/*** <li>说明: 日期时间工具类,针对日期的一些常用的处理方法。* <li>创建日期:2022-05-04* @author lyy*/
public final class DateUtils {/** 日期格式“年月日”,yyyyMMdd(如20121231) */public static final SimpleDateFormat yyyyMMdd = new SimpleDateFormat("yyyyMMdd");/** 日期格式“年-月-日”,yyyy-MM-dd(如2012-12-31) */public static final SimpleDateFormat yyyy_MM_dd = new SimpleDateFormat("yyyy-MM-dd");/** 默认日期格式“年-月-日” */public static final SimpleDateFormat DEFAULT_FORMAT = yyyy_MM_dd;/** 日期格式“年-月-日 时:分:秒”,yyyy-MM-dd HH:mm:ss(如2012-12-31 20:31:18) */public static final SimpleDateFormat yyyy_MM_dd_HH_mm_ss = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");/** 日期格式“年-月-日 时:分:秒:毫秒”,yyyy-MM-dd HH:mm:ss(如2012-12-31 20:31:18) */public static final SimpleDateFormat yyyy_MM_dd_HH_mm_ss_SSS = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS"); /** 日期格式“年-月-日 时:分”,yyyy-MM-dd HH:mm(如2012-12-31 20:31) */public static final SimpleDateFormat yyyy_MM_dd_HH_mm = new SimpleDateFormat("yyyy-MM-dd HH:mm");/** 日期格式“年月日时分秒”,yyyyMMddHHmmss(如20121231203118) */public static final SimpleDateFormat yyyyMMddHHmmss = new SimpleDateFormat("yyyyMMddHHmmss"); /** 日期格式“年月日时分秒毫秒”,yyyyMMddHHmmssSSS(如20121231203118978) */public static final SimpleDateFormat yyyyMMddHHmmssSSS = new SimpleDateFormat("yyyyMMddHHmmssSSS");/** 日期格式“年月日时分秒毫秒”,yyyy-MM-ddHH:mm:ssSSS(如2012-12-3120:31:18523) */public static final SimpleDateFormat yyyy_MM_ddHH_mm_ssSSS = new SimpleDateFormat("yyyy-MM-ddHH:mm:ssSSS");/** 日期格式“月日”,MMdd(如0121) */public static final SimpleDateFormat MMdd = new SimpleDateFormat("MMdd");/*** <li>说明:禁止实例化该类*/private DateUtils() {}/*** <li>说明:使用默认日期格式(yyyy-MM-dd)解析日期字符串* @param String date:日期字符串* @return Date 解析成功返回的日期对象* @throws ParseException*/public static Date parse(String date) throws ParseException{return DEFAULT_FORMAT.parse(date);}/*** <li>说明:使用指定日期格式解析日期字符串* @param String date:日期字符串* @param String format:日期格式* @return Date 解析成功返回的日期对象* @throws ParseException*/public static Date parse(String date, String format) throws ParseException{return new SimpleDateFormat(format).parse(date);} /*** <li>说明:根据格式化字符串,返回当前系统时间的字符串* @param String format:日期时间格式化字符串* @return String 当前系统时间的字符串* @throws */public static String getToday(String format) {return new SimpleDateFormat(format).format(new Date());}/*** 根据格式化字符串,返回指定时间的字符串* @param date 指定时间* @param format 日期时间格式化SimpleDateFormat* @return 指定时间的字符串*/public static String format(Date date, SimpleDateFormat format) {if (date == null) {return null;}return format.format(date);}/*** <li>说明:根据格式化对象,返回当前系统时间的字符串* @param format 日期时间格式化对象* @return String 当前系统时间的字符串*/public static String getToday(SimpleDateFormat format) {return format.format(new Date());}/*** <li>说明:默认返回当前系统时间字符串,格式为“yyyy-MM-dd”。* @return String 当前系统时间字符串,格式为“yyyy-MM-dd* @throws */public static String getToday() {return new SimpleDateFormat("yyyy-MM-dd").format(new Date());}/*** <li>说明:默认返回当前系统时间字符串,格式为“MMdd”。* @return String 当前系统时间字符串,格式为“yyyy-MM-dd* @throws */public static String getTodayMMdd() {return MMdd.format(new Date());} /*** <li>说明:获得两个日期的月差* @param Calendar one:第一个日历对象* @param Calendar two:第二个日历对象* @return int 相差的月数* @throws */public static int monthDifference(Calendar one, Calendar two) {if (null == one || null == two) {throw new NullPointerException("参数对象为空。");}Calendar after = one;Calendar before = two;if (one.before(two)) {after = two;before = one;}int deffYear = Math.abs(after.get(Calendar.YEAR) - before.get(Calendar.YEAR));int deffMonth = after.get(Calendar.MONTH) - before.get(Calendar.MONTH);/*if (deffMonth < 0) {deffYear = deffYear - 1;deffMonth = Math.abs(deffMonth);}*/ //错误的逻辑块return deffYear * 12 + deffMonth;}/*** <li>说明:获得两个日期的月差* @param Date one:第一个日期* @param Date two:第二个日期 * @return int 相差的月数* @throws */public static int monthDifference(Date one, Date two) {Calendar first = new