java8 获得周几日期，上一周或下一周，依此类推

/**

* 获得周几日期，上一周或下一周，依此类推

* @param week 指定周几

* @param whichWeek 那一周

* @return string 日期 年-月-日

*/

public static StringgetDayOfWhichWeek(DayOfWeek week, int whichWeek) {

LocalDate day = LocalDate.now().with(TemporalAdjusters.previous(week)).minusWeeks(whichWeek -1);

     return day.toString();

}