DateUtil时间转换工具类

2024-05-06 21:38
文章标签 工具 时间 转换 dateutil

本文主要是介绍DateUtil时间转换工具类，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

时间格式化工具DateUtil


package com.weidai.bwcrm.util;import com.weidai.common.support.lang.util.AssertUtil;import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;/*** @Title: DateUtil.java* @Description: 日期辅助类* @version V1.0*/
public class DateUtil {/*** 返回当前时间 格式：yyyy-MM-dd hh:mm:ss* * @return String*/public static String fromDateH() {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return format1.format(new Date());}public static String fromDateH2() {DateFormat format1 = new SimpleDateFormat("yyyyMMddHHmmss");return format1.format(new Date());}public static String fromCurrentDate() {DateFormat format1 = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");return format1.format(new Date());}public static String getCurrentMillisecond() {SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");return sdf.format(new Date());}public static String toDateTimeString(Date date) {if(date == null) {return null;} else {SimpleDateFormat sdff = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String dateStr = sdff.format(date);return dateStr;}}/*** 返回当前时间 格式：yyyy-MM-dd* * @return String*/public static String fromDateY() {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");return format1.format(new Date());}/*** 返回当前时间 格式：yyyyMMdd* * @return String*/public static String fromDateY2() {DateFormat format1 = new SimpleDateFormat("yyyyMMdd");return format1.format(new Date());}/*** @Title: getDateString* @Description: 使用"yyyy-MM-dd HH:mm:ss"格式化日期* @param date* @return String 返回类型*/public static String getDateStringH(Date date) {return getDateString(date, "yyyy-MM-dd HH:mm");}public static String getDateStringH2(Date date) {return getDateString(date, "yyyy/MM/dd HH:mm:ss");}/*** @Title: getDateString* @Description: 使用"yyyy-MM-dd HH:mm:ss"格式化日期* @param date* @return String 返回类型*/public static String getDateStringY(Date date) {return getDateString(date, "yyyy-MM-dd");}/*** @Title: getDateString* @Description: 格式化日期* @param date 日期* @param format 模式* @return String 返回类型*/public static String getDateString(Date date, String format) {if (date != null) {SimpleDateFormat formatter = new SimpleDateFormat(format);String dateString = formatter.format(date);return dateString;}return null;}/*** 功能描述：String 转 timestamp* * @param time* @return* @author 胡佳[hujia@xinnet.com]* @since 2013-11-28* @update:[变更日期YYYY-MM-DD][更改人姓名][变更描述]*/public static Timestamp getTimestamp(String time) {return Timestamp.valueOf(time);}/*** 功能描述：date 转 timestamp* * @param date* @return* @author 胡佳[hujia@xinnet.com]* @since 2013-11-28* @update:[变更日期YYYY-MM-DD][更改人姓名][变更描述]*/public static Timestamp getTimestamp(Date date) {return new Timestamp(date.getTime());}/*** 返回系统当前时间(精确到毫秒),作为一个唯一的订单编号* * @return 以yyyyMMddHHmmss为格式的当前系统时间*/public static String getOrderNum() {Date date = new Date();DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");Random random = new Random();String rand = String.valueOf(random.nextInt(100000));for (int j = 0; j < 5 - rand.length(); j++) {rand += "0";}return df.format(date) + rand;}/*** @return 以yyyyMMddHHmmss为格式的当前系统时间*/public static String getYyyyMMddHHmmss() {Date date = new Date();DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");return df.format(date);}/*** 格式化字符串* * @param date* @return*/public static String getFormatDate(Timestamp timestamp) {Date date = new Date(timestamp.getTime());String pattern = "yyyy-MM-dd";return getFormatDate(pattern, date);}public static String getFormatDateTime(Timestamp timestamp) {Date date = new