GregorianCalendar();first.setTime(one);Calendar second = new GregorianCalendar();second.setTime(two);return monthDifference(first, second);}/*** <li>说明:获得两个日期的月差* @param String one:第一个日期字符串,格式必须为“yyyy-MM-dd”* @param String two:第二个日期字符串,格式必须为“yyyy-MM-dd”* @return int 相差的月数* @throws ParseException*/public static int monthDifference(String one, String two)throws ParseException {Format format = new SimpleDateFormat("yyyy-MM-dd");Date first = (java.util.Date) format.parseObject(one);Date second = (java.util.Date) format.parseObject(two);return monthDifference(first, second);}/*** <li>说明:是否为月的最后一天* @param Calendar calendar:日历对象* @return boolean true=是,false=否* @throws */public static boolean isLastDayOfMonth(Calendar calendar) {Calendar today = calendar;Calendar tomorrow = (Calendar) calendar.clone();tomorrow.add(Calendar.DAY_OF_MONTH, 1);int todayYear = today.get(Calendar.YEAR);int todayMonth = today.get(Calendar.MONTH) + 1;int tomorrowYear = tomorrow.get(Calendar.YEAR);int tomorrowMonth = tomorrow.get(Calendar.MONTH) + 1;//是否为当月最后一天if (tomorrowYear > todayYear || (tomorrowYear == todayYear && tomorrowMonth > todayMonth)) {return true;}return false;}/*** <li>说明: 是否为月的最后一天* @param Date date:日期对象 * @return boolean true=是,false=否* @throws */public static boolean isLastDayOfMonth(Date date) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);return isLastDayOfMonth(calendar);}/*** <li>说明:当前系统时间当天是否为月的最后一天* @return boolean true=是,false=否* @throws */public static boolean isLastDayOfMonth() {return isLastDayOfMonth(Calendar.getInstance());}/*** <li>说明:将数字表示的月份转换位成中文表示的月份* @param int month:数字月份* @return String 中文月份* @throws */public static String convertMonth(int month) {switch (month) {case Calendar.JANUARY:return "一月";case Calendar.FEBRUARY:return "二月";case Calendar.MARCH:return "三月";case Calendar.APRIL:return "四月";case Calendar.MAY:return "五月";case Calendar.JUNE:return "六月";case Calendar.JULY:return "七月";case Calendar.AUGUST:return "八月";case Calendar.SEPTEMBER:return "九月";case Calendar.OCTOBER:return "十月";case Calendar.NOVEMBER:return "十一月";case Calendar.DECEMBER:return "十二月";default:throw new IllegalArgumentException("表示月份的参数无效:" + month);}}/*** <li>说明:将数字表示的周天转换位成中文表示的周天* @param int dayOfWeek:该天在一周内的数字序号,从0开始(周日0-周六6)* @return String 返回具体周天名称* @throws */public static String convertDayOfWeek(int dayOfWeek) {switch (dayOfWeek) {case Calendar.SUNDAY:return "周日";case Calendar.MONDAY:return "周一";case Calendar.TUESDAY:return "周二";case Calendar.WEDNESDAY:return "周三";case Calendar.THURSDAY:return "周四";case Calendar.FRIDAY:return "周五";case Calendar.SATURDAY:return "周六";default:throw new IllegalArgumentException("参数无效:" + dayOfWeek);}}/*** <li>说明:将数字表示的周天转换位成中文表示的星期* @param int dayOfWeek:该天在一星期内的数字序号,从0开始(星期天0-星期六6)* @return String 星期几名称* @throws */public static String convertDayOfWeek2(int dayOfWeek) {switch (dayOfWeek) {case Calendar.SUNDAY:return "星期天";case Calendar.MONDAY:return "星期一";case Calendar.TUESDAY:return "星期二";case Calendar.WEDNESDAY:return "星期三";case Calendar.THURSDAY:return "星期四";case Calendar.FRIDAY:return "星期五";case Calendar.SATURDAY:return "星期六";default:throw new IllegalArgumentException("参数无效:" + dayOfWeek);}}/*** <li>说明:获取当天是星期几。* 注意:不能使用new Date().getDay()获取当天在星期中的位置,应该使用Calendar.getInstance().get(Calendar.DAY_OF_WEEK)获取当天在星期中的位置* @return String 星期几名称* @throws */public static String getTodayOfWeek2() {return convertDayOfWeek2(Calendar.getInstance().get(Calendar.DAY_OF_WEEK));}/*** <li>说明:获取当天是周几。