Java 8 获取某天最大(23:59:59)最小(00:00:00)时间

向右看齐 2021-12-23 14:55 973阅读 0赞

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import java.text.SimpleDateFormat;
    import java.time.Instant;
    import java.time.LocalDateTime;
    import java.time.LocalTime;
    import java.time.ZoneId;
    import java.util.Date;
     
    public class GetMaxMinTime {
    	public static void main(String[] args) {
    		Date date = new Date();
    		
    		System.out.println("今天开始时间：" + getStartOfDay(date));
    		System.out.println("今天结束时间：" + getEndOfDay(date));
    		
    		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		
    		System.out.println(sdf.format(getStartOfDay(date)));
    		System.out.println(sdf.format(getEndOfDay(date)));
    		
    	}
    	
    	// 获得某天最大时间 2017-10-15 23:59:59
    	public static Date getEndOfDay(Date date) {
    		LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.systemDefault());;
    		LocalDateTime endOfDay = localDateTime.with(LocalTime.MAX);
    		return Date.from(endOfDay.atZone(ZoneId.systemDefault()).toInstant());
    	}
    	
    	// 获得某天最小时间 2017-10-15 00:00:00
    	public static Date getStartOfDay(Date date) {
    		LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.systemDefault());
    		LocalDateTime startOfDay = localDateTime.with(LocalTime.MIN);
    		return Date.from(startOfDay.atZone(ZoneId.systemDefault()).toInstant());
    	}
     
    }

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转载于:https://my.oschina.net/u/3771868/blog/1841433

[80_]: https://my.oschina.net/u/2663968/blog/3051541
[hot3.png]: /images/20211223/96bef5acb4874cd99a38701e8b1990cf.png
[Center]: /images/20211223/91899ba30a45404aaa66cd91a7ee471a.png