java.time.LocalDate#getDayOfMonth ( )源码实例Demo

/**
 * @return the start of last month at 0am in the current timezone
 */
public static Date getStartOfLastMonth() {
	LocalDate now = LocalDate.now();
	int daysthismonth = now.getDayOfMonth();
	int dayslastmonth = now.minusDays(daysthismonth).getDayOfMonth();
	return Date.from(LocalDate.now().minusDays(daysthismonth + dayslastmonth - 1).atStartOfDay()
			.atZone(ZoneId.systemDefault()).toInstant());

}
 

private LocalDate previous(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() - 1;
    if (newDayOfMonth > 0) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.with(date.getMonth().minus(1));
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() - 1);
    }
    return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
}
 

private LocalDate previous(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() - 1;
    if (newDayOfMonth > 0) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.with(date.getMonth().minus(1));
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() - 1);
    }
    return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
}
 

@Override
public double getValue(final AnalyticModel model, final double time) {
	final LocalDate calendar = getReferenceDate().plusDays((int) Math.round(time*365));

	final int month = calendar.getMonthValue();				// Note: month = 1,2,3,...,12
	final int day   = calendar.getDayOfMonth(); 				// Note: day = 1,2,3,...,numberOfDays
	final int numberOfDays = calendar.lengthOfMonth();
	final double season = (month-1) / 12.0 + (day-1) / (double)numberOfDays / 12.0;

	return baseCurve.getValue(model, season);
}
 

private LocalDate previous(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() - 1;
    if (newDayOfMonth > 0) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.with(date.getMonth().minus(1));
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() - 1);
    }
    return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
}
 

private LocalDate previous(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() - 1;
    if (newDayOfMonth > 0) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.with(date.getMonth().minus(1));
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() - 1);
    }
    return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
}
 

/**
 * Finds the next leap day after the input date.
 * 
 * @param input  the input date
 * @return the next leap day date
 */
static LocalDate nextLeapDay(LocalDate input) {
  // already a leap day, move forward either 4 or 8 years
  if (input.getMonthValue() == 2 && input.getDayOfMonth() == 29) {
    return ensureLeapDay(input.getYear() + 4);
  }
  // handle if before February 29 in a leap year
  if (input.isLeapYear() && input.getMonthValue() <= 2) {
    return LocalDate.of(input.getYear(), 2, 29);
  }
  // handle any other date
  return ensureLeapDay(((input.getYear() / 4) * 4) + 4);
}
 

private LocalDate previous(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() - 1;
    if (newDayOfMonth > 0) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.with(date.getMonth().minus(1));
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() - 1);
    }
    return date.withDayOfMonth(date.getMonth().length(isIsoLeap(date.getYear())));
}
 

/**
 * isDateAllowed, Return true if a date should be allowed, or false if a date should be
 * vetoed.
 */
@Override
public boolean isDateAllowed(LocalDate date) {
    // Disallow days 7 to 11.
    if ((date.getDayOfMonth() >= 7) && (date.getDayOfMonth() <= 11)) {
        return false;
    }
    // Disallow odd numbered saturdays.
    if ((date.getDayOfWeek() == DayOfWeek.SATURDAY) && ((date.getDayOfMonth() % 2) == 1)) {
        return false;
    }
    // Allow all other days.
    return true;
}
 

private int diffConv30v360(final LocalDate start, final LocalDate end) {
    int dayStart = start.getDayOfMonth();
    int dayEnd = end.getDayOfMonth();
    if (dayEnd == CalculatorConstants.MONTH_31_DAYS && dayStart >= CalculatorConstants.MONTH_30_DAYS) {
        dayEnd = CalculatorConstants.MONTH_30_DAYS;
    }
    if (dayStart == CalculatorConstants.MONTH_31_DAYS) {
        dayStart = CalculatorConstants.MONTH_30_DAYS;
    }
    return (end.getYear() - start.getYear()) * CalculatorConstants.YEAR_360 + (end.getMonthValue() - start.getMonthValue()) * CalculatorConstants.MONTH_30_DAYS + dayEnd - dayStart;
}
 

private LocalDate next(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() + 1;
    if (newDayOfMonth <= date.getMonth().length(isIsoLeap(date.getYear()))) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.withDayOfMonth(1);
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() + 1);
    }
    return date.with(date.getMonth().plus(1));
}
 

