Java LocalDate.with方法代碼示例

import java.time.LocalDate; //導入方法依賴的package包/類
@GetMapping(value = "/prof/noti")
public String getProfNotifications(Model model) {
    try {
        LocalDate currDate = LocalDate.now();
        if (currDate.getDayOfWeek().equals(DayOfWeek.SATURDAY)
                || currDate.getDayOfWeek().equals(DayOfWeek.SUNDAY))
            currDate = currDate.plus(3, ChronoUnit.DAYS);

        LocalDate startDateOfSchoolWeek = currDate.with(DayOfWeek.MONDAY);

        String profEmail = authFacade.getAuthentication().getName();
        Professor prof = professorService.getProfessorByEmail(profEmail);

        List<BookingSlot> profBookings
                = bookingSlotService.getSlotsByProfAndSWeek(prof.getAlias(), startDateOfSchoolWeek);

        model.addAttribute("bookings", filterBookingSlots(profBookings));
        return "fragments/prof_noti";

    } catch (Exception ex) {
        ex.printStackTrace();

        model.addAttribute("message", ex.toString());
        return "error";
    }
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
@Test(dataProvider="weekFields")
public void test_withDayOfWeek(DayOfWeek firstDayOfWeek, int minDays) {
    LocalDate day = LocalDate.of(2012, 12, 15);  // Safely in the middle of a month
    WeekFields week = WeekFields.of(firstDayOfWeek, minDays);
    TemporalField dowField = week.dayOfWeek();
    TemporalField womField = week.weekOfMonth();
    TemporalField woyField = week.weekOfYear();

    int wom = day.get(womField);
    int woy = day.get(woyField);
    for (int dow = 1; dow <= 7; dow++) {
        LocalDate result = day.with(dowField, dow);
        assertEquals(result.get(dowField), dow, String.format("Incorrect new Day of week: %s", result));
        assertEquals(result.get(womField), wom, "Week of Month should not change");
        assertEquals(result.get(woyField), woy, "Week of Year should not change");
    }
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
@GetMapping(value = "/student/noti")
public String getStudentNotifications(Model model) {
    try {
        LocalDate currDate = LocalDate.now();
        if (currDate.getDayOfWeek().equals(DayOfWeek.SATURDAY)
                || currDate.getDayOfWeek().equals(DayOfWeek.SUNDAY))
            currDate = currDate.plus(3, ChronoUnit.DAYS);

        LocalDate startDateOfSchoolWeek = currDate.with(DayOfWeek.MONDAY);

        String studentEmail = authFacade.getAuthentication().getName();
        Student student = studentService.getStudentByEmail(studentEmail);

        List<BookingSlot> studentBookings
                = bookingSlotService.getSlotsByStudentAndSWeek(student.getId(), startDateOfSchoolWeek);

        model.addAttribute("bookings", filterStudentBookings(studentBookings));
        return "fragments/student_noti";

    } catch (Exception ex) {
        ex.printStackTrace();

        model.addAttribute("message", ex.toString());
        return "error";
    }
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * Returns java.util weekend date (Sunday) for a given date.
 *
 * @return
 */
public static Date getTimesheetWeekStartDate(Date inputDate) {
    log.info("Inside getTimesheetWeekStartDate :: inputDate: " + inputDate);
    if (inputDate != null) {
        LocalDate localDate = inputDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
        LocalDate firstMonday = localDate.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY));
        log.info("Inside inputdate not null loop, firstMonday: " + firstMonday);
        return Date.from(firstMonday.atStartOfDay(ZoneId.systemDefault()).toInstant());
    } else {
        log.error("Input date not found. So returning null.");
        return null;
    }
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
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())));
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * Returns java.util weekend date (Sunday) for a given date.
 *
 * @return
 */
public static Date getTimesheetWeekEndDate(Date inputDate) {
    log.info("Inside getTimesheetWeekEndDate :: inputDate: " + inputDate);
    if (inputDate != null) {
        LocalDate localDate = inputDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
        LocalDate lastSunday = localDate.with(TemporalAdjusters.nextOrSame(DayOfWeek.SUNDAY));
        log.info("Inside input date not null loop, lastSunday: " + lastSunday);
        return Date.from(lastSunday.atStartOfDay(ZoneId.systemDefault()).toInstant());
    } else {
        log.error("Input date not found. So returning null.");
        return null;
    }
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
@Test(dataProvider="weekFields")
public void test_withWeekOfWeekBasedYear(DayOfWeek firstDayOfWeek, int minDays) {
    LocalDate day = LocalDate.of(2012, 12, 31);
    WeekFields week = WeekFields.of(firstDayOfWeek, minDays);
    TemporalField dowField = week.dayOfWeek();
    TemporalField wowbyField = week.weekOfWeekBasedYear();
    TemporalField yowbyField = week.weekBasedYear();

