获取某一日期的一周日期星期

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        SimpleDateFormat dateTimeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        SimpleDateFormat dateFormatWeek = new SimpleDateFormat("EE");
        SimpleDateFormat dateTimeFormatNoSplit = new SimpleDateFormat("yyyyMMddHHmmss");
        
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
          String dateTimeStr = dateTimeFormat.format(calendar.getTime());
          String dateTimeStrNoSplit = dateTimeFormatNoSplit.format(calendar.getTime());
          while (calendar.get(Calendar.DAY_OF_WEEK) != Calendar.MONDAY) {
                calendar.add(Calendar.DATE, -1);
            }
          for (int i = 0; i < 7; i++) {
              String dateStr = dateFormat.format(calendar.getTime());
                
                String weekStr = dateFormatWeek.format(calendar.getTime());
              System.out.println(dateStr+weekStr);
              calendar.add(Calendar.DATE, 1);
          }
    }