Java计算日期和时间差

这篇文章将使用两个例子计算两个日期的时间差。
1.使用Java SDK。
2.使用Joda库。
1.使用Java SDK
 计算两个Date之间的时间差,基本思路为把Date转换为ms(微秒),然后计算两个微秒时间差。时间的兑换规则如下:

1s秒 = 1000ms毫秒 1min分种 = 60s秒 1hours小时 = 60min分钟 1day天 = 24hours小时
package com.qiyadeng.date;

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

public class DateDifferentExample {
    public static void main(String[] args) {
        String dateStart = "2013-02-19 09:29:58";
        String dateStop = "2013-02-20 11:31:48";

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        Date d1 = null;
        Date d2 = null;

        try {
            d1 = format.parse(dateStart);
            d2 = format.parse(dateStop);

            //毫秒ms
            long diff = d2.getTime() - d1.getTime();

            long diffSeconds = diff / 1000 % 60;
            long diffMinutes = diff / (60 * 1000) % 60;
            long diffHours = diff / (60 * 60 * 1000) % 24;
            long diffDays = diff / (24 * 60 * 60 * 1000);

            System.out.print("两个时间相差:");
            System.out.print(diffDays + " 天, ");
            System.out.print(diffHours + " 小时, ");
            System.out.print(diffMinutes + " 分钟, ");
            System.out.print(diffSeconds + " 秒.");

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

  

运行结果:

两个时间相差:1 天, 2 小时, 1 分钟, 50 秒.

2.Joda时间库

使用 joda-time-1.6.2 jar包  资源连接地址:http://www.java2s.com/Code/Jar/j/Downloadjodatime162jar.htm

package util;

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

import org.joda.time.DateTime;
import org.joda.time.Days;
import org.joda.time.Hours;
import org.joda.time.Minutes;
import org.joda.time.Seconds;

public class TimeDiffUtil {
	
	public Integer getTimeDifference(String time) {
		SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String endTime = time;
		String nowDate = date.format(new Date());
		Date now = null;
		Date end = null ;
		try {
			now = date.parse(nowDate);
			end = date.parse(endTime);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return Days.daysBetween(new DateTime(end), new DateTime(now)).getDays();
	}
	
	public static void main(String[] args) throws ParseException  {
	  System.out.println(new TimeDiffUtil().getTimeDifference("2015-01-01 00:00:00"));
		

  /**以下内容被放在getTimeDifference()方法中*/
	  /*String dateStart = "2013-02-19 09:29:58";
          String dateStop = "2015-01-01 11:31:48";

          SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
          dateStart = date.format(new Date());

          Date d1 = null;
          Date d2 = null;

          try {
              d1 = date.parse(dateStart);
              d2 = date.parse(dateStop);

              DateTime dt1 = new DateTime(d1);
              DateTime dt2 = new DateTime(d2);

              System.out.print("两个时间相差:");
              System.out.print(-Days.daysBetween(dt1, dt2).getDays() + " 天, ");
              System.out.print(Hours.hoursBetween(dt1, dt2).getHours() % 24 + " 小时, ");
              System.out.print(Minutes.minutesBetween(dt1, dt2).getMinutes() % 60 + " 分钟, ");
              System.out.print(Seconds.secondsBetween(dt1, dt2).getSeconds() % 60 + " 秒.");

          } catch (Exception e) {
              e.printStackTrace();
          }*/
	}

}

  

运行结果:

两个时间相差:1 天, 2 小时, 1 分钟, 50 秒.
原文地址:https://www.cnblogs.com/a757956132/p/4208415.html