目录
(1)需要导入的包
主要用于Strings.isNullOrEmpty(date)
com.google.guava guava 27.0.1-jre
(2)DateUtil类
import com.google.common.base.Strings;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.Locale;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * * 功能描述：日期工具 * */public class DateUtil { /** yyyy-MM-dd */ public static String YYYYMMDD = "yyyy-MM-dd"; /** yyyyMMdd */ public static String yyyyMMdd = "yyyyMMdd"; /** yyyyMMddHHmmss */ public static String yyyyMMddHHmmss = "yyyyMMddHHmmss"; /** yyyy-MM-dd HH:mm:ss **/ public static String YYYYMMDDHHMMSS = "yyyy-MM-dd HH:mm:ss"; public static String DDMMMYYYY = "ddMMMyyyy"; public static String yyyyMMddHHmm = "yyyy-MM-dd HH:mm"; /** * 返回当前时间字符串 YYYYMMDDHHMMSS * * @return */ public static String getNow() { return format(new Date(), YYYYMMDDHHMMSS); } public static String getNow(String format) { return format(new Date(), format); } public static Date getToday() { Calendar now = Calendar.getInstance(); return getYYYYMMDD(format(now.getTime(), YYYYMMDD)); } /** * * Description:将字符串转化为日期 *
* * @param dateString * 日期字符串 * @return yyyy-MM-dd * @throws Exception */ public static Date getYYYYMMDD(String dateString) { SimpleDateFormat dateFormat = new SimpleDateFormat(YYYYMMDD); Date dateTime = null; try { dateTime = dateFormat.parse(dateString); } catch (ParseException e) { dateTime = null; } // END TRY return dateTime; } public static Date getYYYYMMDDHHMMSS(String dateString) { SimpleDateFormat dateFormat = new SimpleDateFormat(YYYYMMDDHHMMSS); Date dateTime = null; try { dateTime = dateFormat.parse(dateString); } catch (ParseException e) { dateTime = null; } // END TRY return dateTime; } public static Date stringtoDate(String dateString) { SimpleDateFormat dateFormat = new SimpleDateFormat(YYYYMMDDHHMMSS); Long time=new Long(dateString); String d = dateFormat.format(time); Date date = null; try { date = dateFormat.parse(d); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } return date; } /** * Get Date from String "yyyy-MM-dd HH:mm" * * @param dateString * @return */ public static Date getYYYYMMDDHHmm(String dateString) { SimpleDateFormat dateFormat = new SimpleDateFormat(yyyyMMddHHmm); Date dateTime = null; try { dateTime = dateFormat.parse(dateString); } catch (ParseException e) { dateTime = null; } // END TRY return dateTime; } /** * 得到當前日期為周幾 * * @param date * @return */ public static int dayOfWeek(Date date) { Calendar aCalendar = Calendar.getInstance(); aCalendar.setTime(date); int x = aCalendar.get(Calendar.DAY_OF_WEEK); return x; } /** * 得到當前日期為周幾 * * @param date * @return */ public static String getWeek(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return new SimpleDateFormat("EEEE").format(c.getTime()); } /** * 得到几天前的时间 */ public static Date getDateBefore(Date d, int day) { Calendar now = Calendar.getInstance(); now.setTime(d); now.set(Calendar.DATE, now.get(Calendar.DATE) - day); return now.getTime(); } /** * 返回字符型日期时间 * * @param date * 日期 * @return 返回字符型日期时间 */ public static String getDateTime(Date date) { return format(date, "yyyy-MM-dd HH:mm:ss"); } /** * 返回字符型日期时间 * * @param date * 日期 * @return 返回字符型日期时间 */ public static String getDateTime(Date date ,String format) { return format(date, format); } /** * 格式化输出日期 * * @param date * 日期 * @param format * 格式 * @return 返回字符型日期 */ public static String format(Date date, String format) { String result = ""; try { if (date != null) { java.text.DateFormat df = new SimpleDateFormat(format); result = df.format(date); } } catch (Exception e) { } return result; } /** * 将日期类型格式化为字符串 * * @param date * yyyy-MM-dd HH:mm:ss * @return */ public static String format(Date date) { return format(date, YYYYMMDDHHMMSS); } public static