Java Date query: Quarterly, month, week, etc time information

Package com.stt.dateChange;
Import Java.text.SimpleDateFormat;
Import Java.util.Calendar;

Import Java.util.Date;
Import Org.apache.commons.logging.Log;

Import Org.apache.commons.logging.LogFactory; /** * * @author zengms * @date 2012-12-27 * */public class Dateutils {private static final Log logger = logfact

	Ory.getlog (Dateutils.class);

	public static final String YYYYMMDD = "YYYY-MM-DD";

	public static final String Yyyymmdd_zh = "yyyy year mm month DD Day"; public static final int first_day_of_week = Calendar.monday; China Monday is the first day of the week/** * * @param strdate * @return/public static Date parsedate (String strdate) {return par
	Sedate (strdate, NULL); /** * parsedate * * * @param strdate * @param pattern * @return/public static Date parsedate (String str
		Date, String pattern) {Date date = null;
			try {if (pattern = = NULL) {pattern = YYYYMMDD;
			SimpleDateFormat format = new SimpleDateFormat (pattern);
		Date = Format.parse (strdate); } CAtch (Exception e) {logger.error ("Parsedate error:" + E);
	} return date; /** * Format Date * * @param date * @return/public static String formatdate (date date) {return forma
	Tdate (date, null); /** * Format Date * * @param date * @param pattern * @return/public static String formatdate (Date dat
		E, String pattern) {string strdate = null;
			try {if (pattern = = NULL) {pattern = YYYYMMDD;
			SimpleDateFormat format = new SimpleDateFormat (pattern);
		Strdate = Format.format (date);
		catch (Exception e) {logger.error ("FormatDate error:", e);
	return strdate; /** * Acquisition Date: Year * * @param date * @return/public static int getyear (date date) {Calendar c = calendar.g
		Etinstance ();
		C.settime (date);
		int year = C.get (calendar.year);
	return to year; /** * Acquisition Date: Year * * @param date * @return/public static int getmonth (date date) {Calendar c = Calendar.
		GetInstance (); C.settime (date);
		int month = C.get (calendar.month);
	Return month + 1; /** * Acquisition Date: Year * * @param date * @return/public static int getday (date date) {Calendar c = calendar.ge
		Tinstance ();
		C.settime (date);
		int da = c.get (calendar.day_of_month);
	Return da; /** * The date of the day is week * * @param date * @return/public static int Getweekday (date date) {Calendar c = Cale
		Ndar.getinstance ();
		C.settime (date);
		int week_of_year = C.get (Calendar.day_of_week);
	return week_of_year-1; /** * Obtained the first weeks of the year * * @param date * @return/public static int getweekofyear (date date) {Calendar c = Ca
		Lendar.getinstance ();
		C.settime (date);
		int week_of_year = C.get (calendar.week_of_year);
	return week_of_year; /** * getweekbeginandenddate * * @param date * @param pattern * @return/public static String getweekb
		Eginandenddate (date date, String pattern) {Date Monday = Getmondayofweek (date);
		Date Sunday = Getsundayofweek (date); return foRmatdate (Monday, pattern) + "-" + formatdate (Sunday, pattern); /** * Date * @param date * @return/public static date Getmondayofweek of the week-week 1st * * * * on the basis of dates {Calenda
		R Monday = Calendar.getinstance ();
		Monday.settime (date);
		Monday.setfirstdayofweek (First_day_of_week);
		Monday.set (Calendar.day_of_week, calendar.monday);
	return Monday.gettime (); /** * Date * @param date * @return/public static date (date Getsundayofweek) {Calenda
		R Sunday = Calendar.getinstance ();
		Sunday.settime (date);
		Sunday.setfirstdayofweek (First_day_of_week);
		Sunday.set (Calendar.day_of_week, calendar.sunday);
	return Sunday.gettime (); /** * The remaining days of the month * * @param date * @return/public static int getremaindayofmonth (date date) {int dayof
		Month = GetDayOfMonth (date);
		int day = Getpassdayofmonth (date);
	return dayofmonth-day; /** * The number of days in which the month has elapsed * * @param date * @return/public static int Getpassdayofmonth(Date date)
		{Calendar c = calendar.getinstance ();
		C.settime (date);
	Return C.get (Calendar.day_of_month); /** * Number of months * * @param date * @return/public static int GetDayOfMonth (date date) {Calendar c = Calen
		Dar.getinstance ();
		C.settime (date);
	Return C.getactualmaximum (Calendar.day_of_month);  /** * The first day of the month * * @param date * @return/public static date Getfirstdateofmonth (date date) {Calendar C
		= Calendar.getinstance ();
		C.settime (date);
		C.set (Calendar.day_of_month, C.getactualminimum (Calendar.day_of_month));
	return C.gettime ();  /** * The last day of the month * * @param date * @return/public static date Getlastdateofmonth (date date) {Calendar C
		= Calendar.getinstance ();
		C.settime (date);
		C.set (Calendar.day_of_month, C.getactualmaximum (Calendar.day_of_month));
	return C.gettime (); /** * made the first day of the quarter * * @param date * @return/public static date Getfirstdateofseason (date date) {return g Etfirstdateofmonth (GETseasondate (date) [0]); /** * Get Quarterly Last day * * @param date * @return/public static date Getlastdateofseason (date date) {return g
	Etlastdateofmonth (getseasondate (date) [2]);
		/** * Get Quarterly days * * @param date * @return/public static int Getdayofseason (date date) {int day = 0;
		date[] Seasondates = getseasondate (date);
		for (Date date2:seasondates) {Day + = GetDayOfMonth (date2);
	Return day; /** * Get Quarterly remaining days * * @param date * @return/public static int Getremaindayofseason (date date) {return g
	Etdayofseason (date)-Getpassdayofseason (date); /** * Obtained quarterly past days * * @param date * @return/public static int Getpassdayofseason (date date) {int day =

