三种获取当天剩余时间的简洁方式是什么_剩余天数计算

三种获取当天剩余时间的简洁方式，分别使用DateUtils、DateTime和 LocalDateTime

import org.apache.commons.lang.time.DateUtils;
import org.joda.time.DateTime;
import org.joda.time.Duration;
import org.junit.Test;


import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;


/**
* Created by Administrator on 2016/12/12.
*/
public class TimeTest {


    @Test
    public void getTime() {


        //方法一
        long milliSecondsLeftToday =  - DateUtils.getFragmentInMilliseconds(Calendar.getInstance(), Calendar.DATE);
        long secondsLeftToday = 86400 - DateUtils.getFragmentInSeconds(Calendar.getInstance(), Calendar.DATE);
        System.out.println("当天剩余毫秒1：" + milliSecondsLeftToday);
        System.out.println("当天剩余秒1：" + secondsLeftToday);




        //方法二
        DateTime dateTime = new DateTime().millisOfDay().withMaximumValue();
        long millSeconds2 = new Duration(new DateTime(), dateTime).getMillis();
        long count = new Duration(new DateTime(), dateTime).getStandardSeconds();
        System.out.println("当天剩余毫秒2：" + millSeconds2);
        System.out.println("当天剩余秒2：" + count);




        //方法三:LocalDateTime和ChronoUnit为1.8新增
        LocalDateTime midnight = LocalDateTime.now().plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
        long millSeconds = ChronoUnit.MILLIS.between(LocalDateTime.now(),midnight);
        long seconds = ChronoUnit.SECONDS.between(LocalDateTime.now(), midnight);
        System.out.println("当天剩余毫秒3：" + millSeconds);
        System.out.println("当天剩余秒3：" + seconds);


    }
}

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