获取两个日期字符串之间的所有天数

Posted 2022-09-14 tank073

一、获取两个日期字符串中间的天：

public static List<String> getDaysBetweenTwoDays(String startDay,String endDay) throws ParseException 
        List<String> list = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");//格式化为年月
        Calendar min = Calendar.getInstance();
        Calendar max = Calendar.getInstance();
        min.setTime(sdf.parse(startDay));
        min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), min.get(Calendar.DATE),0,0,0);
        max.setTime(sdf.parse(endDay));
        max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), max.get(Calendar.DATE),23,59,59);
        Calendar curr = min;
        while (curr.before(max)) 
            list.add(sdf.format(curr.getTime()));
            curr.add(Calendar.DATE, 1);
        
        return list;
    

 

二、获取两个日期字符串之间的月份

/**
     * @description 获取两个日期之间的月份
     * @author tank
     * @date 2019/8/24 16:47
     *
     * @param minDate
     * @param maxDate
     * @return java.util.List<java.lang.String>
     */
    public static List<String> getMonthBetween(String minDate, String maxDate) throws ParseException 
        ArrayList<String> result = new ArrayList<String>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");//格式化为年月
        Calendar min = Calendar.getInstance();
        Calendar max = Calendar.getInstance();
        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);
        Calendar curr = min;
        while (curr.before(max)) 
            result.add(sdf.format(curr.getTime()));
            curr.add(Calendar.MONTH, 1);
        
        return result;