/**

     * 获取当前时间的时间戳

     */

    public static int getCurrentTimeIntValue() {

        return (int) (System.currentTimeMillis() / 1000);

    }

    /**

     * 获取days天后的当前时间 时间戳

     */

    public static int addDaysTimeStamp(int days) {

        Calendar cal = Calendar.getInstance();

        cal.setTime(new Date());

        cal.add(Calendar.DATE, days);

        return (int) (cal.getTimeInMillis() / 1000);

    }

    /**

     * 获取今日零点的时间戳

     */

    public static int getStartTimeStamp() {

        Calendar todayStart = Calendar.getInstance();

        todayStart.set(Calendar.HOUR_OF_DAY, 0);

        todayStart.set(Calendar.MINUTE, 0);

        todayStart.set(Calendar.SECOND, 0);

        todayStart.set(Calendar.MILLISECOND, 0);

        long time = todayStart.getTimeInMillis()/1000;

        return (int)time;

    }

    /**

     * 获取今日23：59：59的时间戳

     */

    public static int getEndTimeStamp() {

        Calendar todayEnd = Calendar.getInstance();

        todayEnd.set(Calendar.HOUR_OF_DAY, 23);

        todayEnd.set(Calendar.MINUTE, 59);

        todayEnd.set(Calendar.SECOND, 59);

        todayEnd.set(Calendar.MILLISECOND, 999);

        long time = todayEnd.getTimeInMillis() / 1000;

        return (int) time;

    }

    /**

     * 获取指定时间零点的时间戳

     */

    public static int getStartTimeStamp(Date date) {

        Calendar todayStart = Calendar.getInstance();

        todayStart.setTime(date);

        todayStart.set(Calendar.HOUR_OF_DAY, 0);

        todayStart.set(Calendar.MINUTE, 0);

        todayStart.set(Calendar.SECOND, 0);

        todayStart.set(Calendar.MILLISECOND, 0);

        long time = todayStart.getTimeInMillis()/1000;

        return (int)time;

    }

    /**

     * 获取指定时间23：59：59的时间戳

     */

    public static int getEndTimeStamp(Date date) {

        Calendar todayEnd = Calendar.getInstance();

        todayEnd.setTime(date);

        todayEnd.set(Calendar.HOUR_OF_DAY, 23);

        todayEnd.set(Calendar.MINUTE, 59);

        todayEnd.set(Calendar.SECOND, 59);

        todayEnd.set(Calendar.MILLISECOND, 999);

        long time = todayEnd.getTimeInMillis() / 1000;

        return (int) time;

    }

    /**

     * 获取昨天零点的时间（字符串）

     */

    public static String getYesterDayStartTimeStamp() {

        SimpleDateFormat sdfYMD = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        Calendar calendar = Calendar.getInstance();

        calendar.set(Calendar.SECOND,0); //这是将【秒】设置为0

        calendar.set(Calendar.MINUTE,0); //这是将【分】设置为0

        calendar.set(Calendar.HOUR_OF_DAY,0); //这是将【时】设置为0

        calendar.add(Calendar.DATE,-1); //当前日期加一

        String yesterday  = sdfYMD.format(calendar.getTime()); //获取昨天的时间 如2021-02-25 00:00:00

        return yesterday;

    }

    /**

     * 获取昨天零点的时间戳

     */

    public static Integer getBeforeStartTime(){

        Calendar todayStart = Calendar.getInstance();

        todayStart.set(Calendar.HOUR_OF_DAY, 0);

        todayStart.set(Calendar.MINUTE, 0);

        todayStart.set(Calendar.SECOND, 0);

        todayStart.set(Calendar.MILLISECOND, 0);

        long time = todayStart.getTimeInMillis()/1000;

        return (int)time-86400;

    }

    /**

     * 获取昨天23:59:59的时间（字符串）

     */

    public static String getYesterDayEndTimeStamp() {

        SimpleDateFormat sdfYMD = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        Calendar calendar = Calendar.getInstance();

        calendar.set(Calendar.SECOND,59); //这是将当天的【秒】设置为0

        calendar.set(Calendar.MINUTE,59); //这是将当天的【分】设置为0

        calendar.set(Calendar.HOUR_OF_DAY,23); //这是将当天的【时】设置为0

        calendar.add(Calendar.DATE,-1); //当前日期加一

        String yesterday  = sdfYMD.format(calendar.getTime()); //获取第二天的时间 2021-02-25 00:00:00

        return yesterday;

    }

    /**

     * 获取明天零点的时间戳

     */

    public static Integer getAfterStartime()

    {

        Calendar todayStart = Calendar.getInstance();

        todayStart.set(Calendar.HOUR_OF_DAY, 0);

        todayStart.set(Calendar.MINUTE, 0);

        todayStart.set(Calendar.SECOND, 0);

        todayStart.set(Calendar.MILLISECOND, 0);

        long time = todayStart.getTimeInMillis()/1000;

        return (int)time+86400;

    }

    /**

     * 将昨天凌晨时间转换为Date类型（下面设置成这样 new simpleDateFormat("yyyy-MM-dd HH:mm:ss") 数据中对应的字段类型就是DateTime）
　　　* 这个方法中调用了上面的getYesterDayStartTimeStamp()方法哦

     */

    public static Date getDateTime()

    {

        Date dateTime = null;

        String yesterDayStartTimeStamp =  DateUtil.getYesterDayStartTimeStamp();

        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        try

        {

            dateTime = formatter.parse(yesterDayStartTimeStamp);

        }

        catch (ParseException e)

        {

            e.printStackTrace();

        }

        //Sun May 09 00:00:00 CST 2021

        return dateTime;

    }
 

   /**

     * @param begin 开始时间

     * @param end 结束时间

     * 获取begin - end 时间段内的每一天的日期 比如获取 2021-4-15到2021-5-10内每一天的日期

     */

    public static List<String> getDayBetweenDates(String begin, String end) throws ParseException

    {

        SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");

        Date dBegin = sd.parse(begin); //将字符串参数转为Date类型 比如参数为 "2021-4-14" 将其转为Date类型

        Date dEnd = sd.parse(end);

        List<String> lDate = new ArrayList<>(); //创建集合, 存储begin - end 时间段内的时间

        lDate.add(sd.format(dBegin));

        Calendar calBegin = Calendar.getInstance();

        calBegin.setTime(dBegin);

        Calendar calEnd = Calendar.getInstance();

        calEnd.setTime(dEnd);

        while (dEnd.after(calBegin.getTime()))

        {

            calBegin.add(Calendar.DAY_OF_MONTH, 1);

            lDate.add(sd.format(calBegin.getTime()));

        }

        return lDate;

    }