dateconverter.java

java阿里巴巴代码

/**
 * DateConverter.java
 * @version 1.0.1
 */

package tools.util;

import java.text.SimpleDateFormat;
import java.util.Calendar;


public class DateConverter
{
	/**
	 * Define SimpleDateFormat variable to return the formatted string according to it
	 */
	static public SimpleDateFormat MM_dd_yy = new SimpleDateFormat("MM-dd-yy");
	static public SimpleDateFormat h_mm_a = new SimpleDateFormat("h:mm a");
	static public SimpleDateFormat MM_DD_YYYY_HH_MM_SS = new SimpleDateFormat("MM_dd_yyyy_hh_mm_ss");
	static public SimpleDateFormat MMddyyyy = new SimpleDateFormat("MM/dd/yyyy");
	static public SimpleDateFormat MM_DD_YY = new SimpleDateFormat("MM_dd_yy");
	static public SimpleDateFormat MMddyy = new SimpleDateFormat("MM/dd/yy");
	static public SimpleDateFormat HHmmss = new SimpleDateFormat("HH:mm:ss");
	static public SimpleDateFormat HHmm = new SimpleDateFormat("HH:mm");
	static public SimpleDateFormat MMdotDDdotYYYY = new SimpleDateFormat("MM.dd.yyyy");
	static public SimpleDateFormat MMddYYYY_HHmmss = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
	static public SimpleDateFormat YYYYMMdd_HHmmss = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
	static public SimpleDateFormat YYYYMMdd = new SimpleDateFormat("yyyy.MM.dd");
	static public SimpleDateFormat YYYY_MM_dd = new SimpleDateFormat("yyyy-MM-dd");


	static String[] months = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; 
	static public String getSimpleMonthName(int month)
	{
		return months[month];
	}


	static public String get_MM_dd_yy(java.util.Date date)
	{
		if(date == null) return "null";
		return MM_dd_yy.format(date);
	}


	static public String get_h_mm_a(java.util.Date date)
	{
		if(date == null) return "null";
		return h_mm_a.format(date);
	}
	

	static public String get_MM_DD_YYYY_HH_MM_SS(java.util.Date date)
	{
		if(date==null) return "null";
		return MM_DD_YYYY_HH_MM_SS.format(date);
	}


	static public String get_MMddyyyy(java.util.Date date)
	{
		if(date==null) return "null";
		return MMddyyyy.format(date);
	}
	static public java.util.Date parse_MM_DD_YYYY(String strDate)
	{
		if(strDate==null) return null;
		
		try{
			return MMddyyyy.parse(strDate);
		}catch(java.text.ParseException pe){
			return null;
		}
	}



	static public String get_MM_DD_YY(java.util.Date date)
	{
		if(date==null) return "null";
		return MM_DD_YY.format(date);
	}
	

	

	static public String get_MMddyy(java.util.Date date)
	{
		if(date==null) return "null";
		return MMddyy.format(date);
	}
	

	static public String get_YYYYMMdd(java.util.Date date)
	{
		if(date==null) return "null";
		return YYYYMMdd.format(date);
	}

	static public String get_YYYY_MM_dd(java.util.Date date)
	{
		if(date==null)
			return "N/A";
		return YYYY_MM_dd.format(date);
	}


	static public String get_YYYYMMdd_HHmmss(java.util.Date date)
	{
		if(date==null) return "null";
		return YYYYMMdd_HHmmss.format(date);
	}
	

	static public String get_MMddYYYY_HHmmss(java.util.Date date)
	{
		if(date==null) return "NULL";
		return MMddYYYY_HHmmss.format(date);
	}


	static public String get_MMdotDDdotYYYY(java.util.Date date)
	{
		if(date==null) return "NULL";
		return MMdotDDdotYYYY.format(date);
	}


	static public String get_HHmmss(java.util.Date date)
	{
		if(date==null) return "null";
		return HHmmss.format(date);
	}
	

	static public String get_HHmm(java.util.Date date)
	{
		if(date==null) return "null";
		return HHmm.format(date);
	}


	static public java.util.Date getPrevMonthDate(java.util.Date date, int nMonth)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int month = nMonth * (-1);
		cal.add(Calendar.MONTH, month);
		return cal.getTime();
	}	


	static public java.util.Date getNextMonthDate(java.util.Date date, int nMonth)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.MONTH, nMonth);
		return cal.getTime();
	}	


	static public java.util.Date getPrevDay(java.util.Date date)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.DATE, -1);
		return cal.getTime();
	}
	static public java.util.Date getNextDay(java.util.Date date)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.DATE, 1);
		return cal.getTime();
	}


	static public java.util.Date getNextDays(java.util.Date date, int nDates)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.DATE, nDates);
		return cal.getTime();
	}



	static public java.util.Date getMidnight(java.util.Date date)
	{
		Calendar cal = Calendar.getInstance();
		
		cal.setTime(date);
		cal.set(Calendar.HOUR_OF_DAY, 0);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);
		
