时间案例-倒计时

news2024/11/25 13:30:45

需求

在这里插入图片描述

休息日例子

自定义日期类MyDate

日期
记录是否是休息日
记录是否是周末

@Data
@NoArgsConstructor
@AllArgsConstructor
public class MyDate {
    // 日期
    LocalDate date;
    // 是否休息
    boolean isRest;
    // 是否是周末
    boolean isWeekend;
}

starter启动器

// 1. 定义起始的休息时间 2022-02-03
LocalDate startDate = LocalDate.of(2022, 2, 3);

// 2.输入年月 获取当月所有的日期 类型是LocalDate
Scanner scanner = new Scanner(System.in);
System.out.println("请输入年份：");
int year = scanner.nextInt();
System.out.println("请输入月份：");
int month = scanner.nextInt();

// 3. 获取当月的所有日期
LocalDate monthStartDate = LocalDate.of(year, month, 1);
int days = monthStartDate.lengthOfMonth();
// 定义一个MyDate的List,存储计算之后的结果
List<MyDate> myDateList = new ArrayList<>();
for (int i = 0; i < days; i++) {
    LocalDate currentDate = monthStartDate.plusDays(i);
    // 使用当前日期减去起始日期，获取相差的天数，如果相差是3的倍数，就是休息日
    int diff = (int) (currentDate.toEpochDay() - startDate.toEpochDay());
    boolean isRest = diff % 3 == 0;
    // 判断是否是周末
    boolean isWeekend = currentDate.getDayOfWeek().getValue() >= 6;
    MyDate myDate = new MyDate(currentDate, isRest, isWeekend);
    myDateList.add(myDate);
}
myDateList.forEach(myDate -> {
    String dateStr = myDate.getDate().toString();
    if (myDate.isWeekend) {
        dateStr =  dateStr + "【周末】";
    }
    if (myDate.isRest) {
        dateStr =  dateStr + "【休息】";
    }
    // 规定字符串长度为20 不足的补空格
    dateStr = String.format("%-20s", dateStr);
    System.out.print(dateStr);
    if (myDate.isRest) {
        System.out.println();
    }

});

高考倒计时

关键代码： Duration duration = Duration.between(now, startDate);

使用Duration 计算两个 LocalDateTime 的时间间隔

//1. 定义高考时间 2024-06-07
LocalDateTime startDate = LocalDateTime.of(2024, 6, 7, 9, 0, 0);

//2. 设置1秒的时间间隔的计时器
while (true) {
    //3. 获取当前时间
    LocalDateTime now = LocalDateTime.now();
    //4. 计算当前时间距离高考时间的毫秒数
    Duration duration = Duration.between(now, startDate);
    long days = duration.toDays();
    long hours = duration.toHours() % 24;
    long minutes = duration.toMinutes() % 60;
    long seconds = duration.getSeconds() % 60;

    //5. 输出当前时间距离高考时间的天 时 分 秒
    System.out.println("距离高考还有：" + days + "天" + hours + "小时" + minutes + "分钟" + seconds + "秒");
    //6. 休眠1秒
    try {
        Thread.sleep(1000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}