    int dowExpected = (day.get(dowField) - 1) % 7 + 1;
    LocalDate dowDate = day.with(dowField, dowExpected);
    int dowResult = dowDate.get(dowField);
    assertEquals(dowResult, dowExpected, "Localized DayOfWeek not correct; " + day + " -->" + dowDate);

    int weekExpected = day.get(wowbyField) + 1;
    ValueRange range = day.range(wowbyField);
    weekExpected = ((weekExpected - 1) % (int)range.getMaximum()) + 1;
    LocalDate weekDate = day.with(wowbyField, weekExpected);
    int weekResult = weekDate.get(wowbyField);
    assertEquals(weekResult, weekExpected, "Localized WeekOfWeekBasedYear not correct; " + day + " -->" + weekDate);

    int yearExpected = day.get(yowbyField) + 1;

    LocalDate yearDate = day.with(yowbyField, yearExpected);
    int yearResult = yearDate.get(yowbyField);
    assertEquals(yearResult, yearExpected, "Localized WeekBasedYear not correct; " + day  + " --> " + yearDate);

    range = yearDate.range(wowbyField);
    weekExpected = Math.min(day.get(wowbyField), (int)range.getMaximum());

    int weekActual = yearDate.get(wowbyField);
    assertEquals(weekActual, weekExpected, "Localized WeekOfWeekBasedYear week should not change; " + day + " --> " + yearDate + ", actual: " + weekActual + ", weekExpected: " + weekExpected);
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 程序執行入口.
 *
 * @param args 命令行參數
 */
public static void main(String[] args) {

	LocalDate today = LocalDate.now();

	//Get the Year, check if it's leap year
	System.out.println("Year " + today.getYear() + " is Leap Year? " + today.isLeapYear());

	//Compare two LocalDate for before and after
	System.out.println("Today is before 01/01/2015? " + today.isBefore(LocalDate.of(2015, 1, 1)));

	//Create LocalDateTime from LocalDate
	System.out.println("Current Time=" + today.atTime(LocalTime.now()));

	//plus and minus operations
	System.out.println("10 days after today will be " + today.plusDays(10));
	System.out.println("3 weeks after today will be " + today.plusWeeks(3));
	System.out.println("20 months after today will be " + today.plusMonths(20));

	System.out.println("10 days before today will be " + today.minusDays(10));
	System.out.println("3 weeks before today will be " + today.minusWeeks(3));
	System.out.println("20 months before today will be " + today.minusMonths(20));

	//Temporal adjusters for adjusting the dates
	System.out.println("First date of this month= " + today.with(TemporalAdjusters.firstDayOfMonth()));
	LocalDate lastDayOfYear = today.with(TemporalAdjusters.lastDayOfYear());
	System.out.println("Last date of this year= " + lastDayOfYear);

	Period period = today.until(lastDayOfYear);
	System.out.println("Period Format= " + period);
	System.out.println("Months remaining in the year= " + period.getMonths());
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
@Test
public void test_adjust1() {
    LocalDate base = IsoChronology.INSTANCE.date(1728, 10, 28);
    LocalDate test = base.with(TemporalAdjusters.lastDayOfMonth());
    assertEquals(test, IsoChronology.INSTANCE.date(1728, 10, 31));
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 得到當月起始時間
 *
 * @param date 日期
 * @return 傳入的日期當月的開始日期
 */
public static LocalDate getMonthStart(LocalDate date) {

    return date.with(TemporalAdjusters.firstDayOfMonth());
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 得到當前年起始時間
 *
 * @param date 日期
 * @return 傳入的日期當年的開始日期
 */
public static LocalDate getYearStart(LocalDate date) {
    return date.with(TemporalAdjusters.firstDayOfYear());
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 得到當前年最後一天
 *
 * @param date 日期
 * @return 傳入的日期當年的結束日期
 */
public static LocalDate getYearEnd(LocalDate date) {
    return date.with(TemporalAdjusters.lastDayOfYear());
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 得到傳入日期,周起始時間
 * 這個方法定義:周一為一個星期開始的第一天
 *
 * @param date 日期
 * @return 返回一周的第一天
 */
public static LocalDate getWeekStart(LocalDate date) {
    return date.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY));
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 得到當前周截止時間
 * 這個方法定義:周日為一個星期開始的最後一天
 *
 * @param date 日期
 * @return 返回一周的最後一天
 */
public static LocalDate getWeekEnd(LocalDate date) {
    return date.with(TemporalAdjusters.previousOrSame(DayOfWeek.SUNDAY));
}
 

import java.time.LocalDate; //導入方法依賴的package包/類
/**
 * 得到month的終止時間點.
 *
 * @param date 日期
 * @return 傳入的日期當月的結束日期
 */
public static LocalDate getMonthEnd(LocalDate date) {
    return date.with(TemporalAdjusters.lastDayOfMonth());
}