendar.getInstance();calendar.setTime(thisDay);calendar.set(Calendar.DATE, 0);return calendar.get(Calendar.DATE);}// 取得开始日期和结束日期之间的天数public static int getDayCountOfDate(Date startDate, Date endDate) {Calendar calendarStart = Calendar.getInstance();calendarStart.setTime(startDate);Calendar calendarEnd = Calendar.getInstance();calendarEnd.setTime(endDate);return calendarEnd.get(Calendar.DATE) - calendarStart.get(Calendar.DATE) + 1;}// 计算从一天到某一天的所有日期的LISTpublic static List<Date> getDateList(Date startDate, Date endDate) {List<Date> dateList = new ArrayList<Date>();if (startDate == null || endDate == null) {return dateList;}String dateFormat = "yyyy-MM-dd";long seconds = endDate.getTime() - startDate.getTime();long marginDays = seconds / (24 * 60 * 60 * 1000);dateList.add(startDate);for (int i = 0; i < marginDays; i++) {startDate = DateUtil.addOneDay(startDate, dateFormat);dateList.add(startDate);}return dateList;}// 获得某年某季度的最后一天的日期public static Date getLastDayOfQuarter(int year, int quarter) {int month = 0;if (quarter > 4) {return null;} else {month = quarter * 3;}return getLastDayOfMonth(year, month);}// 获得某年某季度的第一天的日期public static Date getFirstDayOfQuarter(int year, int quarter) {int month = 0;if (quarter > 4) {return null;} else {month = (quarter - 1) * 3 + 1;}return getFirstDayOfMonth(year, month);}// 获得某年的第一天的日期public static Date getFirstDayOfYear(int year) {return getFirstDayOfMonth(year, 1);}// 获得某年的最后一天的日期public static Date getLastDayOfYear(int year) {return getLastDayOfMonth(year, 12);}// 判断系统时间是否在开始时间和结束时间范围内public static boolean valiSysTimeInScope(Date startDate, Date sysTime, Date endDate) {if (endDate.getTime() > sysTime.getTime() && sysTime.getTime() > startDate.getTime()) {return true;} else {return false;}}// 计算两个任意时间中间的间隔天数public static int getIntervalDays(Date startday, Date endday) {if (startday.after(endday)) {Date cal = startday;startday = endday;endday = cal;}long sl = startday.getTime();long el = endday.getTime();long ei = el - sl;return (int) (ei / (1000 * 60 * 60 * 24));}// 获得某天周一的日期public static Date getMonday(String date) {Calendar cal = Calendar.getInstance();cal.setTime(DateUtil.stringToDate(date, "yyyy-MM-dd"));cal.add(Calendar.DAY_OF_MONTH, -1);cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);return cal.getTime();}public static Date getMonday(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(DateUtil.dateToDateByFormat(date, "yyyy-MM-dd"));cal.add(Calendar.DAY_OF_MONTH, -1);cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);return cal.getTime();}// 得到某天是星期几public static int getWeekDay(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(DateUtil.dateToDateByFormat(date, "yyyy-MM-dd"));cal.add(Calendar.DAY_OF_MONTH, -1);int x = cal.get(Calendar.DAY_OF_WEEK);return x;}// 获得某天周日的日期public static Date getSunday(String date) {Calendar cal = Calendar.getInstance();cal.setTime(DateUtil.stringToDate(date, "yyyy-MM-dd"));cal.add(Calendar.DAY_OF_MONTH, -1);cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);cal.add(Calendar.DAY_OF_MONTH, +6);return cal.getTime();}// 获得最小日期public static String getMinDate(String[] dates) {if (dates != null && dates.length != 0) {Date init = null;for (int i = 0; i < dates.length; i++) {Date date = DateUtil.stringToDate(dates[i], DateUtil.FORMAT_DAY);if (i == 0) {init = date;} else {if (init.after(date)) {init = date;}}}return DateUtil.dateToString(init, DateUtil.FORMAT_DAY);}return null;}// 获得最大日期public static String getMaxDate(String[] dates) {if (dates != null && dates.length != 0) {Date init = null;for (int i = 0; i < dates.length; i++) {Date date = DateUtil.stringToDate(dates[i], DateUtil.FORMAT_DAY);if (i == 0) {init = date;} else {if (init.before(date)) {init = date;}}}return DateUtil.dateToString(init, DateUtil.FORMAT_DAY);}return null;}public static Date