Date(timestamp.getTime());String pattern = "yyyy-MM-dd HH:mm:ss";return getFormatDate(pattern, date);}public static String getFormatDate(String pattern, Date date) {SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);return simpleDateFormat.format(date);}public static String getFormatDate(String date) {AssertUtil.notEmpty(date, "日期date");return date.substring(0, 10);}/*** 根据指定格式得到当前日期的字符串* * @param pattern String* @return String*/public static String getCurrentDate(String pattern) {if (pattern == null || pattern.trim().equals("")) {pattern = "yyyy-MM-dd HH:mm:ss";}pattern = pattern.trim();SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);return simpleDateFormat.format(new Date());}/*** 以默认格式得到当前日期的字符串* * @return String*/public static String getCurrentDate() {return getCurrentDate("yyyy-MM-dd");}/*** 滚动日期* * @param timestamp 被滚动的日期* @param calendarField 日历字段* @param rollAmount 滚动量* @return Timestamp*/public static Timestamp getRollTime(Timestamp timestamp, int calendarField, int rollAmount) {AssertUtil.notNull(timestamp, "日期");Calendar cal = Calendar.getInstance();cal.setTime(new Date(timestamp.getTime()));cal.add(calendarField, rollAmount);return new Timestamp(cal.getTimeInMillis());}/*** 年滚动* * @param timestamp Timestamp* @param rollAmount 滚动量* @return Timestamp*/public static Timestamp getRollYear(Timestamp timestamp, int rollAmount) {return getRollTime(timestamp, Calendar.YEAR, rollAmount);}/*** 月滚动* * @param timestamp Timestamp* @param rollAmount 滚动量* @return Timestamp*/public static Timestamp getRollMonth(Timestamp timestamp, int rollAmount) {return getRollTime(timestamp, Calendar.MONTH, rollAmount);}/*** 天滚动* * @param timestamp Timestamp* @param rollAmount 滚动量* @return Timestamp*/public static Timestamp getRollDay(Timestamp timestamp, int rollAmount) {return getRollTime(timestamp, Calendar.DAY_OF_WEEK, rollAmount);}/*** 计算两个日期之间的相隔多少天(时间部分忽略)* @param one 如：2016-06-30* @param two 如：2016-06-29  返回结果1* @return 返回正数说明，one比two多少天。返回负数说明one比two少多少天。返回0说明是同一天（但不一定是同一个时刻）*/public static int getIntervalDays(Date one, Date two) {one = getDateYYYYMMdd2(getDateStringY(one));two = getDateYYYYMMdd2(getDateStringY(two));long t1 = one.getTime();long t2 = two.getTime();return (int) ((t1 - t2)  / 1000 / 60 / 60 / 24);}/*** 两个日期相差的天数* * @param bigTime 大日期* @param littleTime 小日期* @return int 相差的天数*/public static int getIntervalDays(Timestamp bigTime, Timestamp littleTime) {AssertUtil.notNull(bigTime, "日期");AssertUtil.notNull(littleTime, "日期");String t1str = DateUtil.getTimestampStr(bigTime);String t2str = DateUtil.getTimestampStr(littleTime);Timestamp t1 = DateUtil.getTimestampFormat(t1str);Timestamp t2 = DateUtil.getTimestampFormat(t2str);// Calendar bigCal = Calendar.getInstance();// bigCal.setTimeInMillis(bigTime.getTime());// bigCal.set(Calendar.HOUR, 0);// bigCal.set(Calendar.MINUTE, 0);// bigCal.set(Calendar.SECOND, 0);// bigTime.setTime(bigCal.getTimeInMillis());//// Calendar littleCal = Calendar.getInstance();// littleCal.setTimeInMillis(littleTime.getTime());// littleCal.set(Calendar.HOUR, 0);// littleCal.set(Calendar.MINUTE, 0);// littleCal.set(Calendar.SECOND, 0);// littleTime.setTime(littleCal.getTimeInMillis());//// System.out.println("bigTime=" + getTimestampStr(bigTime));// System.out.println("littleTime=" + getTimestampStr(littleTime));long intervalTime = t1.getTime() - t2.getTime();int intervalDay = (int) (intervalTime / 1000 / 60 / 60 / 24);return intervalDay;}/*** 两个日期相差的月数(退费的情况)* * @param bigTime 大日期* @param littleTime 小日期* @return int 相差的月数*/public static int getIntervalRefundMonths(Timestamp bigTime, Timestamp littleTime) {return