学习资料笔记

java 两个时间字符串的时间差

2021-7-27 小木 Java

import java.text.DateFormat; 
import java.text.ParseException; 
import java.text.SimpleDateFormat; 
import java.util.Date;

public class DateDistance {

    /**
     * 两个时间之间相差距离多少天
     *
     * @param startTimeStr 开始时间
     * @param endTimeStr   结束时间
     * @return 相差天数
     */
    public static long getDistanceDays(String startTimeStr, String endTimeStr) throws Exception {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date startDate;
        Date endDate;
        long days = 0;
        try {
            startDate = format.parse(startTimeStr);
            endDate = format.parse(endTimeStr);
            long time1 = startDate.getTime();
            long time2 = endDate.getTime();
            long diff;
            if (time1 < time2) {
                diff = time2 - time1;
            } else {
                diff = time1 - time2;
            }
            days = diff / (1000 * 60 * 60 * 24);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return days;
    }

    /**
     * 两个时间相差距离多少天多少小时多少分多少秒
     *
     * @param startTimeStr 开始时间 格式：2000-01-01 12:00:00
     * @param endTimeStr   结束时间 格式：2021-01-01 12:00:00
     * @return long[] 返回值为：{天, 时, 分, 秒}
     */
    public static long[] getDistanceTimes(String startTimeStr, String endTimeStr) {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date startDate;
        Date endDate;
        long day = 0;
        long hour = 0;
        long min = 0;
        long sec = 0;
        try {
            startDate = format.parse(startTimeStr);
            endDate = format.parse(endTimeStr);
            long time1 = startDate.getTime();
            long time2 = endDate.getTime();
            long diff;
            if (time1 < time2) {
                diff = time2 - time1;
            } else {
                diff = time1 - time2;
            }
            day = diff / (24 * 60 * 60 * 1000);
            hour = (diff / (60 * 60 * 1000) - day * 24);
            min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
            sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        long[] times = {day, hour, min, sec};
        return times;
    }

    /**
     * 两个时间相差距离多少天多少小时多少分多少秒
     *
     * @param startTimeStr 开始时间 格式：2000-01-01 12:00:00
     * @param endTimeStr   结束时间 格式：2021-01-01 12:00:00
     * @return String 返回值为：xx天xx小时xx分xx秒
     */
    public static String getDistanceTime(String startTimeStr, String endTimeStr) {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date startDate;
        Date endDate;
        long day = 0;
        long hour = 0;
        long min = 0;
        long sec = 0;
        try {
            startDate = format.parse(startTimeStr);
            endDate = format.parse(endTimeStr);
            long time1 = startDate.getTime();
            long time2 = endDate.getTime();
            long diff;
            if (time1 < time2) {
                diff = time2 - time1;
            } else {
                diff = time1 - time2;
            }
            day = diff / (24 * 60 * 60 * 1000);
            hour = (diff / (60 * 60 * 1000) - day * 24);
            min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
            sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return day + "天" + hour + "小时" + min + "分" + sec + "秒";
    }
}

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