getSunday(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(DateUtil.dateToDateByFormat(date, "yyyy-MM-dd"));cal.add(Calendar.DAY_OF_MONTH, -1);cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);cal.add(Calendar.DAY_OF_MONTH, +6);return cal.getTime();}// 将一个时间段按天划分，放入集合public static List<Date[]> getDates(Date startTime, Date endTime) {List<Date[]> list = new ArrayList<Date[]>();String dateFormat = "yyyy-MM-dd";Date startDate = DateUtil.dateToDateByFormat(startTime, dateFormat);Date endDate = DateUtil.dateToDateByFormat(endTime, dateFormat);if (DateUtil.beforeDay(startDate, endDate)) {long seconds = endDate.getTime() - startDate.getTime();long marginDays = seconds / (24 * 60 * 60 * 1000);for (long i = 0; i < marginDays + 1; i++) {Date[] temp = new Date[2];if (i == 0) {temp[0] = startTime;} else {temp[0] = startDate;}if (i == marginDays) {temp[1] = endTime;} else {startDate = DateUtil.addOneDay(startDate, "yyyy-MM-dd");temp[1] = startDate;}list.add(temp);}} else {Date[] onlyOne = new Date[2];onlyOne[0] = startTime;onlyOne[1] = endTime;list.add(onlyOne);}return list;}// 根据日期获得是周几public static int getDateDayOfWeek(Date date) {int count = 0;Calendar cal = Calendar.getInstance();cal.setTime(date);int day = cal.get(Calendar.DAY_OF_WEEK);count = day - 1;if (count == 0) {count = 7;}return count;}// 根据日期获得"星期几"public static String getWeek(Date date) {String week = "";switch (DateUtil.getDateDayOfWeek(date)) {case 0:week = "星期日";break;case 1:week = "星期一";break;case 2:week = "星期二";break;case 3:week = "星期三";break;case 4:week = "星期四";break;case 5:week = "星期五";break;case 6:week = "星期六";break;default:break;}return week;}//由日期和时间拼成DATE类型的数据public static Date spliceDate(Date date, Date time) {return DateUtil.createDateTime(DateUtil.getDateStr(date) + " " + DateUtil.getTimeStr(time));}/*** @param startDay 需要比较的时间 不能为空(null),需要正确的日期格式 ,如：2009-09-12* @param endDay 被比较的时间* @param stype 返回值类型 0为多少天，1为多少个月，2为多少年* @return 举例：* compareDate("2009-09-12", null, 0);//比较天* compareDate("2009-09-12", null, 1);//比较月* compareDate("2009-09-12", null, 2);//比较年*/public static int compareDate(Date startDay, Date endDay, int stype) {int n = 0;Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();Date start = null;Date end = null;if (stype == 1) {start = DateUtil.dateToDateByFormat(startDay, "yyyy-MM");end = DateUtil.dateToDateByFormat(endDay, "yyyy-MM");} else {start = DateUtil.dateToDateByFormat(startDay, "yyyy-MM-dd");end = DateUtil.dateToDateByFormat(endDay, "yyyy-MM-dd");}try {c1.setTime(start);c2.setTime(end);} catch (Exception e3) {e3.printStackTrace();}//List list = new ArrayList();while (!c1.after(c2)) { // 循环对比，直到相等，n 就是所要的结果//list.add(df.format(c1.getTime())); // 这里可以把间隔的日期存到数组中 打印出来n++;if (stype == 1) {c1.add(Calendar.MONTH, 1); // 比较月份，月份+1} else {c1.add(Calendar.DATE, 1); // 比较天数，日期+1}}n = n - 1;if (stype == 2) {n = n / 365;}return n;}//获取上周周一日期public static Date geLastWeekMonday(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(getThisWeekMonday(date));cal.add(Calendar.DATE, -7);return cal.getTime();}//获取本周周一日期public static Date getThisWeekMonday(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(date);// 获得当前日期是一个星期的第几天int dayWeek = cal.get(Calendar.DAY_OF_WEEK);if (1 == dayWeek) {cal.add(Calendar.DAY_OF_MONTH, -1);}// 设置一个星期的第一天，按中国的习惯一个星期的第一天是星期一cal.setFirstDayOfWeek(Calendar.MONDAY);// 获得当前日期是一个星期的第几天int day = cal.get(Calendar.DAY_OF_WEEK);// 根据日历的规则，给当前日期减去星期几与一个星期第一天的差值cal.add(Calendar.DATE, cal.getFirstDayOfWeek() - day);return cal.getTime();}//获取下周周一日期public static Date getNextWeekMonday(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(getThisWeekMonday(date));cal.add(Calendar.DATE, 7);return cal.getTime();}//获得某天下周日的日期public static Date getNextWeekSunday(Date date) {Calendar cal = Calendar.getInstance();cal.setTime(getSunday(date));cal.add(Calendar.DATE, 7);return cal.getTime();}// 几个简便方法public static Date createTime(String time) {return