		return cal.getTime();
	}
	
	static public java.util.Date getNextHour(java.util.Date date, int nHour)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.HOUR_OF_DAY, nHour);
		return cal.getTime();
	}

	static public java.util.Date getNext15Min(java.util.Date date, int n15Min)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.MINUTE, n15Min*15);
		return cal.getTime();
	}

	static public java.util.Date getNext5Min(java.util.Date date, int n5Min)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.MINUTE, n5Min*5);
		return cal.getTime();
	}

	static public java.util.Date getNextSecond(java.util.Date date, int nSecond)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.SECOND, nSecond);
		return cal.getTime();
	}

	static public int getHourOfDay(java.util.Date date)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		return cal.get(Calendar.HOUR_OF_DAY);
	}

	static public int get15MinOfDay(java.util.Date date)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int hours	= cal.get(Calendar.HOUR_OF_DAY);
		int mins	= cal.get(Calendar.MINUTE);
		return (hours*4 + mins/15);
	}

	static public int get5MinOfDay(java.util.Date date)
	{
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int hours	= cal.get(Calendar.HOUR_OF_DAY);
		int mins	= cal.get(Calendar.MINUTE);
		return (hours*12 + mins/5);
	}

	/**
	 * months between oldDate & curDate
	 * oldDate: 06/25/00
	 *			curDate: 07/24/00<1> 07/25/00<2>; 07/26/00<2>
	 * oldDate: 12/25/99
	 *			curDate: 01/24/00<1> 01/25/00<2>; 01/26/00<2>
	 */
	static public int getMonths(java.util.Date curDate, java.util.Date oldDate)
	{
		Calendar cur = Calendar.getInstance();
		cur.setTime(curDate);
		Calendar old = Calendar.getInstance();
		old.setTime(oldDate);
		
		if(cur.before(old)) return 0;
		
		boolean done = false;
		int counter = 0;
		while(true)
		{
			if(old.after(cur)) return counter;
			old.add(Calendar.MONTH, 1);
			counter++;
		}
	}
	/**
	 * months between oldDate & curDate
	 * oldDate: 06/25/00
	 *			curDate: 6/26/00<1> 7/1/00<6>
	 */
	static public int getDays(java.util.Date curDate, java.util.Date oldDate)
	{
		Calendar cur = Calendar.getInstance();
		cur.setTime(curDate);
		Calendar old = Calendar.getInstance();
		old.setTime(oldDate);
		
		if(cur.before(old)) return 0;
		
		boolean done = false;
		int counter = 0;
		while(true)
		{
			if(old.after(cur) || old.equals(cur)) return counter;
			old.add(Calendar.DATE, 1);
			counter++;
		}
	}

	/**
	 * weekNum: 1-Monday ... 7-Sunday
	 * relative to today (passed)
	 */
	static public java.util.Date getLastWeekDate(int weekNum, java.util.Date today)
	{
		// WeekNum : 1-Monday ... 7-Sunday
		Calendar calendar=Calendar.getInstance();
		calendar.setTime(today);
		calendar.add(Calendar.DATE,-7-(calendar.get(Calendar.DAY_OF_WEEK)-2)+(weekNum-1));
		return calendar.getTime();
	}	

	/**
	 * compare if two dates are the same day
	 */
	static public boolean isDateEqualToDay(java.util.Date date1, java.util.Date date2)
	{
		Calendar calendar1=Calendar.getInstance();
		calendar1.setTime(date1);
		Calendar calendar2=Calendar.getInstance();
		calendar2.setTime(date2);
		if(calendar1.get(Calendar.YEAR)==calendar2.get(Calendar.YEAR) &&
		   calendar1.get(Calendar.MONTH)==calendar2.get(Calendar.MONTH) &&
		   calendar1.get(Calendar.DATE)==calendar2.get(Calendar.DATE))
			return true;
		return false;
	}

	/**
	 * check if date is week day
	 */
	static public boolean isWeekDay(java.util.Date date)
	{
		Calendar calendar=Calendar.getInstance();
		calendar.setTime(date);
		int day = calendar.get(Calendar.DAY_OF_WEEK);
		if(day==Calendar.SATURDAY || day==Calendar.SUNDAY)
			return false;
		return true;
	}

	/**
	 * getDateByNumeric
	 */
	static public java.util.Date getDateByNumeric(long milliseconds)
	{
		return new java.util.Date(milliseconds);
	}
	
	/**
	 * getNumericByDate
	 */
	static public long getNumericByDate(java.util.Date date)
	{
		return date.getTime();
	}
	
	/**
	 * weekNum: 1-Monday ... 7-Sunday
	 * relative to today (passed)
	 */
	static public java.util.Date getEndDayOfTheMonth(java.util.Date today)
	{
		Calendar calendar=Calendar.getInstance();
		calendar.setTime(today);
		calendar.add(Calendar.MONTH, 1);
		calendar.set(Calendar.DATE, 1);
		calendar.add(Calendar.DATE, -1);
		return calendar.getTime();
	}

}