Java LocalDateTime.plusHours方法代码示例

import java.time.LocalDateTime; //导入方法依赖的package包/类
@Test
public void test_plusHours_one() {
    LocalDateTime t = TEST_2007_07_15_12_30_40_987654321.with(LocalTime.MIDNIGHT);
    LocalDate d = t.toLocalDate();

    for (int i = 0; i < 50; i++) {
        t = t.plusHours(1);

        if ((i + 1) % 24 == 0) {
            d = d.plusDays(1);
        }

        assertEquals(t.toLocalDate(), d);
        assertEquals(t.getHour(), (i + 1) % 24);
    }
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
@Test
public void test_plusHours_fromZero() {
    LocalDateTime base = TEST_2007_07_15_12_30_40_987654321.with(LocalTime.MIDNIGHT);
    LocalDate d = base.toLocalDate().minusDays(3);
    LocalTime t = LocalTime.of(21, 0);

    for (int i = -50; i < 50; i++) {
        LocalDateTime dt = base.plusHours(i);
        t = t.plusHours(1);

        if (t.getHour() == 0) {
            d = d.plusDays(1);
        }

        assertEquals(dt.toLocalDate(), d);
        assertEquals(dt.toLocalTime(), t);
    }
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
@Override public void init() {
    int               noOfValues = 24 * 60;
    LocalDateTime     start      = LocalDateTime.now();
    LocalDateTime     end        = start.plusHours(24);
    List<TYChartItem> tyData1    = new ArrayList<>();

    for (int i = 0 ; i < noOfValues ; i++) {
        tyData1.add(new TYChartItem(start.plusMinutes(i), RND.nextDouble() * 12 + RND.nextDouble() * 6, "P" + i, COLORS[RND.nextInt(3)]));
    }

    tySeries1 = new XYSeries(tyData1, ChartType.LINE, Color.RED, Color.rgb(255, 0, 0, 0.5));
    tySeries1.setSymbolsVisible(false);

    // XYChart
    Converter tempConverter     = new Converter(TEMPERATURE, CELSIUS); // Type Temperature with BaseUnit Celsius
    double    tempFahrenheitMin = tempConverter.convert(0, FAHRENHEIT);
    double    tempFahrenheitMax = tempConverter.convert(20, FAHRENHEIT);

    xAxisBottom = createBottomTimeAxis(start, end, "HH:mm", true);
    yAxisLeft   = createLeftYAxis(0, 20, true);
    yAxisRight  = createRightYAxis(tempFahrenheitMin, tempFahrenheitMax, false);
    tyChart     = new XYChart<>(new XYPane(tySeries1), yAxisLeft, yAxisRight, xAxisBottom);
    tyChart.setPrefSize(400, 200);
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
public Timestamp getTimestamp(String daysS, String hoursS, String minutesS){
	daysS = daysS==null || daysS.equals("") ? "0" : daysS;
	hoursS = hoursS==null || hoursS.equals("") ? "0" : hoursS;
	minutesS = minutesS==null || minutesS.equals("") ? "0" : minutesS;
	
	Integer days = Integer.parseInt(daysS);
	Integer hours = Integer.parseInt(hoursS);
	Integer minutes = Integer.parseInt(minutesS);
	
	if(days==0 && hours==0 && minutes==0){
		days = 10000;
		hours = 11;
		minutes = 59;
	}
	
	days = days > 10000 ? 10000 : days;
	hours = hours%24;
	minutes = minutes%60;
	
	LocalDateTime localDateTime = LocalDateTime.now();
	localDateTime = localDateTime.plusDays(days);
	localDateTime = localDateTime.plusHours(hours);
	localDateTime = localDateTime.plusMinutes(minutes);
	
	return Timestamp.valueOf(localDateTime);
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
@Test
public void test_plusHours_fromOne() {
    LocalDateTime base = TEST_2007_07_15_12_30_40_987654321.with(LocalTime.of(1, 0));
    LocalDate d = base.toLocalDate().minusDays(3);
    LocalTime t = LocalTime.of(22, 0);

