Java实现获取两个日期之间的所有日期的开始时间集合

/**
* 获取两个日期之间的所有日期的开始时间集合
* 返回Date的List
*/
public static List<Date> getBetweenDates(Date start, Date end){
   List<Date> result = new ArrayList<>();
   Calendar tempStart = Calendar.getInstance();
   tempStart.setTime(start);
   tempStart.add(Calendar.DAY_OF_YEAR,1);

   Calendar tempEnd = Calendar.getInstance();
   tempEnd.setTime(end);

   while (tempStart.before(tempEnd)){
       result.add(tempStart.getTime());
       tempStart.add(Calendar.DAY_OF_YEAR, 1);
   }
   return result;
}

//获取两个日期之间的所有日期的开始时间集合
Date beginDate = new Date();
beginDate.setTime(1652976000000L);  //2022-05-20 00:00:00
Date endDate = new Date();
endDate.setTime(1655654400000L);  //2022-06-20 00:00:00
System.out.println(getBetweenDates(beginDate, endDate));    //[Sat May 21 00:00:00 CST 2022, Sun May 22 00:00:00 CST 2022, Mon May 23 00:00:00 CST 2022, Tue May 24 00:00:00 CST 2022, Wed May 25 00:00:00 CST 2022, Thu May 26 00:00:00 CST 2022, Fri May 27 00:00:00 CST 2022, Sat May 28 00:00:00 CST 2022, Sun May 29 00:00:00 CST 2022, Mon May 30 00:00:00 CST 2022, Tue May 31 00:00:00 CST 2022, Wed Jun 01 00:00:00 CST 2022, Thu Jun 02 00:00:00 CST 2022, Fri Jun 03 00:00:00 CST 2022, Sat Jun 04 00:00:00 CST 2022, Sun Jun 05 00:00:00 CST 2022, Mon Jun 06 00:00:00 CST 2022, Tue Jun 07 00:00:00 CST 2022, Wed Jun 08 00:00:00 CST 2022, Thu Jun 09 00:00:00 CST 2022, Fri Jun 10 00:00:00 CST 2022, Sat Jun 11 00:00:00 CST 2022, Sun Jun 12 00:00:00 CST 2022, Mon Jun 13 00:00:00 CST 2022, Tue Jun 14 00:00:00 CST 2022, Wed Jun 15 00:00:00 CST 2022, Thu Jun 16 00:00:00 CST 2022, Fri Jun 17 00:00:00 CST 2022, Sat Jun 18 00:00:00 CST 2022, Sun Jun 19 00:00:00 CST 2022]    

/**
* 获取两个日期之间所有月份的集合
*/
public static List<Date> getBetweenMonth(Date start, Date end){
   List<Date> result = new ArrayList<>();
   Calendar tempStart = Calendar.getInstance();
   tempStart.setTime(start);
   tempStart.set(tempStart.get(Calendar.YEAR), tempStart.get(Calendar.MONTH), 1);
   Calendar tempEnd = Calendar.getInstance();
   tempEnd.setTime(end);
   tempEnd.set(tempEnd.get(Calendar.YEAR), tempEnd.get(Calendar.MONTH), 2);
   while (tempStart.before(tempEnd)){
       result.add(tempStart.getTime());
       tempStart.add(Calendar.MONTH,1);
   }
   return result;
}

System.out.println(getBetweenMonth(beginDate, endDate));    //[Sun May 01 00:00:00 CST 2022, Wed Jun 01 00:00:00 CST 2022]

    /**
     * 获取两个日期字符串之间的日期集合
     * @param startTime:String
     * @param endTime:String
     * @return list:yyyy-MM-dd
     */
    public static List<String> getBetweenDate(String startTime, String endTime){
        SimpleDateFormat sdf = new SimpleDateFormat(YMD);
        // 声明保存日期集合
        List<String> list = new ArrayList<String>();
        try {
            // 转化成日期类型
            Date startDate = sdf.parse(startTime);
            Date endDate = sdf.parse(endTime);
            //用Calendar 进行日期比较判断
            Calendar calendar = Calendar.getInstance();
            while (startDate.getTime()<=endDate.getTime()){
                // 把日期添加到集合
                list.add(sdf.format(startDate));
                // 设置日期
                calendar.setTime(startDate);
                //把日期增加一天
                calendar.add(Calendar.DATE, 1);
                // 获取增加后的日期
                startDate=calendar.getTime();
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return list;
    }

     /**
     * 获取两个日期之间所有的月份集合
     * @param startTime
     * @param endTime
     * @return：YYYY-MM
     */
    public static List<String> getMonthBetweenDate(String startTime, String endTime){
        SimpleDateFormat sdf = new SimpleDateFormat(YYYY_MM);
        // 声明保存日期集合
        List<String> list = new ArrayList<String>();
        try {
            // 转化成日期类型
            Date startDate = sdf.parse(startTime);
            Date endDate = sdf.parse(endTime);
            //用Calendar 进行日期比较判断
            Calendar calendar = Calendar.getInstance();
            while (startDate.getTime()<=endDate.getTime()){
                // 把日期添加到集合
                list.add(sdf.format(startDate));
                // 设置日期
                calendar.setTime(startDate);
                //把日期增加一天
                calendar.add(Calendar.MONTH, 1);
                // 获取增加后的日期
                startDate=calendar.getTime();
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return list;
    }