检查ZonedDateTime是否在特定时间之间

Question

我正在使用以下代码获取位置的时间和日期

dateAndTimeForAccount

如何检查reader.NextResult();是否在早上6点到10点之间？

Answer 1

一种可能的解决方案是使用ValueRange。

ZoneId zoneId = ZoneId.of("America/New_York");
ZonedDateTime dateAndTimeForAccount = ZonedDateTime.ofInstant(now, zoneId);
System.out.println(dateAndTimeForAccount);

ValueRange hourRange = ValueRange.of(8, 10);
System.out.printf("is hour (%s) in range [%s] -> %s%n", 
        dateAndTimeForAccount.getHour(),
        hourRange, 
        hourRange.isValidValue(dateAndTimeForAccount.getHour())
);

示例输出

2017-01-11T07:34:26.932-05:00[America/New_York]
is hour (7) in range [8 - 10] -> false

Answer 2

int currentHour = dateAndTimeForAccount.getHour();
boolean isBetween6And10 = 6 <= currentHour && currentHour <= 10;

如果要为任何特定的java.time类进行概括，可以使用TemporalQuery类：

class HourTester extends TemporalQuery<Boolean> {
    @Override
    public Boolean queryFrom(TemporalAccessor temporal) {
        int hour = temporal.get(ChronoField.HOUR_OF_DAY);
        return 6 <= hour && hour <= 10;
    }
}

用法：boolean isBetween6And10 = dateAndTimeForAccount.query(new HourTester());

Answer 3

在6 am到10 am独占之间

这对于“ 99％” 的情况就足够了，因为“ you” 无法保证JVM时钟的精确度超过1毫秒。

    return 6 <= t.getHour() && t.getHour() < 10;

---

介于6 to 10 am之间

  static final LocalTime OPEN_TIME = LocalTime.of(06, 00);
  static final LocalTime CLOSE_TIME = LocalTime.of(10, 00);

    return !t.toLocalTime().isBefore(OPEN_TIME) && !t.toLocalTime().isAfter(CLOSE_TIME);

---

介于6 to 10 am之间

    return t.toLocalTime().isAfter(OPEN_TIME) && t.toLocalTime().isBefore(CLOSE_TIME);

---

证明：

  boolean isWithinSixToTen(ZonedDateTime t) {
    return 6 <= t.getHour() && t.getHour() < 10;
  }



import static org.assertj.core.api.Assertions.assertThat;

  ZonedDateTime time(String time) {
    return ZonedDateTime.parse("2017-01-11" + "T" + time + "-05:00[America/New_York]");
  }

    assertThat(isWithinSixToTen(time("10:01"))).isFalse();
    assertThat(isWithinSixToTen(time("10:00"))).isFalse();
    assertThat(isWithinSixToTen(time("09:59:59.999999999"))).isTrue();
    assertThat(isWithinSixToTen(time("06:00"))).isTrue();
    assertThat(isWithinSixToTen(time("05:59"))).isFalse();