0基础如何快速做网站营销团队外包

时间之间的相互转换，是每一个程序员在现实开发中是不可避免的也是经常遇到里问题，今天做个全面的总结，希望对你有所帮助。

public class DateUtils {private final static Logger logger = Logger.getLogger(DateUtils.class);public final static String DATE__FORMAT__YYYYMMDD = "yyyy/MM/dd HH:mm:ss";public final static String DATE_FORMAT_YYYYMMDD = "yyyyMMdd";public final static String DATE_FORMAT_YYYY_MM_DD = "yyyy-MM-dd";public final static String DATETIME_FORMAT_HHMMSS = "HHmmss";public final static String DATETIME_FORMAT_HHMMSSsss = "HHmmssSSS";public final static String DATETIME_FORMAT_YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";public final static String DATETIME_FORMAT_YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm";public final static String DATETIME_FORMAT_YYYYMMDDHHMMSS = "yyyyMMddHHmmss";public final static String DATETIME_FORMAT_YYYYMMDDHH = "yyyyMMddHH";public final static String DATETIME_FORMAT_YYYYMMDDHHMMSSSSS = "yyyyMMddHHmmssSSS";public final static String DATETIME_FORMAT_YYYY = "yyyy";public final static String DATETIME_FORMAT_YYYY_MM_DD_CN = "yyyy年MM月dd日";public final static String DATETIME_FORMAT_HH_MM_SS = "HH:mm:ss";public final static String DATE_FORMAT_YYYYPOINTMMPOINTDD = "yyyy.MM.dd";public final static String DATETIME_FORMAT_YYYY_MM_DD_HH_MM_SS_SSS = "yyyy-MM-dd HH:mm:ss,SSS";public final static String DATE_FORMAT_YYMMDD = "yyMMdd";public final static String DATETIME_FORMAT_YYYYTMM_DD_HH_MM_SS = "yyyy-MM-dd'T'HH:mm:ss";public final static String DATE_FORMAT_YYYYMM = "yyyyMM";public final static String DATE_FORMAT_YYYYMMDD_HH_MM_SS = "yyyyMMdd HH:mm:ss";public static final String DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";public static final String DATE_FORMAT = "yyyy-MM-dd";public static final String DATE_EEE = "EEE MMM dd HH:mm:ss zzz yyyy";private static SimpleDateFormat sdf = new SimpleDateFormat();public  static String  DateTime(String date){String simpDate = null;try {if(StringUtil.isNotBlank(date)){SimpleDateFormat df = new SimpleDateFormat(DATE_EEE,Locale.US);Date	date1 = df.parse(date);simpDate= DateUtils.getDateTimeToString(date1,DateUtils.DATETIME_FORMAT_YYYY_MM_DD_HH_MM_SS);}} catch (ParseException e) {logger.error("DateTime"+e);}return  simpDate;}/*** 日期 +天数* * @param dtInput*            日期* @param intDay*            天数* @return 日期* @author cookie*/public static Date addDay(java.util.Date dtInput, int intDay) {if (dtInput == null) {return null;}java.util.Date dtReturn = null;GregorianCalendar gcalender = new GregorianCalendar();gcalender.setTime(dtInput);gcalender.add(Calendar.DATE, intDay);dtReturn = gcalender.getTime();return dtReturn;}/*** date转 String* * @param aDate*            日期 类型* @return Stirng类型 yyyy/MM/dd* @throws Exception* @author cookie*/public static String converDateToString(java.util.Date aDate){SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd");return formatter.format(aDate);}/*** 计算两个日期 之间的天数 、年数、月数* * @param Mode*            Y 年 M 为月 D 为日* @param StartDate*            开始时间* @param EndDate*            结束时间* @return 天数或年数或月数* @author cookie*/public static int dateDiff(String Mode, Date StartDate, Date EndDate) {if (EndDate.getTime() - StartDate.getTime() == 0)return 0;Calendar cal = Calendar.getInstance();cal.setTime(StartDate);int StDtYr = cal.get(Calendar.YEAR);int StDtMth = cal.get(Calendar.MONTH);int StDtDay = cal.get(Calendar.DATE);cal.setTime(EndDate);int EdDtYr = cal.get(Calendar.YEAR);int EdDtMth = cal.get(Calendar.MONTH);int EdDtDay = cal.get(Calendar.DATE);int YrDiff = EdDtYr - StDtYr;int MthDiff = EdDtMth - StDtMth;int DayDiff = EdDtDay - StDtDay;if ("Y".equalsIgnoreCase(Mode)) {if (YrDiff <= 0) {return 0;} else {if (MthDiff < 0)return YrDiff - 1;else if (MthDiff > 0)return YrDiff;else if (DayDiff < 0)return YrDiff - 1;elsereturn YrDiff;}} else if ("M".equalsIgnoreCase(Mode)) {int retVal = dateDiff("Y", StartDate, EndDate) * 12;if (YrDiff == 0)if (MthDiff != 0) {if (DayDiff < 0) {--MthDiff;return MthDiff;}return MthDiff;} else {return 0;}if (MthDiff == 0) {if (DayDiff >= 0)return retVal;else {retVal += (12 - StDtMth) + EdDtMth - 1;return retVal;}} else if (MthDiff < 0)retVal = retVal + (12 - StDtMth) + EdDtMth;elseretVal = retVal + MthDiff;if (DayDiff < 0)retVal = retVal - 1;return retVal;} else if ("D".equalsIgnoreCase(Mode)) {return Integer.parseInt(String.valueOf((EndDate.getTime() - StartDate.getTime()) / (24 * 60 * 60 * 1000)));} else if ("H".equalsIgnoreCase(Mode)) {return Integer.parseInt(String.valueOf((EndDate.getTime() - StartDate.getTime()) / (24 * 60 * 60 * 1000)));} else {return -1;}}/*** 获取两个日期相减的小时数* * @param startDt* @param endDt* @return* @author cookie*/public static long getDataHour(Date startDt, Date endDt) {int iDff = dateDiff("D", startDt, endDt);long nh = 1000 * 60 * 60;long nd = 1000 * 24 * 60 * 60;long hour = iDff % nd / nh;return hour;}/*** 字符串日期转换成java.util.Date对象* * @param strDate*            日期字符串* @return java.util.Date对象* @author cookie*/public static Date string2Date(String strDate) {Date date = null;try {if (strDate.contains("-")) {sdf.applyPattern("yyyy-MM-dd");} else if (strDate.contains("/")) {sdf.applyPattern("yyyy/MM/dd");} else if (strDate.length() == 8) {sdf.applyPattern("yyyyMMdd");}date = sdf.parse(strDate);} catch (ParseException e) {logger.error("string2Date"+e);}return date;}/*** 获取当天日期 的小时* * @return 小时* @author cookie*/public static int getCurHour() {Date dtSys = new Date();sdf.applyPattern("yyyy-MM-dd HH:mm:ss");String strDate = sdf.format(dtSys);String strHour = strDate.substring(11, 13);return Integer.parseInt(strHour);}/*** 获取6位日期* * @return* @author cookie*/public static String getStr6ToDt() {Date dt = new Date();sdf.applyPattern("yyyyMMdd");return sdf.format(dt);}/*** Java将Unix时间戳转换成指定java.util.Date对象* * @param timestampString*            时间戳 如："1473048265";* @return 返回结果 java.util.Date对象*/public static Date unixTimeStamp2Date(String timestampString) {Long timestamp = Long.parseLong(timestampString) * 1000;return new Date(timestamp);}public static Date getSpecifiedDayAfter(Date date, int num) {Calendar c = Calendar.getInstance();c.setTime(date);int day = c.get(Calendar.DATE);c.set(Calendar.DATE, day + num);return c.getTime();}/*** 获得指定单位的，指定时段前的日期* * @param date*            当前日期* @param field*            时间单位 和Calendar类中对应的常量值一致* @param num*            时间间隔* @return*/public static Date getDateBefore(Date date, int field, int num) {Calendar c = Calendar.getInstance();c.setTime(date);int value = c.get(field);c.set(field, value - num);return c.getTime();}/*** 日期间隔是否大于指定数* * @param begin* @param end* @param timeinmill* @return*/public static boolean isAfterInMill(Date begin, Date end, long timeinmill) {long begininmill = begin.getTime();long endinmill = end.getTime();if (endinmill - begininmill > timeinmill) {return true;} else {return false;}}/*** 比较两个时间大小 wangbo 2009.5.5* * @param first* @param second* @return <0: first<second =0: first=second >0: first>second*/public static int compareTwoDate(Date first, Date second) {Calendar c1 = java.util.Calendar.getInstance();Calendar c2 = java.util.Calendar.getInstance();c1.setTime(first);c2.setTime(second);return c1.compareTo(c2);}/*** 取得当前日期所在周的第一天* * @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());return c.getTime();}/*** 取得当前日期所在周的最后一天* * @param date* @return*/public static Date getLastDayOfWeek(Date date) {Calendar c = new GregorianCalendar();c.setFirstDayOfWeek(Calendar.MONDAY);c.setTime(date);// Sundayc.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6);return c.getTime();}/*** 计算日期增加或减少小时数后的日期* * @param date* @param i*            为负表示减多少小时* @return*/public static Date addHH(Date date, int i) {if (date == null)return null;Calendar c = new GregorianCalendar();c.setTime(date);c.add(Calendar.HOUR, i);return c.getTime();}/*** 计算日期增加或减少分钟数后的日期* * @param date* @param i*            为负表示减多少分钟* @return*/public static Date addMM(Date date, int i) {if (date == null) {return null;}Calendar c = new GregorianCalendar();c.setTime(date);c.add(Calendar.MINUTE, i);return c.getTime();}/*** 计算日期增加或减少秒数后的日期* * @param date* @param i*            为负表示减多少秒* @return*/public static Date addSS(Date date, int i) {if (date == null) {return null;}Calendar c = new GregorianCalendar();c.setTime(date);c.add(Calendar.SECOND, i);return c.getTime();}/*** 计算日期增加减少天数后的日期* * @param date* @param i*            为负表示减多少天* @return*/public static Date addDate(Date date, int i) {if (date == null) {return null;}Calendar c = new GregorianCalendar();c.setTime(date);c.add(Calendar.DATE, i);return c.getTime();}/*** 计算日期增加减少月数后的日期* * @param date* @param i*            为负表示减多少月* @return*/public static Date addMonth(Date date, int i) {if (date == null) {return null;}Calendar c = new GregorianCalendar();c.setTime(date);c.add(Calendar.MONTH, i);return c.getTime();}/*** 计算日期增加减少年数后的日期* * @param date* @param i*            为负表示减多少年* @return*/public static Date addYear(Date date, int i) {if (date == null) {return null;}Calendar c = new GregorianCalendar();c.setTime(date);c.add(Calendar.YEAR, i);return c.getTime();}/*** 获得当前时间字符串* * @param formatStr*            日期格式* @return string yyyy-MM-dd*/public static String getNowDateStr(String formatStr) {SimpleDateFormat format = new SimpleDateFormat(formatStr);return format.format(getNowDate());}/*** 获得系统当前时间* * @return Date*/public static Date getNowDate() {Calendar c = Calendar.getInstance();return c.getTime();}/*** 把日期按照指定格式的转化成字符串* * @param date*            日期对象* @param formatStr*            日期格式* @return 字符串式的日期*/public static String getDateTimeToString(Date date, String formatStr) {SimpleDateFormat format = new SimpleDateFormat(formatStr);return format.format(date);}/*** 把日期字符串转化成指定格式的日期对象* * @param dateStr*            日期字符串* @param formatStr*            日期格式* @return Date类型的日期* @throws Exception*/public static Date getStringToDateTime(String dateStr, String formatStr){Date date = null;try{SimpleDateFormat format = new SimpleDateFormat(formatStr);date = format.parse(dateStr);}catch (ParseException e){logger.error("getStringToDateTime",e);}return date;}/*** 把日期字符串转化成指定格式的日期字符串* * @return