为了跟其他日期工具类进行区分起名字DateTools

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
     
       getOverlapDuration(LocalDateTime s1,LocalDateTime e1,LocalDateTime s2,LocalDateTime e2){        Map
      
        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 = 0;        long overlapEndTime = 0;        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;    }}