public class DateTools {

    /** The DAT e_ forma t1. */

    public static String DATE_FORMAT1 = "yyyy-MM-dd HH:mm:ss";

/**

     * 获取两个时间段的交集

     * @param s1

     * @param e1

     * @param s2

     * @param e2

     * @return

     */

    public static Map<String, LocalDateTime> getOverlapDuration(LocalDateTime s1,LocalDateTime e1,LocalDateTime s2,LocalDateTime e2){

        Map<String, LocalDateTime> localDateTimeMap = new HashMap<>();

        //是否有交集

        long s1InMillis = Timestamp.valueOf(s1).getTime();

        long e1InMillis = Timestamp.valueOf(e1).getTime();

        long s2InMillis = Timestamp.valueOf(s2).getTime();

        long e2InMillis = Timestamp.valueOf(e2).getTime();

        long overlapStartTime = ;

        long overlapEndTime = ;

        if((s1InMillis>=s2InMillis&&s1InMillis<=e2InMillis)

                ||(e1InMillis>=s2InMillis&&e1InMillis<=e2InMillis)){

            overlapStartTime = s1InMillis>=s2InMillis?s1InMillis:s2InMillis;

            overlapEndTime = e1InMillis<=e2InMillis?e1InMillis:e2InMillis;

        }

        LocalDateTime start = LocalDateTime.ofInstant(Instant.ofEpochMilli(overlapStartTime), ZoneId.systemDefault());

        LocalDateTime end = LocalDateTime.ofInstant(Instant.ofEpochMilli(overlapEndTime), ZoneId.systemDefault());

        localDateTimeMap.put("start", start);

        localDateTimeMap.put("end" , end);

        return localDateTimeMap;

    }

}