package com.wonhero.utils.util;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.HashMap;import java.util.Map;public class DateUtil { private static DateFormat dateFormat = new SimpleDateFormat("yyyyMMddhhmmss"); public static final String LAST_TIME = "2038-01-01 00:00:00"; private static Map formats = new HashMap(); public static final String DATE_FORMATE_STRING_DEFAULT = "yyyyMMddHHmmss"; public static final String DATE_FORMATE_STRING_A = "yyyy-MM-dd HH:mm:ss"; public static final String DATE_FORMATE_STRING_B = "yyyy-MM-dd"; public static final String DATE_FORMATE_STRING_C = "MM/dd/yyyy HH:mm:ss a"; public static final String DATE_FORMATE_STRING_D = "yyyy-MM-dd HH:mm:ss a"; public static final String DATE_FORMATE_STRING_E = "yyyy-MM-dd'T'HH:mm:ss'Z'"; public static final String DATE_FORMATE_STRING_F = "yyyy-MM-dd'T'HH:mm:ssZ"; public static final String DATE_FORMATE_STRING_G = "yyyy-MM-dd'T'HH:mm:ssz"; public static final String DATE_FORMATE_STRING_H = "yyyyMMdd"; public static final String DATE_FORMATE_STRING_I = "yyyy-MM-dd HH:mm:ss.SSS"; public static final String DATE_FORMATE_STRING_J = "yyyyMMddHHmmss.SSS"; public static final String DATE_FORMATE_STRING_K = "yyyyMMddHHmmssSSS"; public static final String DATE_FORMATE_STRING_L = "MMdd"; static { formats.put("yyyyMMddHHmmss", new SimpleDateFormat("yyyyMMddHHmmss")); formats.put("yyyy-MM-dd HH:mm:ss", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")); formats.put("yyyy-MM-dd", new SimpleDateFormat("yyyy-MM-dd")); formats.put("MM/dd/yyyy HH:mm:ss a", new SimpleDateFormat("MM/dd/yyyy HH:mm:ss a")); formats.put("yyyy-MM-dd HH:mm:ss a", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss a")); formats.put("yyyy-MM-dd'T'HH:mm:ss'Z'", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'")); formats.put("yyyy-MM-dd'T'HH:mm:ssZ", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")); formats.put("yyyy-MM-dd'T'HH:mm:ssz", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz")); formats.put("yyyyMMdd", new SimpleDateFormat("yyyyMMdd")); formats.put("yyyy-MM-dd HH:mm:ss.SSS", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS")); formats.put("yyyyMMddHHmmss.SSS", new SimpleDateFormat("yyyyMMddHHmmss.SSS")); formats.put("yyyyMMddHHmmssSSS", new SimpleDateFormat("yyyyMMddHHmmssSSS")); formats.put("MMdd", new SimpleDateFormat("MMdd")); } /** * 返回 yyyyMMddhhmmss 格式的日期串 * * @return */ public static String getyyyyMMddhhmmssDateString() { return dateFormat.format(new Date()); } /** * 获取当前时间 * * @return */ public static Date getCurrentDate() { Calendar calendar = Calendar.getInstance(); return calendar.getTime(); } /** * 获取当前月 * * @return */ public static int getCurrentMonth() { Calendar calendar = Calendar.getInstance(); return calendar.get(Calendar.MONTH) + 1; } public static Date getLastDate() throws ParseException { return getDateFromString("2037-12-01", DATE_FORMATE_STRING_B); } /** * 转TimeStamp * * @param date * @return */ public static Timestamp getTimestamp(Date date) { Timestamp timestamp = new Timestamp(date.getTime()); return timestamp; } /** * 获取未来时间 * * @param second 秒 * @return */ public static Date getFutureDate(int second) { Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.SECOND, second); return calendar.getTime(); } public static String getFormatTimeString(Date date, String pattern) { SimpleDateFormat sDateFormat = getDateFormat(pattern); synchronized (sDateFormat) { return sDateFormat.format(date); } } public static String getDefaultFormateTimeString(Date date) { return getFormatTimeString(date, "yyyyMMddHHmmss"); } public static SimpleDateFormat getDateFormat(String pattern) { SimpleDateFormat sDateFormat = (SimpleDateFormat) formats.get(pattern); if (sDateFormat == null) { sDateFormat = new SimpleDateFormat(pattern); formats.put(pattern, sDateFormat); } return sDateFormat; } public static Date getDateFromString(String date, String pattern) throws ParseException { SimpleDateFormat sDateFormat = getDateFormat(pattern); synchronized (sDateFormat) { return sDateFormat.parse(date); } } public static Date getDefaultDateFromString(String date) throws ParseException { return getDateFromString(date, "yyyyMMddHHmmss"); } public static String getNowDefault() { return getNow("yyyyMMddHHmmss"); } public static String getNow(String pattern) { return getFormatTimeString(new Date(), pattern); } public static String getLastTime() { return LAST_TIME; } public static String getNowII() { return getFormatTimeString(new Date(), "yyyyMMdd"); } public static long dateString2Long(String str, String pattern) throws ParseException { return getDateFromString(str, pattern).getTime(); } /** * 校验字符串是否可以格式化为时间 * * @param str * @param pattern * @return */ public static boolean judgeDate(String str, String pattern) { try { dateString2Long(str, pattern); } catch (Exception e) { return false; } return true; } public static String longToDateStringDefault(long time) { return getFormatTimeString(new Date(time), "yyyyMMddHHmmss"); } public static String longToDateString(long time, String pattern) { return getFormatTimeString(new Date(time), pattern); } public static long date2Long(Date date) { return date.getTime(); } public static Date longToDate(long time) { return new Date(time); } public static Date getDateFromStringAdaptTwoPattern(String date) throws ParseException { try { return getDateFromString(date, "yyyy-MM-dd HH:mm:ss"); } catch (ParseException e) { } return getDateFromString(date, "yyyy-MM-dd"); } public static String changeNumDateToDate(String numdate, String inFormat, String outFormat) throws ParseException { Date date = getDateFromString(numdate, inFormat); return getFormatTimeString(date, outFormat); } public static String getNextMonthFistDay(String nowdate, String inFormat, String outFormat) throws ParseException { Date date = getDateFromString(nowdate, inFormat); Calendar cl = Calendar.getInstance(); cl.setTime(date); cl.set(2, cl.get(2) + 1); cl.set(5, 1); date = cl.getTime(); return getFormatTimeString(date, outFormat); } public static boolean isLeapYear(int year) { if (year % 400 == 0) return true; if (year % 4 == 0) { return (year % 100 != 0); } return false; } public static String getLastDay(String nowdate, String inFormat, String outFormat) throws ParseException { String returndate = ""; Date date = getDateFromString(nowdate, inFormat); Calendar cl = Calendar.getInstance(); cl.setTime(date); switch (cl.get(2)) { case 0: cl.set(5, 31); break; case 1: int year = cl.get(1); if (isLeapYear(year)) cl.set(5, 29); else { cl.set(5, 28); } break; case 2: cl.set(5, 31); break; case 3: cl.set(5, 30); break; case 4: cl.set(5, 31); break; case 5: cl.set(5, 30); break; case 6: cl.set(5, 31); break; case 7: cl.set(5, 31); break; case 8: cl.set(5, 30); break; case 9: cl.set(5, 31); break; case 10: cl.set(5, 30); break; case 11: cl.set(5, 31); } date = cl.getTime(); returndate = getFormatTimeString(date, outFormat); return returndate; } public static String getMonthLastDay(String fmt) { String returndate = ""; Date date = null; Calendar cl = Calendar.getInstance(); switch (cl.get(2)) { case 0: cl.set(5, 31); break; case 1: int year = cl.get(1); if (isLeapYear(year)) cl.set(5, 29); else { cl.set(5, 28); } break; case 2: cl.set(5, 31); break; case 3: cl.set(5, 30); break; case 4: cl.set(5, 31); break; case 5: cl.set(5, 30); break; case 6: cl.set(5, 