getIntervalChargeMonths(bigTime, littleTime);}/*** 两个日期相差的月数(收费的情况)* * @param bigTime 大日期* @param littleTime 小日期* @return int 相差的月数*/public static int getIntervalChargeMonths(Date bigTime, Date littleTime) {AssertUtil.notNull(bigTime, "日期");AssertUtil.notNull(littleTime, "日期");Calendar bigCalendar = Calendar.getInstance();bigCalendar.setTime(new Date(bigTime.getTime()));Calendar littleCalendar = Calendar.getInstance();littleCalendar.setTime(new Date(littleTime.getTime()));int intervalYear = getIntervalYears(bigTime, littleTime);int intervalMonth = bigCalendar.get(Calendar.MONTH) - littleCalendar.get(Calendar.MONTH);int n = intervalYear * 12 + intervalMonth;n = n < 0 ? 0 : n;return n;}/*** 两个日期相差的年数* * @param bigTime Timestamp* @param littleTime Timestamp* @return int*/public static int getIntervalYears(Date bigTime, Date littleTime) {AssertUtil.notNull(bigTime, "日期");AssertUtil.notNull(littleTime, "日期");Calendar bigCalendar = Calendar.getInstance();bigCalendar.setTime(new Date(bigTime.getTime()));Calendar littleCalendar = Calendar.getInstance();littleCalendar.setTime(new Date(littleTime.getTime()));return bigCalendar.get(Calendar.YEAR) - littleCalendar.get(Calendar.YEAR);}/*** 得到日期字符串* * @param timestamp Timestamp* @return String*/public static String getTimestampStr(Timestamp timestamp) {AssertUtil.notNull(timestamp, "日期");String pattern = "yyyy-MM-dd";SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);return simpleDateFormat.format(new Date(timestamp.getTime()));}/*** 日期比较,t1>t2则返回true* * @param t1* @param t2* @return t1>t2则返回true*/public static boolean compareDate(Timestamp t1, Timestamp t2) {String d1 = DateUtil.getFormatDate(t1);String d2 = DateUtil.getFormatDate(t2);return d1.compareTo(d2) > 0;}/*** 日期时间比较,t1>t2则返回true* * @param t1* @param t2* @return t1>t2则返回true*/public static boolean compareDateTime(Timestamp t1, Timestamp t2) {String d1 = DateUtil.getFormatDateTime(t1);String d2 = DateUtil.getFormatDateTime(t2);return d1.compareTo(d2) > 0;}/*** 日期时间比较,d1>d2则返回true* * @param d1* @param d2* @return d1>d2则返回true*/public static boolean compareDate(Date d1, Date d2) {Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();c1.setTime(d1);c2.setTime(d2);return c1.compareTo(c2) > 0;}/*** 日期时间比较,d1>d2则返回1;d1=d2返回0;d1<d2返回-1* * @param d1* @param d2* @return d1>d2则返回true*/public static int newCompareDate(Date d1, Date d2) {if (d1 == null) {if (d2 == null) {return 0;} else {return -1;}} else {if (d2 == null) {return 1;} else {return 0 - d1.compareTo(d2);}}}/*** 日期时间比较,d1>=d2则返回true* * @param d1* @param d2* @return d1>=d2则返回true*/public static boolean compareDateEqual(Date d1, Date d2) {Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();c1.setTime(d1);c2.setTime(d2);return c1.compareTo(c2) >= 0;}public static Timestamp getTimestampFormat(String dateStr) {String year = dateStr.substring(0, 4);String month = dateStr.substring(5, 7);if (month.startsWith("0")) {month = month.substring(1);}String day = dateStr.substring(8, 10);if (day.startsWith("0")) {day = day.substring(1);}Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, Integer.parseInt(year));cal.set(Calendar.MONTH, Integer.parseInt(month) - 1);cal.set(Calendar.DAY_OF_MONTH, Integer.parseInt(day));cal.set(Calendar.HOUR_OF_DAY, 0);cal.set(Calendar.MINUTE, 0);cal.set(Calendar.SECOND, 0);return new Timestamp(cal.getTimeInMillis());}/*** 日期比较,t1==t2则返回true* * @param t1* @param t2* @return*/public static boolean equalDate(Timestamp t1, Timestamp t2) {String d1 = DateUtil.getFormatDate(t1);String d2 = DateUtil.getFormatDate(t2);return d1.equals(d2);}/*** 得到日期字符串 1900-01-01 00:00:00* * @param timestamp Timestamp* @param