		0;

		date[] Seasondates = getseasondate (date);
		Calendar C = calendar.getinstance ();
		C.settime (date);

		int month = C.get (calendar.month); if (month = = Calendar.january | | month = = Calendar.april | | month = = Calendar.july | | month = calendar.october) {//Quarter first Month day = Getpassdayofmonth (Seasondates[0]); else if (month = Calendar.february | | month = Calendar.may | | month = Calendar.august | | month = CALENDAR.NOVEMB
		ER) {//quarterly second Month day = GetDayOfMonth (Seasondates[0]) + getpassdayofmonth (seasondates[1]); else if (month = Calendar.march | | month = Calendar.june | | month = Calendar.september | | month = CALENDAR.DECEM BER) {//quarterly third Month day = GetDayOfMonth (Seasondates[0]) + getdayofmonth (seasondates[1]) + getpassdayofmonth (seasondate
		S[2]);
	Return day;  /** * Obtained quarterly month * * @param date * @return/public static date[] Getseasondate (date date) {date[] season =

		New Date[3];
		Calendar C = calendar.getinstance ();

		C.settime (date);
		int Nseason = Getseason (date);
			if (Nseason = = 1) {//First quarter C.set (Calendar.month, calendar.january);
			Season[0] = C.gettime ();
			C.set (Calendar.month, calendar.february);
			SEASON[1] = C.gettime ();
			C.set (Calendar.month, Calendar.march); SEASON[2] = C.gettime ();
			else if (Nseason = 2) {//second quarter C.set (Calendar.month, Calendar.april);
			Season[0] = C.gettime ();
			C.set (Calendar.month, Calendar.may);
			SEASON[1] = C.gettime ();
			C.set (Calendar.month, Calendar.june);
		SEASON[2] = C.gettime ();
			else if (Nseason = 3) {//third quarter c.set (Calendar.month, calendar.july);
			Season[0] = C.gettime ();
			C.set (Calendar.month, calendar.august);
			SEASON[1] = C.gettime ();
			C.set (Calendar.month, Calendar.september);
		SEASON[2] = C.gettime ();
			else if (Nseason = 4) {//Fourth quarter C.set (Calendar.month, Calendar.october);
			Season[0] = C.gettime ();
			C.set (Calendar.month, Calendar.november);
			SEASON[1] = C.gettime ();
			C.set (Calendar.month, Calendar.december);
		SEASON[2] = C.gettime ();
	Return season;  /** * * 1 First quarter 2 second quarter 3 third quarter 4 quarter * * @param date * @return/public static int Getseason (date date)

		{int season = 0;
		Calendar C = calendar.getinstance ();
		C.settime (date); Int month= C.get (Calendar.month);
			Switch (month) {case Calendar.JANUARY:case Calendar.FEBRUARY:case Calendar.MARCH:season = 1;
		Break
			Case Calendar.APRIL:case Calendar.MAY:case Calendar.JUNE:season = 2;
		Break
			Case Calendar.JULY:case Calendar.AUGUST:case Calendar.SEPTEMBER:season = 3;
		Break
			Case Calendar.OCTOBER:case Calendar.NOVEMBER:case Calendar.DECEMBER:season = 4;
		Break
		Default:break;
	Return season;

		public static void Main (string[] args) {String strdate = ' 2013-01-01 ';

		Date date = Parsedate (strdate); System.out.println (strdate + "What year is it today?")
		"+ getyear (date)); System.out.println (strdate + "What month is it today?")
		"+ getmonth (date)); System.out.println (Strdate + "today is the date.)
		"+ getday (date)); System.out.println (Strdate + "Today is the week.")
		"+ getweekday (date)); System.out.println (Strdate + "is the first few weeks of the year.)
		"+ getweekofyear (date)); System.out.println (Strdate +) the start of the week from the end date.
		"+ getweekbeginandenddate (date," yyyy mm month DD day ")); SYstem.out.println (Strdate + "in the Week Monday" is.
		"+ FormatDate (Getmondayofweek (date));" System.out.println (Strdate + "in the Week Sunday" is.

		"+ FormatDate (Getsundayofweek (date));" System.out.println (strdate + "first day of the month" date.
		"+ FormatDate (getfirstdateofmonth (date));" System.out.println (strdate + "The date of the last day of the month."
		"+ FormatDate (getlastdateofmonth (date));" System.out.println (strdate + "Days of the month.")
		"+ getdayofmonth (date)); System.out.println (strdate + ") How many days have passed in the month.
		"+ getpassdayofmonth (date)); System.out.println (strdate + "The number of days remaining in the month."

		"+ getremaindayofmonth (date)); System.out.println (Strdate +) The first day of the quarter.
		"+ FormatDate (Getfirstdateofseason (date));" System.out.println (strdate + "The date of the last day of the quarter."
		"+ FormatDate (Getlastdateofseason (date));" System.out.println (strdate +) The number of days of the quarter.
		"+ Getdayofseason (date)); System.out.println (Strdate + ") The number of days after the quarter.
		"+ Getpassdayofseason (date)); System.out. println (strdate +) The number of days remaining in the quarter.
		"+ Getremaindayofseason (date)); System.out.println (Strdate + "is the first quarter.") "+ Getseason (date)); System.out.println (strdate +) quarter month.
				"+ FormatDate (getseasondate (date) [0]," yyyy mm month ") +"/"+ FormatDate (getseasondate (date) [1]," yyyy year mm month ") +"/"
	+ FormatDate (getseasondate (date) [2], "yyyy mm month")); }
}