Java常用的时间相关转化有哪些

public static final long DAYTIMESTAMP = 24 * 60 * 60 * 1000L;
public static final  String SHORTDATEFORMATER = "yyyy-MM-dd";
public static final  String LONGDATEFORMATER = "yyyy-MM-dd HH:mm:ss";

public static final String convertDateToString(String datePattern, Date date) {
		String returnValue = null;
		if (date != null) {
			SimpleDateFormat df = new SimpleDateFormat(datePattern);
			returnValue = df.format(date);
		}
		return (returnValue);
	}

public static final Date convertStringToDate(String datePattern,String dateStr) {
		if( StringUtils.isBlank(dateStr) ){
			return null;
		}
		SimpleDateFormat df = null;
		Date date = null;
		df = new SimpleDateFormat(datePattern);
		try {
			date = df.parse(dateStr);
		} catch (ParseException pe) {
			log.error("异常![{}]",pe);
			return null;
		}
		return (date);
	}

public static final boolean isNonExpired(Date date){
		Calendar calendarNow = Calendar.getInstance();
		calendarNow.setTime(calendarNow.getTime());
		Calendar calendarGiven = Calendar.getInstance();
		calendarGiven.setTime(date);
		return calendarNow.before(calendarGiven);
	}

public static final boolean isExpired(Date date){
		Calendar calendarNow = Calendar.getInstance();
		calendarNow.setTime(calendarNow.getTime());
		Calendar calendarGiven = Calendar.getInstance();
		calendarGiven.setTime(date);
		return calendarNow.after(calendarGiven);
	}

public static final int compare( Date firstDate,Date secondDate ){
		return firstDate.compareTo(secondDate);
	}

public static Date DateMinus(Date date,int month){
		  Calendar calendar = Calendar.getInstance();
		  calendar.setTime(date);
		  calendar.add(Calendar.MONTH, -month);
		return calendar.getTime();
	}

public static String getDaysBefore(Date date, int days) {
		Date td = new Date(date.getTime() - DAYTIMESTAMP * days);
		return DateUtils.convertDateToString(SHORTDATEFORMATER, td);
	}

public static List<String> getDaysBeforeArray(Date date, int days){
		List<String> resultList = new ArrayList<>();
		for (int i = days-1; i >= 0; i--) {
			resultList.add(getDaysBefore(date, i));
		}
		return resultList;
	}

public static Date getDayStartTimeByDate(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();
	}

public static Date getDayEndOfDay(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 Date getDayBeforeHour(){
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.HOUR_OF_DAY,calendar.get(Calendar.HOUR_OF_DAY)-1);
		return calendar.getTime();
	}

public static String getdifferMinute(Date endDate, Date nowDate){
		long nm = 1000 * 60;
		// 获得两个时间的毫秒时间差异
		long diff = endDate.getTime() - nowDate.getTime();
		return String.valueOf(diff/nm);
	}

public static int differentDaysByMillisecond(Date date1,Date date2){
		return (int) ((date2.getTime() - date1.getTime()) / (1000*3600*24));
	}

public static List<Date> getDatesBetweenTwoDate(Date beginDate, Date endDate ) {
        List<Date> dates = new ArrayList<>();
        try{
            dates.add(beginDate);// 把开始时间加入集合
            Calendar cal = Calendar.getInstance();
            // 使用给定的 Date 设置此 Calendar 的时间
            cal.setTime(beginDate);
            while (true) {
                // 根据日历的规则，为给定的日历字段添加或减去指定的时间量
                cal.add(Calendar.DAY_OF_MONTH, 1);
                // 测试此日期是否在指定日期之后
                if (endDate.after(cal.getTime())) {
                    dates.add(cal.getTime());
                } else {
                    break;
                }
            }
            dates.add(endDate);// 把结束时间加入集合
        }catch(Exception e){
            log.error("获取时间集合异常");
        }

        return dates;
    }

public static String getMonthFirstDay() {
		SimpleDateFormat format = new SimpleDateFormat(SHORTDATEFORMATER);
		Calendar c = Calendar.getInstance();
		c.add(Calendar.MONTH, 0);
		c.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天
		return format.format(c.getTime());
	}

public static String parseDate(Long timeStamp){
		String resDate = "";
		if(null != timeStamp){
			Date date = new Date(timeStamp);
			SimpleDateFormat smf = new SimpleDateFormat(LONGDATEFORMATER);
			resDate= smf.format(date);
		}
		return resDate;
	}

public static int getWeekOfYear(String dateStr,int startCalendar){
        SimpleDateFormat format = new SimpleDateFormat(SHORTDATEFORMATER);
        Calendar calendar = Calendar.getInstance();
        try {
            Date date = format.parse(dateStr);
            calendar.setFirstDayOfWeek(startCalendar);
            calendar.setTime(date);
        }
        catch (Exception error) {
            error.printStackTrace();
        }
        return calendar.get(Calendar.WEEK_OF_YEAR);
    }