String pattern 例如 yyyy-MM-dd kk:mm:ss* @return String*/public static String getFormatedTimestampStr(Timestamp timestamp, String pattern) {AssertUtil.notNull(timestamp, "日期不能为空");if (pattern == null || "".equals(pattern)) {pattern = "yyyy-MM-dd kk:mm";}SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);return simpleDateFormat.format(new Date(timestamp.getTime()));}/*** @author gonghailiang add by gonghailiang 2010-6-5 增加流量 返回某一个月份最后一天* @param year 年* @param month 月 @ return Timestamp 增加流量 返回某一个月份最后一天;*/public static Timestamp getMonthLastDay(String year, String month) {Calendar cal = Calendar.getInstance();// 年cal.set(Calendar.YEAR, Integer.parseInt(year));// 月，因为Calendar里的月是从0开始，所以要-1cal.set(Calendar.MONTH, Integer.parseInt(month) - 1);// 日，设为一号cal.set(Calendar.DATE, 1);// 月份加一，得到下个月的一号cal.add(Calendar.MONTH, 1);// 下一个月减一为本月最后一天cal.add(Calendar.DATE, -1);// System.out.println(String.valueOf(cal.get(Calendar.DAY_OF_MONTH)));//);return Timestamp.valueOf(year + "-" + month + "-" + String.valueOf(cal.get(Calendar.DAY_OF_MONTH))+ " 23:59:59");}private static final SimpleDateFormat df  = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");private static final SimpleDateFormat df2 = new SimpleDateFormat("yyyy-MM-dd");public static Date parseDate(String str) {try {return df.parse(str);} catch (ParseException e) {e.printStackTrace();throw new RuntimeException(e);}}public static Date parseDateyyyyMMdd(String str) {try {return df2.parse(str);} catch (ParseException e) {e.printStackTrace();throw new RuntimeException(e);}}public static String formatDate(Date d) {return d == null ? null : df.format(d);}public static String formatDate(Object d) {return df.format(d);}public static String formatDate2(Object d) {return df2.format(d);}/*** 增加某一日期后的几天，days参数可为负数* * @param date* @param days* @return*/public static Date addDay(Date date, int days) {Calendar c = Calendar.getInstance();c.setTime(date);c.add(Calendar.DAY_OF_YEAR, days);return c.getTime();}/*** 增加某一日期后的几天，days参数可为负数** @param date* @param days* @return*/public static Date addHour(Date date, int hours) {Calendar ca = Calendar.getInstance();ca.setTime(date);ca.add(Calendar.HOUR_OF_DAY, hours);return ca.getTime();}/*** 获取日期的月份* * @param date* @return*/public static int getMonth(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);return c.get(Calendar.MONTH);}/*** 获取日期的天* * @param date* @return*/public static int getDay(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);return c.get(Calendar.DATE);}/*** 获取日期的年份* * @param date* @return*/public static int getYear(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);return c.get(Calendar.YEAR);}/*** add by liyingpeng 2013-12-31* * @param t1 开始时间* @param t2 结束时间 @ return String 返回结束时间和开始时间的相差秒数*/public static String getIntervalSecond(Date t1, Date t2) {long d = (t2.getTime() - t1.getTime());return d + "";}/*** add by liyingpeng 2013-12-31* * @param t1 开始时间* @param t2 结束时间 @ return String 返回结束时间和开始时间的相差秒数*/public static long getIntervalTime(Date t1, Date t2) {long d = t2.getTime() - t1.getTime();return d;}/*** 获取下一天 默认 格式 yyyy-MM-dd 00:00:00* * @param date* @return*/public static Date getNextDayYYYYMMdd(Date date) {date = rollDay(date, 1);return getDateYYYYMMdd(dateStr2(date));}public static Date getNextDayYYYYMMddByDay(Date date, int day) {date = rollDay(date, day);return getDateYYYYMMdd(dateStr2(date));}public static Date getNextDayYYYYMMddByMonth(Date date, int mon) {date = rollMon(date, mon);return getDateYYYYMMdd(dateStr2(date));}public static Date getNextDayYYYYMMddHHMMSSByMonth(Date date, int mon) {date = rollMon(date, mon);return