String类型的日期* @throws Exception*/public static String getStringToString(String date, String oldPattern,String newPattern)  {try{if (date == null || oldPattern == null || newPattern == null){return "";}SimpleDateFormat sdf1 = new SimpleDateFormat(oldPattern);SimpleDateFormat sdf2 = new SimpleDateFormat(newPattern);Date d = null;// 将给定的字符串中的日期提取出来d = sdf1.parse(date);return sdf2.format(d);}catch (ParseException e){logger.error("getStringToString",e);}return null;}/*** 把日期字符串转化成指定格式的日期对象，如果异常则返回null* * @param dateStr*            日期字符串* @param formatStr*            日期格式* @return Date类型的日期* @throws Exception*/public static Date getStringToDateTimeExceptionNull(String dateStr,String formatStr) {Date date = null;if (StringUtil.isBlank(dateStr)) {return date;}SimpleDateFormat format = new SimpleDateFormat(formatStr);try {date = format.parse(dateStr);} catch (ParseException e) {logger.error("日期格式错误：" + dateStr, e);return null;}return date;}/*** 校验日期与格式是否一致* * @param dttm* @param format* @return*/public static boolean isDate(String dttm, String format) {if (dttm == null || dttm.isEmpty() || format == null|| format.isEmpty()) {return false;}if (format.replaceAll("'.+?'", "").indexOf("y") < 0) {format += "/yyyy";DateFormat formatter = new SimpleDateFormat("/yyyy");dttm += formatter.format(new Date());}DateFormat formatter = new SimpleDateFormat(format);formatter.setLenient(false);ParsePosition pos = new ParsePosition(0);Date date = formatter.parse(dttm, pos);if (date == null || pos.getErrorIndex() > 0) {return false;}if (pos.getIndex() != dttm.length()) {return false;}if (formatter.getCalendar().get(Calendar.YEAR) > 9999) {return false;}return true;}/*** 获得当前时间的i分钟后（或前，用负数表示）的时间* * @param i* @return*/public static String addMM(int i) {Date currTime = addMM(getNowDate(), i);SimpleDateFormat format = new SimpleDateFormat(DATETIME_FORMAT_YYYYMMDDHHMMSS);return format.format(currTime);}/*** 获得某个时间的i分钟后（或前，用负数表示）的时间* * @param i* @return*/public static String dateAddMM(Date date, int i) {Date currTime = addMM(date, i);SimpleDateFormat format = new SimpleDateFormat(DATETIME_FORMAT_YYYYMMDDHHMMSS);return format.format(currTime);}/*** @param date*            获取给定日期的起初时间 XX-XX-XX 00:00:00* @return date*/public static Date getBegin(Date date) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);return calendar.getTime();}/*** @param date*            获取给定日期的结束时间 XX-XX-XX 23:59:59* @return date*/public static Date getEnd(Date date) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.set(Calendar.HOUR_OF_DAY, 23);calendar.set(Calendar.MINUTE, 59);calendar.set(Calendar.SECOND, 59);return calendar.getTime();}public static boolean isBeforeToday(Date theDay) {Calendar cNow = Calendar.getInstance();int iYear = cNow.get(Calendar.YEAR);int iDay = iYear * 1000 + cNow.get(Calendar.DAY_OF_YEAR);Calendar cDay = Calendar.getInstance();cDay.setTime(theDay);int iTheYear = cDay.get(Calendar.YEAR);int iTheDay = iTheYear * 1000 + cDay.get(Calendar.DAY_OF_YEAR);return iTheDay < iDay;}public static boolean isToday(Date theDay) {Calendar cNow = Calendar.getInstance();int iYear = cNow.get(Calendar.YEAR);int iDay = cNow.get(Calendar.DAY_OF_YEAR);Calendar cDay = Calendar.getInstance();cDay.setTime(theDay);int iTheYear = cDay.get(Calendar.YEAR);int iTheDay = cDay.get(Calendar.DAY_OF_YEAR);return (iTheYear == iYear) && (iTheDay == iDay);}public static boolean isToday240000(Date theDay) {Date tomorrow = getSpecifiedDayAfter(getNowDate(), 1);String strDate = getDateTimeToString(tomorrow, DATE_FORMAT_YYYYMMDD);strDate += "000000";Date target = getStringToDateTimeExceptionNull(strDate,DATETIME_FORMAT_YYYYMMDDHHMMSS);return compareTwoDate(theDay, target) == 0;}/*** 计算两个日期之间的相差的天数. 