String format(Long millis) { Calendar now = Calendar.getInstance(); now.setTimeInMillis(millis); return format(now.getTime(), YYYYMMDDHHMMSS); } /** * 得到几天后的时间 */ public static Date getDateAfter(Date d, int day) { Calendar now = Calendar.getInstance(); now.setTime(d); now.set(Calendar.DATE, now.get(Calendar.DATE) + day); return now.getTime(); } /** * 得到几天后的时间 */ public static String getDateAfter(String d, int day) { Calendar now = Calendar.getInstance(); now.setTime(formatDate(d, DateUtil.YYYYMMDD)); now.set(Calendar.DATE, now.get(Calendar.DATE) + day); return format(now.getTime(), DateUtil.YYYYMMDD); } /** * 得到几天后的时间 */ public static String getDateAfter(String d, String format, int day) { Calendar now = Calendar.getInstance(); now.setTime(formatDate(d, format)); now.set(Calendar.DATE, now.get(Calendar.DATE) + day); return format(now.getTime(), format); } /** * @description: 根据日期，类型，数值得到加减后的日期 * @param date * 日期 * @param type * 类型，为year,month,day,hour..... * @param amount * 时间加减的数值 * @return: */ public static Date getDateAdd(Date date, String type, int amount) { if (date == null) { return date; } else { Calendar now = Calendar.getInstance(); now.setTime(date); if ("year".equalsIgnoreCase(type)) { now.add(Calendar.YEAR, amount); } else if ("month".equalsIgnoreCase(type)) { now.add(Calendar.MONTH, amount); } else if ("day".equalsIgnoreCase(type)) { now.add(Calendar.DATE, amount); } else if ("hour".equalsIgnoreCase(type)) { now.add(Calendar.HOUR_OF_DAY, amount); } else if ("minute".equalsIgnoreCase(type)) { now.add(Calendar.MINUTE, amount); } else if ("second".equalsIgnoreCase(type)) { now.add(Calendar.SECOND, amount); } else if ("millsecond".equalsIgnoreCase(type)) { now.add(Calendar.MILLISECOND, amount); } return now.getTime(); } } /** * 两个时间之间的天数 * * @param date1 * @param date2 * @return * @throws ParseException */ public static long getDays(String date1, String date2) throws ParseException { if (date1 == null || date1.equals("")) return 0; if (date2 == null || date2.equals("")) return 0; // 转换为标准时间 SimpleDateFormat myFormatter = new SimpleDateFormat(YYYYMMDD); Date date = null; Date mydate = null; date = myFormatter.parse(date1); mydate = myFormatter.parse(date2); long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000); return day; } public static long getHours(Date date1, Date date2) { if (date1 == null) return 0; if (date2 == null) return 0; long hours = (date1.getTime() - date2.getTime()) / (60 * 60 * 1000); return hours; } public static long getMins(Date date1, Date date2) { if (date1 == null) return 0; if (date2 == null) return 0; long mins = (date1.getTime() - date2.getTime()) / (60 * 1000); return mins; } /** * 两个时间之间的天数 * * @param date1 * @param date2 * @return */ public static long getDays(Date date1, Date date2) { if (date1 == null) return 0; if (date2 == null) return 0; long day = (date1.getTime() - date2.getTime()) / (24 * 60 * 60 * 1000); return day; } /** * 格式化日期 * * @param date * @return */ public static Date formatDate(String date) { Date d = null; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); try { d = sdf.parse(date); } catch (ParseException e) { e.printStackTrace(); } return d; } /** * 按指定格式格式化日期 * * @param date * @param format * @return */ public static Date formatDate(String date, String format) { Date d = null; SimpleDateFormat sdf = new SimpleDateFormat(format); try { d = sdf.parse(date); } catch (ParseException e) { e.printStackTrace(); } return d; } /** * 将yyyy-MM-dd时间格式转换成ddMMMyy * * @param dateString * @return */ public static String stringToDateddMMMyy(String dateString) { SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd"); SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy", Locale.US); try { Date dateTime = sf.parse(dateString); dateString = sdf.format(dateTime); } catch (ParseException e) { throw new RuntimeException("Not a date!"); } return dateString; } /** * 将ddMMMyy时间格式转换成yyyy-MM-dd * * @param dateString * @return */ public static String ddMMMyyToYYYYMMDD(String dateString) { SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd"); SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy", Locale.US); try { Date dateTime = sdf.parse(dateString); dateString = sf.format(dateTime); } catch (ParseException e) { throw new RuntimeException("Not a date!"); } return dateString; } /** * 将yyyy-MM-dd时间格式转换成MMMyy * * @param dateString * @return */ public static String stringToDateMMMyy(String dateString) { SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd"); SimpleDateFormat sdf = new SimpleDateFormat("MMMyy", Locale.US); try { Date dateTime = sf.parse(dateString); dateString = sdf.format(dateTime); } catch (ParseException e) { throw new RuntimeException("Not a date!"); } return dateString; } /** * 将时间格式转换成ddMMMyy * * @param date * @return */ public static String dateToDateddMMMyy(Date date) { SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy", Locale.US); String dateString = sdf.format(date); return dateString; } /** * ddMMMyy时间格式转为Date * * @param dateString * @return */ public static Date ddMMMyyToDate(String dateString) { SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy", Locale.US); try { return sdf.parse(dateString); } catch (ParseException e) { throw new RuntimeException(e.getMessage()); } } /** * 将时间格式转换成ddMMM * * @param date * @return */ public static String dateToDateddMMM(Date date) { SimpleDateFormat sdf = new SimpleDateFormat("ddMMM", Locale.US); String dateString = sdf.format(date); return dateString; } /** * ddMMMyyHHmm时间格式转为Date * * @param dateString * @return */ public static Date ddMMMyyHHmmToDate(String dateString) { SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyyHHmm", Locale.US); try { return sdf.parse(dateString); } catch (ParseException e) { throw new RuntimeException(e.getMessage()); } } /** * ddMMMyyyyHHmm时间格式转为Date * * @param dateString * @return */ public static Date ddMMMyyyyHHmmToDate(String dateString) { SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyyyyHHmm", Locale.US); try { return sdf.parse(dateString); } catch (ParseException e) { throw new RuntimeException(e.getMessage()); } } /** * 计算某个日期的前n天 * * @param date * @param count * @return */ public static Date getCountDate(Date date, int count) { Calendar c = Calendar.getInstance(); c.setTime(date); c.set(Calendar.HOUR, 0); c.set(Calendar.MINUTE, 0); c.set(Calendar.SECOND, 0); long timeCount = c.getTimeInMillis() - count * 1000 * 60 * 60 * 24;// .getTime().getTime(); c.setTimeInMillis(timeCount); return c.getTime(); } /** * 计算某个日期与当天的相差天数 * * @param date1 * @return */ public static int countDays(Date date1) { Calendar c = Calendar.getInstance(); Calendar c1 = Calendar.getInstance(); c.setTime(date1); c.set(Calendar.HOUR, 0); c.set(Calendar.MINUTE, 0); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); c1.setTime(new Date()); c1.set(Calendar.HOUR, 0); c1.set(Calendar.MINUTE, 0); c1.set(Calendar.SECOND, 0); long count = c.getTimeInMillis() - c1.getTimeInMillis(); int day = (int) Math.ceil(count / 86400000); return day; } public static final Pattern eeDDMMyy = Pattern.compile("^([a-zA-Z]{2})([0-9]{2}[a-zA-Z]{3})([0-9]{2})$"); public static final Pattern eeDDMMM = Pattern.compile("^([a-zA-Z]{2})([0-9]{2}[a-zA-Z]{3})$"); public static final Pattern ddMMM = Pattern.compile("^([0-9]{2})([a-zA-Z]{3})$"); public static final Pattern ddMMMyy = Pattern.compile("^([0-9]{2})([a-zA-Z]{3})([0-9]{2})$"); /** * 