上周是java.time.LocalDate吗？

Question

I have a weekly statistics system, and I want to check if the last time the statistic was updated was last week. If it was, I want to clear it.

At the moment, the date is stored in a LocalDate :

LocalDate lastUpdate;

I already have the daily statistic working like this:

if(lastUpdate.isBefore(LocalDate.now())
{
    clearDailyStatistics();
}

And I'd like to do something like this:

if(/* something here? */)
{
    clearWeeklyStatistics();
}

So, the question is: How do I compare the weeks of LocalDate objects? There is no need for different "standards" of how week is formed - Monday through Sunday will be used (as is already used by Java's DayOfWeek class).

Please, keep your comments and answers only about Java 8 java.time classes, no Joda-Time or other external libraries.

Answer 1

Try comparing the year and the week in the year, using WEEK_OF_WEEK_BASED_YEAR :

 LocalDate now = LocalDate.now();
 if(lastUpdate.get(IsoFields.WEEK_BASED_YEAR) != now.get(IsoFields.WEEK_BASED_YEAR)
      || lastUpdate.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR) != 
                       now.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR))

Answer 2

Add 7 days or 1 week to your date and compare with current date

if(lastUpdate.plusDays(7).isBefore(LocalDate.now())
{
    clearWeeklyStatistics();
}

OR

if(lastUpdate.plusWeeks(1).isBefore(LocalDate.now()){

  clearWeeklyStatistics();

  }

Edit:- Consider this solution only if you want to compare the crossing of week in terms of 7 days period , See the comments for more details.