计算方式：second - first* <p>* Create Date: 2015年1月22日* </p>* * @param smdate*            较小的时间* @param bdate*            较大的时间* @return 相差的天数*/public static int daysBetween(Date smdate, Date bdate) {int result = 0;SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");try {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);result = Integer.parseInt(String.valueOf(between_days));} catch (ParseException e) {logger.error("日期转化异常", e);}return result;}/*** 计算两个日期之间的相差的秒数. 计算方式：second - first* * @param smdate*            较小的时间* @param bdate*            较大的时间* @return 相差的秒数*/public static int secondsBetween(Date smdate, Date bdate) {int result = 0;Calendar cal = Calendar.getInstance();cal.setTime(smdate);long time1 = cal.getTimeInMillis();cal.setTime(bdate);long time2 = cal.getTimeInMillis();long between_min = (time2 - time1) / 1000;result = Integer.parseInt(String.valueOf(between_min));return result;}/*** 计算两个日期之间的相差的小时数. 计算方式：second - first* * @param smdate*            较小的时间* @param bdate*            较大的时间* @return 相差的秒数*/public static int hoursBetween(Date smdate, Date bdate) {int result = 0;Calendar cal = Calendar.getInstance();cal.setTime(smdate);long time1 = cal.getTimeInMillis();cal.setTime(bdate);long time2 = cal.getTimeInMillis();long between_min = (time2 - time1) / (60 * 60 * 1000);result = Integer.parseInt(String.valueOf(between_min));return result;}/*** 将时间戳转换为date* <p>* Create Date: 2015年3月30日* </p>* * @param seconds* @return*/public static Date getTimestampToDate(long seconds) {Calendar calendar = Calendar.getInstance();calendar.setTimeInMillis(seconds);return calendar.getTime();}/*** 获取系统当前日期的前一天* * @return Date*/public static Date beforeCurrentDate(String formatStr) {Date ret = null;SimpleDateFormat formatter = new SimpleDateFormat(formatStr);try {Calendar calendar = Calendar.getInstance();// calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 1);calendar.add(Calendar.DAY_OF_MONTH, -1);ret = formatter.parse(formatter.format(calendar.getTime()));} catch (ParseException e) {logger.error("时间格式错误" + e);}return ret;}// yyyyMMddHHmmsspublic static String getYMDHMS() {String strYMDHMS = "";Date currentDateTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");strYMDHMS = formatter.format(currentDateTime);return strYMDHMS;}/*** 获取当期日期格式yyyyMMdd* * @return Date*/public static Date currentDateToDate() {Date currentDateTime = new Date();Date yyyymmdd = null;SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");try {yyyymmdd = formatter.parse(formatter.format(currentDateTime));} catch (ParseException e) {logger.error("currentDateToDate",e);}return yyyymmdd;}/*** 获取当前日期格式yyyyMMdd* * @return Date*/public static Date currentDateToDate(String formatStr) {Date currentDateTime = new Date();Date date = null;SimpleDateFormat formatter = new SimpleDateFormat(formatStr);try {date = formatter.parse(formatter.format(currentDateTime));} catch (ParseException e) {logger.error("currentDateToDate"+e);}return date;}/*** 