例如：要取2019-01 到 2020-06之間的所有月份

/**獲取兩月之間的所有月份*/
    public static List<String> getMonthBetween(String minDate, String maxDate){
        ArrayList<String> result = new ArrayList<String>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");//格式化為年月

        Calendar min = Calendar.getInstance();
        Calendar max 
 
= Calendar.getInstance();

        try{
            min.setTime(sdf.parse(minDate));
            min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);

            max.setTime(sdf.parse(maxDate));
            max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);
        }catch (Exception e){
            
 
throw new SSCException("分解月份出錯");//注意：丟擲的型別是自定義的
        }

        Calendar curr = min;
        while (curr.before(max)) {
            result.add(sdf.format(curr.getTime()));
            curr.add(Calendar.MONTH, 1);
        }
        min = null;max = null;curr = null;
        return result;
    }