方法1:使用LocalDateTime,线程安全
LocalDate currentDay = LocalDate.now();
LocalDateTime timePrevious = currentDay.minusDays(daysAhead).atTime(0,0,
方法1:使用LocalDateTime,线程安全
LocalDate currentDay = LocalDate.now();
LocalDateTime timePrevious = currentDay.minusDays(daysAhead).atTime(0,0,