从Date类型格式取得日期字符串"yyyyMMdd"* * @param tempDateTime* @return 20090508 xingyan add*/public static String getDateStringFromDate(Date tempDateTime) {String moedifiedTime = null;SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");moedifiedTime = new String(dateFormat.format(tempDateTime));return moedifiedTime;}public static String getTimestampString(String formatStr) {Timestamp ts = new Timestamp(System.currentTimeMillis());String tsStr = "";DateFormat sdf = new SimpleDateFormat(formatStr);tsStr = sdf.format(ts);return tsStr;}public static int getDayofWeek(Date date) {Calendar rightNow = Calendar.getInstance();rightNow.setTime(date);int day = rightNow.get(Calendar.DATE);rightNow.set(Calendar.DATE, day - 1);return rightNow.get(Calendar.DAY_OF_WEEK);}/*** @description <p>*              获取当天开始时间*              </p>*              比如 2017-6-7 0:00:00* @auther liujian* @date 2017年6月7日 下午5:01:19* @update* @return*/public static Date getCurrDayStart() {Calendar c1 = new GregorianCalendar();c1.set(Calendar.HOUR_OF_DAY, 0);c1.set(Calendar.MINUTE, 0);c1.set(Calendar.SECOND, 0);c1.set(Calendar.MILLISECOND, 0);return c1.getTime();}/*** @return* @description <p>*              获取当天结束时间*              </p>*              比如 2017-6-7 23:59:59* @auther liujian* @date 2017-6-7 下午5:02:27* @update*/public static Date getCurrDayEnd() {Calendar c1 = new GregorianCalendar();c1.set(Calendar.HOUR_OF_DAY, 23);c1.set(Calendar.MINUTE, 59);c1.set(Calendar.SECOND, 59);c1.set(Calendar.MILLISECOND, 999);return c1.getTime();}/*** * @description <p>*              获取前月的第一天*              </p>* @auther liujian* @date 2017年11月27日 下午8:53:56* @update* @return*/public static Date getCurrMonthStart() {Calendar cale = null;cale = Calendar.getInstance();cale = Calendar.getInstance();cale.add(Calendar.MONTH, 0);cale.set(Calendar.DAY_OF_MONTH, 1);return cale.getTime();}/*** * @description <p>*              获取前月的最后一天*              </p>* @auther liujian* @date 2017年11月27日 下午8:54:03* @update* @return*/public static Date getCurrMonthEnd() {Calendar cale = null;cale = Calendar.getInstance();cale = Calendar.getInstance();cale.add(Calendar.MONTH, 1);cale.set(Calendar.DAY_OF_MONTH, 0);return cale.getTime();}/*** @author ken chen* @param 第一个日期*            startDate 小 2017 yyyy* @param 第二个日期*            endDate 大 2018 yyyy* @return 天数 1* **/public static int yearDateDiff(String startDate, String endDate) {Calendar calBegin = Calendar.getInstance(); // 获取日历实例Calendar calEnd = Calendar.getInstance();calBegin.setTime(stringTodate(startDate, "yyyy")); // 字符串按照指定格式转化为日期calEnd.setTime(stringTodate(endDate, "yyyy"));return calEnd.get(Calendar.YEAR) - calBegin.get(Calendar.YEAR);}// 字符串按照指定格式转化为日期public static Date stringTodate(String dateStr, String formatStr) {// 如果时间为空则默认当前时间Date date = null;SimpleDateFormat format = new SimpleDateFormat(formatStr);if (dateStr != null && !dateStr.equals("")) {String time = "";try {Date dateTwo = format.parse(dateStr);time = format.format(dateTwo);date = format.parse(time);} catch (ParseException e) {logger.error("stringTodate"+e);}} else {String timeTwo = format.format(new Date());try {date = format.parse(timeTwo);} catch (ParseException e) {logger.error("stringTodate"+e);}}return date;}
}

Long testTime = (Long)map.get("testTime");  

DateUtils.getDateTimeToString(new Date(testTime),DateUtils.DATETIME_FORMAT_YYYY_MM_DD_HH_MM_SS)