getDateYYYYMMddHHMMSS(dateStr3(date));}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();}public static String dateStryyyyMMdd(Date date) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");String str = format.format(date);return str;}public static String dateStr2(Date date) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String str = format.format(date);return str;}public static String dateStr3(Date date) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String str = format.format(date);return str;}public static Date getDateYYYYMMdd(String str) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date date = null;try {date = format.parse(str);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}return date;}public static Date getDateYYYYMMdd2(String str) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");Date date = null;try {date = format.parse(str);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}return date;}/*** 字符串yyyy/MM/dd HH:mm:ss格式时间转date* * @param str* @return*/public static Date getDateYMD(String str) {SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");Date date = null;try {date = format.parse(str);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}return date;}public static Date rollMon(Date d, int mon) {Calendar cal = Calendar.getInstance();cal.setTime(d);cal.add(Calendar.MONTH, mon);return cal.getTime();}public static Date getDateYYYYMMddHHMMSS(String str) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date date = null;try {date = format.parse(str);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}return date;}/*** add by luozf* * @param one 开始时间* @param two 结束时间 @ return String 返回结束时间和开始时间的 天 /小时/分/秒*/public static String getDistanceTime(Date one, Date two) throws ParseException {long day = 0;long hour = 0;long min = 0;long sec = 0;long time1 = one.getTime();long time2 = two.getTime();long diff;if (time1 < time2) {diff = time2 - time1;} else {diff = time1 - time2;}day = diff / (24 * 60 * 60 * 1000);hour = (diff / (60 * 60 * 1000) - day * 24);min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);return day + "天" + hour + "小时" + min + "分" + sec + "秒";}/*** add by lidong* * @param date* @return 当前星期一*/public static String getMonday(Date date) {Calendar cal = Calendar.getInstance();// 获取当前日期cal.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本周第一天return getDateStringY(cal.getTime());}/*** add by lidong* * @param date* @return 当月第一天*/public static String getEarlierMonth(Date date) {Calendar cal = Calendar.getInstance();// 获取当前日期cal.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天return getDateStringY(cal.getTime());}/*** add by lidong* * @param date* @return 当月第一天*/public static String getEndMonth(Date date) {// 获取CalendarCalendar calendar = Calendar.getInstance();// 设置时间,当前时间不用设置// calendar.setTime(new Date());// 设置日期为本月最大日期calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DATE));DateFormat format = new SimpleDateFormat("yyyy-MM-dd");return format.format(calendar.getTime());}/*** add by lidong* * @param date* @return 当年第一天*/public static String getYearOne(Date date) {Calendar cal = Calendar.getInstance();// 获取当前日期cal.set(Calendar.DAY_OF_YEAR, 1);// //本年第一天return getDateStringY(cal.getTime());}/*** 返回格式为(yyyy-MM-dd HH:mm:ss)，秒为0的时间* * @param date* @return*/public static Date getZeroSecondDate(Date date) {String str = getDateStringH(date);str = str.substring(0, str.length() - 3) + ":00";return parseDate(str);}/*** 返回格式为(yyyy-MM-dd HH:mm:ss)，秒为0的时间* * @param date* @return*/public static Date getZeroSecondDate(String str) {return getZeroSecondDate(parseDate(str));}/*** 测试方法* * @param args String[]*/// public static