JAVA输出选定时间一个月所有天，每天是星期几

public static List<Map<String, String>> getWeekDayInMonth(String date)
	{
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		List<Map<String, String>> resultList = new ArrayList<>();
		String[] weeks = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
		Calendar calendar = Calendar.getInstance();
		try
		{
			calendar.setTime(sdf.parse(date));
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		int days = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
		int weekday = calendar.get(Calendar.DAY_OF_WEEK) - 1;// 1是星期日
		String cWeekDay = weeks[weekday];
		Map<String, String> fristDate = new HashMap<>();
		fristDate.put("code", weekday + "");
		fristDate.put("weekday", cWeekDay);
		fristDate.put("date", sdf.format(calendar.getTime()));
		resultList.add(fristDate);
		for (int i = 1; i < days; i++)
		{
			calendar.add(calendar.DATE, 1);
			int weekday2 = calendar.get(Calendar.DAY_OF_WEEK) - 1;// 1是星期日
			String cWeekDay2 = weeks[weekday2];
			Map<String, String> map = new HashMap<>();
			map.put("code", weekday2 + "");
			map.put("weekday", cWeekDay2);
			map.put("date", sdf.format(calendar.getTime()));
			resultList.add(map);
		}
		return resultList;
	}

public static void main(String[] args) {
		try {
		List<Map<String, String>> list=getWeekDayInMonth("2019-07-01");
			for(Map<String, String> li:list){
				System.out.println(li);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}