Возможно, мне что-то не хватает, но я не могу найти объяснения в документации Joda Time или в любом месте. Кажется, что Joda Time ломается при расчете недель, когда вы добавляете и вычитаете недели, когда вы переходите с одного года на другой.
Может ли кто-нибудь объяснить, почему это происходит и как правильно это сделать?
Я получаю следующий вывод из моего кода ниже:
2015-01-08 - This is the current week
2015-01-01 - Removed one week
2014-12-25 - Removed one week
2014-12-17 - Removed one week //for some reason, program backed 8 days here
2014-12-10 - Removed one week
2014-12-17 - Added one week
2014-12-24 - Added one week
2014-12-31 - Added one week
2014-01-08 - Added one week //for some reason, program forwarded 8 days here, but it did not forward to 2015.
Оригинальный код
import org.joda.time.*;
public class WonkyWeeks {
int year;
int week;
public void backUpOneWeek() {
LocalDate today = new LocalDate()
.withDayOfWeek(4)
.withWeekOfWeekyear(week)
.withYear(year);
LocalDate lastWeek = today.minusWeeks(1);
week = lastWeek.getWeekOfWeekyear();
year = lastWeek.getYear();
System.out.println(lastWeek+" - Removed one week");
}
public void forwardOneWeek() {
LocalDate today = new LocalDate()
.withDayOfWeek(4)
.withWeekOfWeekyear(week)
.withYear(year);
LocalDate nextWeek = today.plusWeeks(1);
week = nextWeek.getWeekOfWeekyear();
year = nextWeek.getYear();
System.out.println(nextWeek+" - Added one week");
}
public void thisWeek() {
LocalDate thisWeek = new LocalDate()
.withDayOfWeek(4)
.withWeekOfWeekyear(week)
.withYear(year);
System.out.println(thisWeek+" - This is the current week");
}
public static void main(String[] args) {
WonkyWeeks wonky = new WonkyWeeks();
wonky.week = 2;
wonky.year = 2015;
wonky.thisWeek();
wonky.backUpOneWeek();
wonky.backUpOneWeek();
wonky.backUpOneWeek();
wonky.backUpOneWeek();
wonky.forwardOneWeek();
wonky.forwardOneWeek();
wonky.forwardOneWeek();
wonky.forwardOneWeek();
}
}
После дальнейшего тестирования он становится еще более запутанным. Я пробовал просто добавлять и удалять дни, а не недели, и по какой-то причине они пропускают даты.
Вывод:
2015-01-08 - This is the current week
2015-01-07 - removed one day
2015-01-06 - removed one day
2015-01-05 - removed one day
2015-01-04 - removed one day
2015-01-03 - removed one day
2015-01-02 - removed one day
2015-01-01 - Removed one full week
2014-12-31 - removed one day
2014-12-30 - removed one day
2014-12-29 - removed one day
2014-12-28 - removed one day
2014-12-27 - removed one day
2014-12-26 - removed one day
2014-12-25 - Removed one full week
2014-12-23 - removed one day // For some reason, it skipped 2014-12-24?
2014-12-22 - removed one day
2014-12-21 - removed one day
2014-12-20 - removed one day
2014-12-19 - removed one day
2014-12-18 - removed one day
2014-12-17 - Removed one full week
2014-12-16 - removed one day
2014-12-15 - removed one day
2014-12-14 - removed one day
2014-12-13 - removed one day
2014-12-12 - removed one day
2014-12-11 - removed one day
2014-12-10 - Removed one full week
2014-12-11 - added one day
2014-12-12 - added one day
2014-12-13 - added one day
2014-12-14 - added one day
2014-12-15 - added one day
2014-12-16 - added one day
2014-12-17 - Added one week
2014-12-18 - added one day
2014-12-19 - added one day
2014-12-20 - added one day
2014-12-21 - added one day
2014-12-22 - added one day
2014-12-23 - added one day
2014-12-24 - Added one week
2014-12-25 - added one day
2014-12-26 - added one day
2014-12-27 - added one day
2014-12-28 - added one day
2014-12-29 - added one day
2014-12-30 - added one day
2014-12-31 - Added one week
2014-01-02 - added one day //Skipped 2014-01-01 and did not forward to 2015
2014-01-03 - added one day
2014-01-04 - added one day
2014-01-05 - added one day
2014-01-06 - added one day
2014-01-07 - added one day
2014-01-08 - Added one week
Дополнительный код тестирования
import org.joda.time.*;
public class WonkyWeeks {
int year;
int week;
public void backUpOneWeek() {
LocalDate today = new LocalDate()
.withDayOfWeek(4)
.withWeekOfWeekyear(week)
.withYear(year);
LocalDate adayago = today.minusDays(1);
System.out.println(adayago+" - removed one day");
LocalDate twodaysago = adayago.minusDays(1);
System.out.println(twodaysago+" - removed one day");
LocalDate threedaysago = twodaysago.minusDays(1);
System.out.println(threedaysago+" - removed one day");
LocalDate fourdaysago = threedaysago.minusDays(1);
System.out.println(fourdaysago+" - removed one day");
LocalDate fivedaysago = fourdaysago.minusDays(1);
System.out.println(fivedaysago+" - removed one day");
LocalDate sixdaysago = fivedaysago.minusDays(1);
System.out.println(sixdaysago+" - removed one day");
LocalDate lastWeek = sixdaysago.minusDays(1);
week = lastWeek.getWeekOfWeekyear();
year = lastWeek.getYear();
System.out.println(lastWeek+" - Removed one full week");
}
public void forwardOneWeek() {
LocalDate today = new LocalDate()
.withDayOfWeek(4)
.withWeekOfWeekyear(week)
.withYear(year);
LocalDate tomorrow = today.plusDays(1);
System.out.println(tomorrow+" - added one day");
LocalDate dayAfterTomorrow = tomorrow.plusDays(1);
System.out.println(dayAfterTomorrow+" - added one day");
LocalDate threeDaysFromNow = dayAfterTomorrow.plusDays(1);
System.out.println(threeDaysFromNow+" - added one day");
LocalDate fourDaysFromNow = threeDaysFromNow.plusDays(1);
System.out.println(fourDaysFromNow+" - added one day");
LocalDate fiveDaysFromNow = fourDaysFromNow.plusDays(1);
System.out.println(fiveDaysFromNow+" - added one day");
LocalDate sixDaysFromNow = fiveDaysFromNow.plusDays(1);
System.out.println(sixDaysFromNow+" - added one day");
LocalDate nextWeek = sixDaysFromNow.plusDays(1);
week = nextWeek.getWeekOfWeekyear();
year = nextWeek.getYear();
System.out.println(nextWeek+" - Added one week");
}
public void thisWeek() {
LocalDate thisWeek = new LocalDate()
.withDayOfWeek(4)
.withWeekOfWeekyear(week)
.withYear(year);
System.out.println(thisWeek+" - This is the current week");
}
public static void main(String[] args) {
WonkyWeeks wonky = new WonkyWeeks();
wonky.week = 2;
wonky.year = 2015;
wonky.thisWeek();
wonky.backUpOneWeek();
wonky.backUpOneWeek();
wonky.backUpOneWeek();
wonky.backUpOneWeek();
wonky.forwardOneWeek();
wonky.forwardOneWeek();
wonky.forwardOneWeek();
wonky.forwardOneWeek();
}
}