Java 获取当周的开始时间

以周一作为周的开始时间：

        DateTimeFormatter pattern = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime nowWeekStart =  LocalDate.now().with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY)).atStartOfDay();
        String nowWeekStartTime = nowWeekStart.format(pattern);
        System.out.println("当周开始时间 = " + nowWeekStartTime);