如何检查一天是在Java的当前周？

Question

是否有最简单的方法可以找到当天的任何一天？(此函数返回true或false,与给定日相关的是当前周或不是).

Answer 1

您肯定想使用Calendar类:http://docs.oracle.com/javase/6/docs/api/java/util/Calendar.html

这是一种方法:

public static boolean isDateInCurrentWeek(Date date) {
  Calendar currentCalendar = Calendar.getInstance();
  int week = currentCalendar.get(Calendar.WEEK_OF_YEAR);
  int year = currentCalendar.get(Calendar.YEAR);
  Calendar targetCalendar = Calendar.getInstance();
  targetCalendar.setTime(date);
  int targetWeek = targetCalendar.get(Calendar.WEEK_OF_YEAR);
  int targetYear = targetCalendar.get(Calendar.YEAR);
  return week == targetWeek && year == targetYear;
}