解析黑屏PNR返回的日期格式 解析规则：默认使用当前年份，若得到的日期中星期与PNR中星期不对应 则使用下一年和上一年的年份，否则返回null * * @param pnrDateStr * 必须是 Th25OCT 或者Th25OCT13 或者 ddMMM ddMMMyy 格式 * @return 格式不满足条件则返回null */ public static Date parseDateFormPnr(String pnrDateStr) { if (pnrDateStr == null || pnrDateStr.isEmpty()) { return null; } Matcher matchereeDDMMM = eeDDMMM.matcher(pnrDateStr); Matcher matchereeDDMMMyy = eeDDMMyy.matcher(pnrDateStr); Matcher matcherddMMM = ddMMM.matcher(pnrDateStr); Matcher matcherddMMMyy = ddMMMyy.matcher(pnrDateStr); // 匹配EEDDMMM if (matchereeDDMMM.matches()) { String week = matchereeDDMMM.group(1); Calendar calendar = Calendar.getInstance(); String ddmmmyyyyStr = matchereeDDMMM.group(2) + calendar.get(Calendar.YEAR); SimpleDateFormat sdf = new SimpleDateFormat(DDMMMYYYY, Locale.US); Date date; try { date = sdf.parse(ddmmmyyyyStr); } catch (ParseException e) { e.printStackTrace(); return null; } calendar.setTime(date); int calendarWeek = parseDayOfWeek(week); if (calendar.get(Calendar.DAY_OF_WEEK) == calendarWeek) { return date; } else { calendar.add(Calendar.YEAR, 1); if (calendar.get(Calendar.DAY_OF_WEEK) == calendarWeek) { return calendar.getTime(); } else { calendar.add(Calendar.YEAR, -2); if (calendar.get(Calendar.DAY_OF_WEEK) == calendarWeek) { return calendar.getTime(); } else { return null; } } } } // 匹配EEDDMMMyy if (matchereeDDMMMyy.matches()) { String ddmmmyyStr = matchereeDDMMMyy.group(2) + matchereeDDMMMyy.group(3); SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy", Locale.US); Date date; try { date = sdf.parse(ddmmmyyStr); return date; } catch (ParseException e) { e.printStackTrace(); return null; } } // 匹配DDMMM if (matcherddMMM.matches()) { String ddmmmyyStr = pnrDateStr; Calendar c = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat("ddMMM", Locale.US); Date date; try { int year = c.get(Calendar.YEAR); date = sdf.parse(ddmmmyyStr); c.setTime(date); c.set(Calendar.YEAR, year); return c.getTime(); } catch (ParseException e) { e.printStackTrace(); return null; } } // 匹配ddMMMyy if (matcherddMMMyy.matches()) { String ddmmmyyStr = pnrDateStr; SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy", Locale.US); Date date; try { date = sdf.parse(ddmmmyyStr); return date; } catch (ParseException e) { e.printStackTrace(); return null; } } return null; } /** * 转化为 yyyy-MM-dd格式 * * @param pnrDateStr * @return */ public static String formatDateFormPnr(String pnrDateStr) { Date date = parseDateFormPnr(pnrDateStr); if (date != null) { return format(date, "yyyy-MM-dd"); } return null; } /** * 转化为 黑屏返回的HHmm格式航班日期 * * @param pnrTimeStr * 格式：四位 0900 * @return */ public static String formatTimeFormPnr(String pnrTimeStr) { if (pnrTimeStr == null || pnrTimeStr.length() != 4) { return null; } return pnrTimeStr.substring(0, 2) + ":" + pnrTimeStr.substring(2, 4); } /** * 格式化pnr 起飞达到时间 * * @param flightDate * pnr航班日期字符串 * @param time * pnr起飞或到达时间字符串 * @return yyyy-MM-dd HH:ss OR "" */ public static String formatDateTimeFormPnr(String flightDate, String time) { String date = formatDateFormPnr(flightDate); if (!Strings.isNullOrEmpty(date) && time.length() >= 4) { int index = time.indexOf("+1"); if (index >= 0) { time = time.substring(0, index); date = getDateAfter(date, 1); } time = time.substring(0, 2) + ":" + time.substring(2, 4); return date + " " + time; } else { return ""; } } /** * 获取经停分钟数 * * @return */ public static int getStopMins(String arriveTime, String departTime) { if (!Strings.isNullOrEmpty(arriveTime) && arriveTime.length() >= 4 && !Strings.isNullOrEmpty(departTime) && departTime.length() >= 4) { int arriveHour = Integer.parseInt(arriveTime.substring(0, 2)); int arriveMin = Integer.parseInt(arriveTime.substring(2, 