Java如何获取日期中最接近的小时，分钟，秒？
本示例演示如何使用该DateUtils.round()方法获取日期的最近的小时，分钟和秒。
package org.nhooo.example.commons.lang;
import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.apache.commons.lang3.time.FastDateFormat;
import java.util.Calendar;
import java.util.Date;
public class DateRoundingDemo {
public static void main(String[] args) {
FastDateFormat formatter = DateFormatUtils.ISO_8601_EXTENDED_DATETIME_TIME_ZONE_FORMAT;
Date now = new Date();
System.out.println("now = " + formatter.format(now));
//获得最近的秒
Date nearestSecond = DateUtils.round(now, Calendar.SECOND);
System.out.println("nearestSecond = " + formatter.format(nearestSecond));
//取得最近的分钟
Date nearestMinute = DateUtils.round(now, Calendar.MINUTE);
System.out.println("nearestMinute = " + formatter.format(nearestMinute));
//取得最近的时间
Date nearestHour = DateUtils.round(now, Calendar.HOUR);
System.out.println("nearestHour = " + formatter.format(nearestHour));
}
}程序结果如下：
now = 2019-07-24T10:29:21+08:00 nearestSecond = 2019-07-24T10:29:22+08:00 nearestMinute = 2019-07-24T10:29:00+08:00 nearestHour = 2019-07-24T10:00:00+08:00
Maven依赖
<!-- https://search.maven.org/remotecontent?filepath=org/apache/commons/commons-lang3/3.9/commons-lang3-3.9.jar -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.9</version>
</dependency>