DateUtil.stringToDate(time, DateUtil.FORMAT_TIME);}public static Date createDateTime(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_DAYTIME);}public static Date createYearTime(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_YYYY_MM);}public static Date createDateMon(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_DAY_SLASH);}public static Date createDateFormat(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT);}public static Date createDateMin(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_DAY_HOUR_MIN);}public static Date createDateYearMon(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_YYYYMM);}public static Date createDateYear(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_YYYY);}public static Date createDateDay(String dateTime) {return DateUtil.stringToDate(dateTime, DateUtil.FORMAT_YYYYMMDD);}public static Date createDate(String date) {return DateUtil.stringToDate(date, DateUtil.FORMAT_DAY);}public static String getTimeStr(Date time) {return DateUtil.dateToString(time, DateUtil.FORMAT_TIME);}public static String getTimeShortStr(Date time) {return DateUtil.dateToString(time, DateUtil.FORMAT_TIME_SHORT);}public static String getDateStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAY);}public static String getDateTimeYearMonStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_YYYYMM);}public static String getDateTimeFormatStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT);}public static String getDateTimeMinStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAY_HOUR_MIN);}public static String getDateTimeStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAYTIME);}public static String getDateYearTimeStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_YYYY_MM);}public static String getDateMonStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAY_SLASH);}public static String getDateYearStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_YYYY);}public static String getDateDayStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_YYYYMMDD);}public static String getDateCNStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAY_CN);}public static String getDateCNHMStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAY_CN_HM);}//只显示月和日public static String getDateCNMDStr(Date date) {return DateUtil.dateToString(date, DateUtil.FORMAT_DAY_CN_MD);}//只显示月public static String getDateCNMMStr(Date date) { return DateUtil.dateToString(date, DateUtil.FORMAT_DAY_CN_MM); }/*** 当前时间属于上旬中旬还是下旬*/public static String getDateEarly(Date date) {String Str;int c ;//获得当前时间当月的第一天Date beginDate = getFirstDayOfMonth(date);//计算第一天时间到传入时间的及那个天数c = DateUtil.getIntervalDays(beginDate, date);Str = getDateCNMMStr(date);if(c>=20){ Str = Str+"下旬";}else if(c>=10 && c<20){ Str = Str+"中旬";}else if(c>=0 && c<10){ Str = Str+"上旬"; }return Str;}// 获得当前日期的上一个月public static Date getLastMonthDate() {Calendar calendar = Calendar.getInstance();calendar.setTime(new Date());calendar.add(Calendar.MONTH, -1);return calendar.getTime();}/*** 获取参数时间比当前时间的差值* @param date 参数时间* @param now 当前数据库时间* @return*/public static String getPrettyDate(Date date,Date now) {try {long diff;double day_diff;diff = ((now.getTime() - date.getTime()) / 1000);day_diff = Math.floor(diff / 86400);if (day_diff < 0) {return "";}if (diff < 60) {return "现在";} else if (diff < 120) {return "1 分钟前";} else if (diff < 3600) {return (int)Math.floor(diff / 60) + " 分钟前";} else if (diff < 7200) {return "1 小时前";} else if (diff < 86400) {return (int)Math.floor(diff / 3600) + " 小时前";} else if (day_diff == 1) {return "昨天";} else if (day_diff < 7) {return (int)day_diff + " 天前";} else if (day_diff < 31) {return (int)Math.ceil(day_diff / 7) + " 星期前";} else if (day_diff >= 31) {return "几个月前";} else {return "";}}catch (Exception e){e.printStackTrace();return "";}}
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