4)); int departHour = Integer.parseInt(departTime.substring(0, 2)); int departMin = Integer.parseInt(departTime.substring(2, 4)); return ((departHour - arriveHour) * 60) + (departMin - arriveMin); } return 0; } /** * @Title: getBeforDay @Description: 获取当前时间的前一天 @param @param * date @param @return @return Date @throws */ public static String getBeforOneDay(Date date, String format) { SimpleDateFormat dateFormat = new SimpleDateFormat(format); String dateStr = formatDate(date, format); try { date = dateFormat.parse(dateStr); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.DATE, -1); date = calendar.getTime(); } catch (ParseException e) { e.printStackTrace(); } return dateStr = formatDate(date, format); } /** * 把字符串格式化成日期 * * @param argDateStr * @param argFormat * @return */ public static Date formatStringToDate(String argDateStr, String argFormat) { if (argDateStr == null || argDateStr.trim().length() < 1) { return null; } SimpleDateFormat sdfFormat = null; Date result = null; try { String strFormat = argFormat; if (Strings.isNullOrEmpty(strFormat)) { strFormat = yyyyMMdd; if (argDateStr.length() > 16) { strFormat = YYYYMMDDHHMMSS; } else if (argDateStr.length() > 10) { strFormat = yyyyMMddHHmm; } } sdfFormat = new SimpleDateFormat(strFormat); result = sdfFormat.parse(argDateStr); } catch (Exception e) { result = null; } finally { sdfFormat = null; } return result; } /** * 格式化日期格式 * * @param argDate * @param argFormat * @return 格式化后的日期字符串 */ public static String formatDate(Date argDate, String argFormat) { if (argDate == null) { return ""; } SimpleDateFormat sdfFrom = null; String strResult = null; try { sdfFrom = new SimpleDateFormat(argFormat); strResult = sdfFrom.format(argDate).toString(); } catch (Exception e) { strResult = ""; } finally { sdfFrom = null; } return strResult; } // 获取当天时间的前n天时间 public static Date getBeforDay(Date date, int day) { Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.DAY_OF_MONTH, -day); date = calendar.getTime(); return date; } //两分钟后 public static Long getAfterTwoMinute() { Calendar canlendar = Calendar.getInstance(); // java.util包 Long current = canlendar.getTimeInMillis(); canlendar.add(Calendar.MINUTE, 2); Long after = canlendar.getTimeInMillis(); return after; } public static void main(String[] args) { /* * SimpleDateFormat sdf = new SimpleDateFormat("ddMMM", Locale.US); * System.out.println(sdf.format(new Date()).toUpperCase()); */ /* * System.out.println(parseDateFormPnr("TU23APR")); * System.out.println(parseDateFormPnr("WE23APR14")); * System.out.println(parseDateFormPnr("23APR")); * System.out.println(parseDateFormPnr("23APR13")); */ // System.out.println(getBeforDay(new Date(),"yyyy-MM-dd")); // System.out.println( getBeforOneDay( new Date(), "yyyy-MM-dd" ) );// SimpleDateFormat fomat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss ms");// System.out.println(fomat.format(getToday())); System.out.println(DateUtil.stringtoDate("1445839889")); } /** * 计算并格式化消耗时间 * generate by: vakin jiang at 2012-2-16 * * @param startPoint * @return */ public static String formatTimeConsumingInfo(long startPoint) { StringBuffer buff = new StringBuffer(); long totalMilTimes = System.currentTimeMillis() - startPoint; int mi = (int) Math.floor(totalMilTimes / 60000); int se = (int) Math.floor((totalMilTimes - 60000 * mi) / 1000); if (mi > 0) buff.append(mi).append("mins "); buff.append(se).append("s"); return buff.toString(); } /** * 得到當前日期的前一个月 * * @return */ public static String getLastMonth() { Calendar c = Calendar.getInstance(); c.add(Calendar.MONTH, -1); SimpleDateFormat format = new SimpleDateFormat("yyyyMM"); String time = format.format(c.getTime()); return time; }}