void main(String[] args) {// System.out.println(getMonthLastDay(new Date()));// System.out.println(getEndMonth(new Date()));// System.out.println(getEarlierMonth(new Date()));// System.out.println(getMonthLastDay(parseDate("2015-01-26 00:12:56")));// System.out.println(getMonthLastDay(parseDate("2015-02-05 03:54:48")));// System.out.println(getMonthLastDay(parseDate("2015-04-15 12:19:36")));// System.out.println(getMonthLastDay(parseDate("2015-07-15 19:44:32")));// Date date = parseDate("2015-01-26 00:12:56");// System.out.println(DateUtil.getMonthLastDay(date).equals(date));// date = parseDate("2015-02-28 15:29:33");// System.out.println(DateUtil.getMonthLastDay(date).equals(date));// System.out.println(getTitel(new Date(), "【双十一】"));// System.out.println(getIntervalChargeMonths(parseDate("2015-09-30 00:12:56"),// new Date()));// System.out.println(getEarlierMonth(new Date()));// Calendar cal = Calendar.getInstance();// 获取当前日期// cal.add(Calendar.MONTH, -1);// System.out.println(getDateStringY(cal.getTime()));// Calendar cal2 = Calendar.getInstance();// 获取当前日期// cal2.set(Calendar.DAY_OF_MONTH, 1);// System.out.println(getDateStringY(cal2.getTime()));// Timestamp t1 = new Timestamp(System.currentTimeMillis());// //// String dateStr = "2012-01-28 15:24:24";// Timestamp t2 = DateUtil.getTimestamp(dateStr);// //// // System.out.println(DateUtil.getIntervalDays(t1, t2));//// Timestamp currentTime = new// Timestamp(Calendar.getInstance().getTimeInMillis());// System.out.println(DateUtil.getTimestampStr(currentTime));// System.out.println(DateUtil.getTimestampStr(t1));//// System.out.println(Calendar.getInstance().getTimeInMillis());// System.out.println(System.currentTimeMillis());// System.out.println(getIntervalSecond(new Date(),// DateUtil.parseDate("2015-05-11 17:43:00")));// System.out.println("===========" + 2 * 60 * 60 * 1000);// System.out.println("===========" + 7211 / 60 / 60);// Date now = new Date();// System.out.println(getDateStringH(now));// System.out.println(getDateStringH(rollDay(now, 500)));// System.out.println(getDateStringH(addDay(now, 500)));// System.out.println(getDateStringH(now));// }public static String fromNowStartTime() {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");return format1.format(new Date()) + " 00:00:00";}public static String fromNowEndTime() {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");return format1.format(new Date()) + " 23:59:59";}/*** 获取传入时间天的截止时间点* * @param d* @return*/public static Date formEndTime(Date d) {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");return getDateYYYYMMddHHMMSS(format1.format(d) + " 23:59:59");}/*** 获取传入时间天的开始时间点* * @param d* @return*/public static Date formStartTime(Date d) {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");return getDateYYYYMMddHHMMSS(format1.format(d) + " 00:00:00");}/*** 获取传入时间月份最后一天* * @param date* @return*/public static Date getMonthLastDay(Date date) {Calendar ca = Calendar.getInstance();ca.setTime(date);ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));return ca.getTime();}/*** 获取传入时间月份的第一天* * @param date* @return*/public static Date getMonthFirstDay(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);c.add(Calendar.MONTH, 0);c.