@SuppressWarnings("deprecation")
@Test(dataProvider="date")
public void test_date_parse(LocalDate date, FormatStyle dateStyle, int dateStyleOld, Locale locale) {
    DateFormat old = DateFormat.getDateInstance(dateStyleOld, locale);
    Date oldDate = new Date(date.getYear() - 1900, date.getMonthValue() - 1, date.getDayOfMonth());
    String text = old.format(oldDate);

    DateTimeFormatter f = builder.appendLocalized(dateStyle, null).toFormatter(locale);
    TemporalAccessor parsed = f.parse(text, pos);
    assertEquals(pos.getIndex(), text.length());
    assertEquals(pos.getErrorIndex(), -1);
    assertEquals(LocalDate.from(parsed), date);
}
 

public Integer day(LocalDate date) {
    if (date == null) {
        return null;
    }

    return date.getDayOfMonth();
}
 

@SuppressWarnings("deprecation")
@Test(dataProvider="date")
public void test_date_print(LocalDate date, FormatStyle dateStyle, int dateStyleOld, Locale locale) {
    DateFormat old = DateFormat.getDateInstance(dateStyleOld, locale);
    Date oldDate = new Date(date.getYear() - 1900, date.getMonthValue() - 1, date.getDayOfMonth());
    String text = old.format(oldDate);

    DateTimeFormatter f = builder.appendLocalized(dateStyle, null).toFormatter(locale);
    String formatted = f.format(date);
    assertEquals(formatted, text);
}
 

private LocalDate next(LocalDate date) {
    int newDayOfMonth = date.getDayOfMonth() + 1;
    if (newDayOfMonth <= date.getMonth().length(isIsoLeap(date.getYear()))) {
        return date.withDayOfMonth(newDayOfMonth);
    }
    date = date.withDayOfMonth(1);
    if (date.getMonth() == Month.DECEMBER) {
        date = date.withYear(date.getYear() + 1);
    }
    return date.with(date.getMonth().plus(1));
}
 

@SuppressWarnings("deprecation")
@Test(dataProvider="date")
public void test_date_parse(LocalDate date, FormatStyle dateStyle, int dateStyleOld, Locale locale) {
    DateFormat old = DateFormat.getDateInstance(dateStyleOld, locale);
    Date oldDate = new Date(date.getYear() - 1900, date.getMonthValue() - 1, date.getDayOfMonth());
    String text = old.format(oldDate);

    DateTimeFormatter f = builder.appendLocalized(dateStyle, null).toFormatter(locale);
    TemporalAccessor parsed = f.parse(text, pos);
    assertEquals(pos.getIndex(), text.length());
    assertEquals(pos.getErrorIndex(), -1);
    assertEquals(LocalDate.from(parsed), date);
}
 

private static boolean isEqual(LocalDate ld, java.sql.Date d) {
    return ld.getYear() == d.getYear() + 1900 &&
           ld.getMonthValue() == d.getMonth() + 1 &&
           ld.getDayOfMonth() == d.getDate();
}
 

int getDay(LocalDate localDate) {
    return localDate.getDayOfMonth();
}
 

@Override
public boolean matches(LocalDate date) {
  ArgChecker.notNull(date, "date");
  return date.getDayOfMonth() == day ||
      (date.getMonthValue() == 2 && day >= date.lengthOfMonth() && date.getDayOfMonth() == date.lengthOfMonth());
}
 

/**
 * Finds the day-of-year of the date.
 * <p>
 * Faster than the JDK method.
 * 
 * @param date  the date to query
 * @return the day-of-year
 */
static int doy(LocalDate date) {
  int[] lookup = (date.isLeapYear() ? LEAP : STANDARD);
  return lookup[date.getMonthValue()] + date.getDayOfMonth();
}