31); break; case 7: cl.set(5, 31); break; case 8: cl.set(5, 30); break; case 9: cl.set(5, 31); break; case 10: cl.set(5, 30); break; case 11: cl.set(5, 31); } date = cl.getTime(); returndate = getFormatTimeString(date, fmt); return returndate; } public static Date getNextMonthFirstDate() { Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.DAY_OF_MONTH, 1); calendar.add(Calendar.MONTH, 1); return calendar.getTime(); } public static Date getFirstDate() { Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.DAY_OF_MONTH, 1); return calendar.getTime(); } public static String getNextMonthFirstDay(String fmt) { String returndate = ""; Date date = getNextMonthFirstDate(); returndate = getFormatTimeString(date, fmt); return returndate; } public static boolean compareDate(String fistDate, String secondDate, String format) throws ParseException { boolean flag = false; Date fist = null; Date second = null; fist = getDateFromString(fistDate, format); second = getDateFromString(secondDate, format); if (fist.before(second)) { flag = true; } return flag; } public static boolean isRightDate(String value, String varValue) { try { SimpleDateFormat format = new SimpleDateFormat(varValue); format.setLenient(false); format.parse(value); } catch (ParseException e) { return false; } return true; } public static int getCurrentMonthDay() { Calendar a = Calendar.getInstance(); a.set(Calendar.DATE, 1); a.roll(Calendar.DATE, -1); int maxDate = a.get(Calendar.DATE); return maxDate; } /** * 在给定的日期加上或减去指定月份后的日期 * * @param sourceDate 原始时间 * @param month 要调整的月份，向前为负数，向后为正数 * @return */ public static Date stepMonth(Date sourceDate, int month) { Calendar c = Calendar.getInstance(); c.setTime(sourceDate); c.add(Calendar.MONTH, month); return c.getTime(); } public static String dateTimeToDate(String dateTime) { String dateStr = ""; try { Date date = getDateFromString(dateTime, DATE_FORMATE_STRING_A); dateStr = getFormatTimeString(date, DATE_FORMATE_STRING_B); } catch (ParseException e) { dateStr = dateTime; } return dateStr; } public static int getYear() { Date date = getCurrentDate(); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); return calendar.get(Calendar.YEAR); } public static int getMonth() { Date date = getCurrentDate(); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); return calendar.get(Calendar.MONTH) + 1; } /** * 判断时间是否在时间段内 * * @param nowTime * @param beginTime * @param endTime * @return */ public static boolean belongCalendar(Date nowTime, Date beginTime, Date endTime) { Calendar date = Calendar.getInstance(); date.setTime(nowTime); Calendar begin = Calendar.getInstance(); begin.setTime(beginTime); Calendar end = Calendar.getInstance(); end.setTime(endTime); if (date.after(begin) && date.before(end)) { return true; } else if (nowTime.compareTo(beginTime) == 0 || nowTime.compareTo(endTime) == 0) { return true; } else { return false; } } //获取两个日期之间的天数 public static int daysBetween(Date now, Date returnDate) { Calendar cNow = Calendar.getInstance(); Calendar cReturnDate = Calendar.getInstance(); cNow.setTime(now); cReturnDate.setTime(returnDate); setTimeToMidnight(cNow); setTimeToMidnight(cReturnDate); long todayMs = cNow.getTimeInMillis(); long returnMs = cReturnDate.getTimeInMillis(); long intervalMs = todayMs - returnMs; return millisecondsToDays(intervalMs); } //获取两个日期之间的毫秒数 private static void setTimeToMidnight(Calendar calendar) { calendar.set(Calendar.HOUR_OF_DAY, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.SECOND, 0); } //获取两个日期之间的分钟数 private static int millisecondsToDays(long intervalMs) { return (int) (intervalMs / (1000 * 86400)); }}
Java 时间日期字符串获取处理工具类
本文主要介绍Java中，获取指定格式时间日期字符串，时间日期字符串处理转换及判断等工具类。