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天return c.getTime();}/*** 计算两个日期之间相差的天数* * @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) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");try {smdate = sdf.parse(sdf.format(smdate));bdate = sdf.parse(sdf.format(bdate));} catch (ParseException e) {return 0;}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));}/*** 获取本月最后一天* * @param sDate* @return*/public static int getLastDayOfMonth(Date sDate) {Calendar cDay = Calendar.getInstance();cDay.setTime(sDate);int lastDay = cDay.getActualMaximum(Calendar.DAY_OF_MONTH);return lastDay;}/*** @param date* @param titel* @return 返回双十一标志*/public static String getTitel(Date date, String titel) {if (date != null && titel != null) {DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");if ("2015-11-11".equals(format1.format(date)) && titel.indexOf("【双十一】") < 0) {return "【双十一】" + titel;}}return titel;}/*** 日期月份的改变* * @param d* @param i* @return*/public static String DateMonthChange(Date d, int i) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Calendar rightNow = Calendar.getInstance();rightNow.setTime(d);rightNow.add(Calendar.MONTH, i);Date dt1 = rightNow.getTime();String reStr = sdf.format(dt1);return reStr;}/*** 日期加一天* * @param d* @param i* @return* @throws Exception*/public static String DateDayChange(String date) throws Exception {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date dt = sdf.parse(date);Calendar rightNow = Calendar.getInstance();rightNow.setTime(dt);rightNow.add(Calendar.DAY_OF_YEAR, 1);// 日期加1天Date dt1 = rightNow.getTime();String reStr = sdf.format(dt1);return reStr;}public static long dateDiff(String startTime, String endTime, String format) throws Exception {// 按照传入的格式生成一个simpledateformate对象SimpleDateFormat sd = new SimpleDateFormat(format);long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数long nh = 1000 * 60 * 60;// 一小时的毫秒数long nm = 1000 * 60;// 一分钟的毫秒数long ns = 1000;// 一秒钟的毫秒数long diff;try {// 获得两个时间的毫秒时间差异long diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();long day = diff / nd;// 计算差多少天long hour = diff % nd / nh;// 计算差多少小时long min = diff % nd % nh / nm;// 计算差多少分钟long sec = diff % nd % nh % nm / ns;// 计算差多少秒//输出结果System.out.println("时间相差：" + day + "天" + hour + "小时" + min + "分钟" + sec + "秒。");return day * 24 * 60 + hour * 60 + min;}/*** @Description: 返回周几* @param pTime* @return* @throws Exception* @return int* @author zhangbaoxin* @date 2016年5月3日 下午5:41:06*/public static int dayForWeek() {Calendar c = Calendar.getInstance();int dayForWeek = 0;if (c.get(Calendar.DAY_OF_WEEK) == 1) {dayForWeek = 7;} else {dayForWeek = c.get(Calendar.DAY_OF_WEEK) - 1;}return dayForWeek;}public static Date getStartMonth(int year, int month) {Calendar calendar = Calendar.getInstance();calendar.set(year, month - 1, 1);return getStartDate(calendar.getTime());}public static Date getEndMonth(int year, int month) {Calendar calendar = Calendar.getInstance();calendar.set(year, month - 1, 1);calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));return getEndDate(calendar.getTime());}public static Date getStartDate(Date date) {if(date == null) {return null;} else {Calendar cal = Calendar.getInstance();cal.setTime(date);cal.set(11, 0);cal.set(12, 0);cal.set(13, 0);cal.set(14, 0);return cal.getTime();}}public static Date getEndDate(Date date) {if(date == null) {return null;} else {Calendar cal = Calendar.getInstance();cal.setTime(date);cal.set(11, 23);cal.set(12, 59);cal.set(13, 59);cal.set(14, 999);return cal.getTime();}}public static void main(String[] args) {Calendar calendar = Calendar.getInstance();calendar.add(Calendar.MONTH, -1);calendar.set(Calendar.DAY_OF_MONTH, 1);calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);Date startDate = calendar.getTime();System.out.println(getDateStringH(startDate));System.out.println(getStartMonth(2016,1));System.out.println(getEndMonth(2016,1));System.out.println(getStartMonth(2016,9));System.out.println(getEndMonth(2016,9));}
}


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