java实现两个日期的时间差

喜欢ヅ旅行 2022-05-16 10:16 251阅读 0赞

package com.yu.bai.date;
    
    import java.util.Calendar;
    import java.util.Date;
    
    public class TestDate2 {
    
        public static void main(String[] args) {
            //创建一个日期
            Calendar calendar = Calendar.getInstance();
            calendar.add(Calendar.DAY_OF_MONTH, -3);
            Date date = calendar.getTime();
            System.out.println(date);//此时获取的是当前时间往前推三天的日期
    
            //调用方法，获得两个日期之间的时间差
            double days = getDistanceTime(date,new Date());
            System.out.println(days);
        }
    
        //计算时间差，以天数为单位。如：2018-08-08 和 2018-08-05 相差3天 
        public static int getDistanceTime(Date startTime, Date endTime) {
            int days = 0;
            long time1 = startTime.getTime();
            long time2 = endTime.getTime();
    
            long diff;
            if (time1 < time2) {
                diff = time2 - time1;
            } else {
                diff = time1 - time2;
            }
            days = (int) (diff / (24 * 60 * 60 * 1000));
            return days;
        }
    
        //计算时间差，以小时为单位。如：2018-08-08 和 2018-08-07 相差24h 
        public double getDistanceTime2(Date startTime, Date endTime) {
            double hour = 0;
            long time1 = startTime.getTime();
            long time2 = endTime.getTime();
    
            long diff;
            if (time1 < time2) {
                diff = time2 - time1;
            } else {
                diff = time1 - time2;
            }
            hour = (diff / (60 * 60 * 1000));
            return hour;
        }
    }