某天开始时间和结束时间

男娘i 2023-06-09 07:57 41阅读 0赞

import org.joda.time.DateTime;
    
    import java.io.*;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.TimeZone;
    
    public class Test { 
    
        public static void main(String[] args) { 
            Test test = new Test();
            Long baseTime = DateUtil.convertStrToDate("2010-01-01 00:00:00:000",DateUtil.DATE_TIME_FULL_DIVISION).getTime();
            Date tmp = DateUtil.convertStrToDate("2019-01-03 10:00:00:000",DateUtil.DATE_TIME_FULL_DIVISION);
            long start = System.currentTimeMillis();
            for (int i = 0; i < 1; i++) { 
                System.out.println(DateUtil.convertDateToStr(test.getStartTimeOfDay(tmp),DateUtil.DATE_TIME_DIVISION));
                System.out.println(DateUtil.convertDateToStr(test.getStartTimeOfDay(tmp,baseTime),DateUtil.DATE_TIME_DIVISION));
                System.out.println(DateUtil.convertDateToStr(test.getEndTimeOfDay(tmp),DateUtil.DATE_TIME_FULL_DIVISION));
            }
            System.out.println("耗时："+(System.currentTimeMillis()-start));
        }
        /** * 获取一天的开始时间, * 默认基准时间2000-01-01 00:00:00:000 * @param date 某一天时间 * @return 某一天的开始时间,比如2005-01-01 00:00:00.000 */
        public long getStartTimeOfDay(Date date) { 
            if(date == null){ 
                date = new Date();
            }
            return this.getStartTimeOfDay(date,null);
        }
        /** * 获取一天的开始时间,如果自己指定基准时间，请注意时区问题， * 推荐使用@see getStartTimeOfDay(Date date) * @param date 某一天时间 * @return 某一天的开始时间,比如2005-01-01 00:00:00.000 */
        public long getStartTimeOfDay(Date date,Long baseTime){ 
            if(date == null){ 
                date = new Date();
            }
            if(baseTime == null){ 
                //默认基准时间2000-01-01 00:00:00:000
                baseTime = DateUtil.convertStrToDate("2000-01-01 00:00:00:000",DateUtil.DATE_TIME_FULL_DIVISION).getTime();
            }
            long interval = date.getTime()-baseTime;
            return interval/(86400000)*(86400000)+baseTime;
        }
        /** * 获取一天的最后时间点 * @param date 某一天时间 * @return 某一天的结束时间，比如2005-01-01 23:59:59.999 */
        public long getEndTimeOfDay(Date date) { 
            if(date == null){ 
                date = new Date();
            }
            return this.getStartTimeOfDay(date)+86400000-1;
        }
    }