* 注意:不能使用new Date().getDay()获取当天在星期中的位置,应该使用Calendar.getInstance().get(Calendar.DAY_OF_WEEK)获取当天在星期中的位置* @return String 返回具体周天名称* @throws */public static String getTodayOfWeek() {return convertDayOfWeek(Calendar.getInstance().get(Calendar.DAY_OF_WEEK));} /*** * <li>说明:将毫秒数转换为日期格式的字符串* @param millSeconds 毫秒数* @param parseStr 日期格式化字符串 如"yyyy-MM-dd hh:mm:ss"* @return 日期格式的字符串*/public static String getDateByMillSeconds(long millSeconds, String parseStr){ java.text.SimpleDateFormat format = new java.text.SimpleDateFormat(parseStr); String sb=format.format(getDateByMillSeconds(millSeconds)); return sb;}/*** * <li>说明:将毫秒数转换为日期* @param millSeconds 毫秒数* @return 日期*/public static Date getDateByMillSeconds(long millSeconds){Date date = new Date(millSeconds); GregorianCalendar gc = new GregorianCalendar(); gc.setTime(date); return gc.getTime();}/*** * <li>说明:获取服务器时间,本月的第一天* @return 获取服务器时间,本月的第一天*/public static String getFirstDayByCurrentMonth(){Calendar calendar = new GregorianCalendar();calendar.set( Calendar.DATE, 1 );SimpleDateFormat simpleFormate = new SimpleDateFormat( "yyyy-MM-dd" );return simpleFormate.format(calendar.getTime());}/*** * <li>说明:获取服务器时间, 本月的最后一天* @return 获取服务器时间, 本月的最后一天*/public static String getLastDayByCurrentMonth(){Calendar calendar = new GregorianCalendar();calendar.set( Calendar.DATE, 1 );calendar.roll(Calendar.DATE, - 1 );SimpleDateFormat simpleFormate = new SimpleDateFormat( "yyyy-MM-dd" );return simpleFormate.format(calendar.getTime());}/*** * <li>说明:获取实际工期(分钟数)临时使用,以后有工作日历再做修改* @param realStartDate 实际开工时间* @param realEndDate 实际完工时间* @return 实际工期(分钟数)* @throws Exception*/public static Long getRealWorkminutes(Date realStartDate, Date realEndDate) throws Exception{BigDecimal realWorkminutes = new BigDecimal("0");long startTime = 0l;long endTime = 0l;long timeInterval = 0l; if(realStartDate != null && realEndDate != null) {startTime = realStartDate.getTime();endTime = realEndDate.getTime();timeInterval = endTime - startTime;if(timeInterval > 0){int day = (int)timeInterval/(24*60*60*1000); int hour = (int)timeInterval/(60*60*1000)-day*24; int min = (int)(timeInterval/(60*1000))-day*24*60-hour*60;if(day >= 1){realWorkminutes = new BigDecimal(day*8*60);if(hour >= 1){realWorkminutes = realWorkminutes.add(new BigDecimal(hour*20));}if(min >=1){realWorkminutes = realWorkminutes.add(new BigDecimal(min));}}else{if(hour >= 1){realWorkminutes = realWorkminutes.add(new BigDecimal(hour*60>=480?480:hour*60));}if(min >=1){realWorkminutes = realWorkminutes.add(new BigDecimal(min));}if(realWorkminutes.compareTo(new BigDecimal(480)) > 0) realWorkminutes = new BigDecimal(480);}}}return Long.valueOf(String.valueOf(realWorkminutes));}/*** <li>说明:得到两个日期间隔的天数* @param String beginDate 开始日期"yyyy-MM-dd"* @param String endDate 结束日期"yyyy-MM-dd"* @return int 相差天数* @throws ParseException*/public static int getDaysBetween(String beginDate, String endDate)throws ParseException {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");Date bDate = format.parse(beginDate);Date eDate = format.parse(endDate);return getDaysBetween(bDate, eDate);}/*** <li>说明:得到两个日期间隔的天数* @param Date beginDate 开始日期* @param Date endDate 结束日期* @return int 相差天数* @throws ParseException*/public static int getDaysBetween(Date beginDate, Date endDate)throws ParseException {Calendar g1 = new GregorianCalendar();g1.setTime(beginDate);Calendar g2 = new GregorianCalendar();g2.setTime(endDate);int elapsed = 0;GregorianCalendar gc1, gc2;if (g2.after(g1)) {gc2 = (GregorianCalendar) g2.clone();gc1 = (GregorianCalendar) g1.clone();} else {gc2 = (GregorianCalendar) g1.clone();gc1 = (GregorianCalendar) g2.clone();}gc1.clear(Calendar.MILLISECOND);gc1.clear(Calendar.SECOND);gc1.clear(Calendar.MINUTE);gc1.clear(Calendar.HOUR_OF_DAY);gc2.clear(Calendar.MILLISECOND);gc2.clear(Calendar.SECOND);gc2.clear(Calendar.MINUTE);gc2.clear(Calendar.HOUR_OF_DAY);while (gc1.before(gc2)) {gc1.add(Calendar.DATE, 1);elapsed++;}return elapsed;} /*** <li>说明:根据开始时间和时长获取完成时间* @param startTime 开始时间* @param timeInterval 时长* @return 完成时间*/public static long getFinalTime(long startTime, long timeInterval) {return startTime + timeInterval;}}