用map返回一年中所有的日期

public static Map<String, String> getDayOfYear(){
        Map<String,String> map=new HashMap<String,String>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        List<String> fullDayList = new ArrayList<String>(32);
        Calendar ca = Calendar.getInstance();
        ca.clear();
        ca.set(Calendar.YEAR, 2019);
        ca.set(Calendar.MONTH,0);
        ca.set(Calendar.DAY_OF_MONTH, 0);
        int count = ca.getActualMaximum(Calendar.DAY_OF_YEAR);
        for (int j = 1; j <= count ; j++) {
            fullDayList.add(sdf.format(ca.getTime()));
            ca.add(Calendar.DAY_OF_MONTH,1);
            //星期
            Locale.setDefault(Locale.CHINA);
            String[] dayStringOfWeek = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
            int d = ca.get(Calendar.DAY_OF_WEEK);
            String day=sdf.format(ca.getTime())+dayStringOfWeek[d-1];
            map.put("time", day);
            for (Object value : map.values()) {
                System.out.println(value);
            }
        }
        return map;
    }
    public static void main(String[] args){
        Map<String, String> map=getDayOfYear();
    }