我正在尝试检查给定的日期是否在星期日晚上10点到星期五晚上10点之间的范围内
我想使用日历来实现此目的,并且我写了一些逻辑上不正确的代码。我希望在这里有所帮助
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(lastTickTime);
calendar.setTimeZone(TimeZone.getTimeZone("GMT"));
int currentHour = calendar.get(Calendar.HOUR_OF_DAY);
int currentDay = calendar.get(Calendar.DAY_OF_WEEK);
int fromDay = 1;
int toDay = 6;
int fromHour = 22;
int toHour = 22;
boolean result = (currentDay <= fromDay && currentHour < fromHour) || (currentDay >= toDay && currentHour > toHour);
我知道上述方法是不正确的,我不确定如何去做。谢谢
我刚刚看到您在评论中提到了以下内容:
如果在星期五晚上10点到星期天晚上10点之间返回,则返回true
这完全不同于您在问题中提到的内容(如下所述):
我正在尝试检查给定的日期是否在星期日晚上10点到星期五晚上10点之间的范围内
我已经为您提供了一种解决方案,用于检查星期天晚上10点到星期五晚上10点之间的日期时间(请参阅“原始解决方案”部分)。
下面给出的是一周中周五晚上10点到周日晚上10点之间的日期时间解决方案:
import java.time.DayOfWeek;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoField;
public class Main {
public static void main(String[] args) {
// Test
System.out.println(isValidTime("2020-12-25T09:38:08", "America/Chicago"));// Should be false
System.out.println(isValidTime("2020-12-25T22:38:08", "America/Chicago"));// Should be true
System.out.println(isValidTime("2020-12-26T09:38:08", "America/Chicago"));// Should be true
System.out.println(isValidTime("2020-12-27T09:38:08", "America/Chicago"));// Should be true
System.out.println(isValidTime("2020-12-27T22:38:08", "America/Chicago"));// Should be false
}
static boolean isValidTime(String strDateTime, String timezone) {
ZoneId zoneId = ZoneId.of(timezone);
ZonedDateTime zdt = LocalDateTime.parse(strDateTime).atZone(zoneId).withZoneSameInstant(ZoneOffset.UTC);
ZonedDateTime fri10Pm = zdt.with(ChronoField.DAY_OF_WEEK, DayOfWeek.FRIDAY.getValue())
.with(LocalTime.of(22, 0));
ZonedDateTime sun10Pm = zdt.with(ChronoField.DAY_OF_WEEK, DayOfWeek.SUNDAY.getValue())
.with(LocalTime.of(22, 0));
return zdt.isAfter(fri10Pm) && zdt.isBefore(sun10Pm);
}
}
输出:
false
true
true
true
false
java.util
及其格式APISimpleDateFormat
已过时且容易出错。建议完全停止使用它们,并切换到现代日期时间API。
使用java.time
(现代的日期时间API):
import java.time.DayOfWeek;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoField;
public class Main {
public static void main(String[] args) {
// Test
System.out.println(isValidTime("2020-12-25T09:38:08", "America/Chicago"));// Should be true
System.out.println(isValidTime("2020-12-26T09:38:08", "America/Chicago"));// Should be false
System.out.println(isValidTime("2020-12-27T09:38:08", "America/Chicago"));// Should be false
System.out.println(isValidTime("2020-12-27T22:38:08", "America/Chicago"));// Should be true
System.out.println(isValidTime("2021-01-01T09:38:08", "America/Chicago"));// Should be true
System.out.println(isValidTime("2021-01-01T23:38:08", "America/Chicago"));// Should be false
}
static boolean isValidTime(String strDateTime, String timezone) {
ZoneId zoneId = ZoneId.of(timezone);
ZonedDateTime zdt = LocalDateTime.parse(strDateTime).atZone(zoneId).withZoneSameInstant(ZoneOffset.UTC);
ZonedDateTime temp = zdt.getDayOfWeek() != DayOfWeek.SUNDAY ? zdt.minusWeeks(1) : zdt;
ZonedDateTime sun10Pm = temp.with(ChronoField.DAY_OF_WEEK, DayOfWeek.SUNDAY.getValue())
.with(LocalTime.of(22, 0));
ZonedDateTime fri10PmNextWeek = temp.plusWeeks(1).with(ChronoField.DAY_OF_WEEK, DayOfWeek.FRIDAY.getValue())
.with(LocalTime.of(22, 0));
return zdt.isAfter(sun10Pm) && zdt.isBefore(fri10PmNextWeek);
}
}
输出:
true
false
false
true
true
false
该解决方案基于以下假设,如果与任何这些假设存在偏差,则应对其进行调整:
UTC
。该解决方案将日期时间字符串解析为本地日期时间(没有任何时区信息的日期时间),然后将其转换ZonedDateTime
为该日期时间所属的时区。最后,将ZonedDateTime
其转换为中的日期时间UTC
。Sun
,比较应的日期来完成从上次Sun
的到来Fri
。10 pm
不包含在内。附录:
如果您不必处理时区,并且只想检查给定的日期时间是否在星期五晚上10点至星期日晚上10点之间,则可以使用LocalDateTime
。
import java.time.DayOfWeek;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.temporal.ChronoField;
public class Main {
public static void main(String[] args) {
// Test
System.out.println(isValidTime("2020-12-25T09:38:08"));// Should be false
System.out.println(isValidTime("2020-12-25T22:38:08"));// Should be true
System.out.println(isValidTime("2020-12-26T09:38:08"));// Should be true
System.out.println(isValidTime("2020-12-27T09:38:08"));// Should be true
System.out.println(isValidTime("2020-12-27T22:38:08"));// Should be false
}
static boolean isValidTime(String strDateTime) {
LocalDateTime ldt = LocalDateTime.parse(strDateTime);
LocalDateTime fri10Pm = ldt.with(ChronoField.DAY_OF_WEEK, DayOfWeek.FRIDAY.getValue())
.with(LocalTime.of(22, 0));
LocalDateTime sun10Pm = ldt.with(ChronoField.DAY_OF_WEEK, DayOfWeek.SUNDAY.getValue())
.with(LocalTime.of(22, 0));
return ldt.isAfter(fri10Pm) && ldt.isBefore(sun10Pm);
}
}
输出:
false
true
true
true
false
使用旧版API:
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class Main {
public static void main(String[] args) throws ParseException {
// Test
System.out.println(isValidTime("2020-12-25T09:38:08"));// Should be false
System.out.println(isValidTime("2020-12-25T22:38:08"));// Should be true
System.out.println(isValidTime("2020-12-26T09:38:08"));// Should be true
System.out.println(isValidTime("2020-12-27T09:38:08"));// Should be true
System.out.println(isValidTime("2020-12-27T22:38:08"));// Should be false
}
static boolean isValidTime(String strDateTime) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
Date date = sdf.parse(strDateTime);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY);
calendar.set(Calendar.HOUR_OF_DAY, 22);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
Date fri10Pm = calendar.getTime();
calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
calendar.set(Calendar.HOUR_OF_DAY, 22);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
Date sun10Pm = calendar.getTime();
return date.after(fri10Pm) && date.before(sun10Pm);
}
}
输出:
false
true
true
true
false
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