    for (int i = -50; i < 50; i++) {
        LocalDateTime dt = base.plusHours(i);

        t = t.plusHours(1);

        if (t.getHour() == 0) {
            d = d.plusDays(1);
        }

        assertEquals(dt.toLocalDate(), d);
        assertEquals(dt.toLocalTime(), t);
    }
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
@Test
public void raidsCollide() throws Exception {
    final ClockService currentTimeService = new ClockService();
    currentTimeService.setMockTime(LocalTime.of(10, 0));
    LocalDateTime startOne = currentTimeService.getCurrentDateTime();
    LocalDateTime endOne = startOne.plusHours(1);
    LocalDateTime startTwo = currentTimeService.getCurrentDateTime().minusMinutes(1);
    LocalDateTime endTwo = startTwo.plusHours(1);
    assertThat(Utils.raidsCollide(endOne, false, endTwo, false), is(true));
    assertThat(Utils.raidsCollide(endTwo, false, endOne, false), is(true));

    startOne = currentTimeService.getCurrentDateTime();
    endOne = startOne.plusMinutes(10);
    startTwo = currentTimeService.getCurrentDateTime().plusMinutes(11);
    endTwo = startTwo.plusHours(1);
    assertThat(Utils.raidsCollide(endOne, false, endTwo, false), is(false));
    assertThat(Utils.raidsCollide(endTwo, false, endOne, false), is(false));
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
protected static LocalDateTime computeFirstResetTime(LocalDateTime baseTime, int time, TimeUnit unit) {
    if (unit != TimeUnit.SECONDS && unit != TimeUnit.MINUTES && unit != TimeUnit.HOURS && unit != TimeUnit.DAYS) {
        throw new IllegalArgumentException();
    }
    LocalDateTime t = baseTime;
    switch (unit) {
        case DAYS:
            t = t.plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
            break;
        case HOURS:
            if (24 % time == 0) {
                t = t.plusHours(time - t.getHour() % time);
            } else {
                t = t.plusHours(1);
            }
            t = t.withMinute(0).withSecond(0).withNano(0);
            break;
        case MINUTES:
            if (60 % time == 0) {
                t = t.plusMinutes(time - t.getMinute() % time);
            } else {
                t = t.plusMinutes(1);
            }
            t = t.withSecond(0).withNano(0);
            break;
        case SECONDS:
            if (60 % time == 0) {
                t = t.plusSeconds(time - t.getSecond() % time);
            } else {
                t = t.plusSeconds(1);
            }
            t = t.withNano(0);
            break;
    }
    return t;
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
/**
 * 时间运算,计算完成后会返回新的对象,并不会改变原来的时间
 */
@Test
public void testClacPlus() {
    LocalDateTime ldt = LocalDateTime.now();

    System.out.println(ldt);

    // 加: 天
    LocalDateTime day = ldt.plusDays(1);
    System.out.println("day: " + day);

    // 加: 小时
    LocalDateTime hours = ldt.plusHours(1);
    System.out.println("hours: " + hours);

    // 加: 分钟
    LocalDateTime minutes = ldt.plusMinutes(1);
    System.out.println("minutes: " + minutes);

    // 加: 月
    LocalDateTime months = ldt.plusMonths(1);
    System.out.println("months: " + months);

    // 加: 纳秒
    LocalDateTime nanos = ldt.plusNanos(1);
    System.out.println("nanos: " + nanos);

    // 加: 秒
    LocalDateTime seconds = ldt.plusSeconds(1);
    System.out.println("seconds: " + seconds);

    // 加: 周
    LocalDateTime weeks = ldt.plusWeeks(1);
    System.out.println("weeks: " + weeks);

    // 加: 年
    LocalDateTime years = ldt.plusYears(1);
    System.out.println("years: " + years);

    System.out.println(ldt);
}
 

import java.time.LocalDateTime; //导入方法依赖的package包/类
/**
 * 计算 hour 小时后的时间
 *
 * @param date 长日期
 * @param hour 增加的小时数
 * @return 增加后的日期
 */
public static LocalDateTime addHour(LocalDateTime date, int hour) {
    return date.plusHours(hour);
}