LocalDateTime相关处理，得到零点以及24点值，最近五分钟点位，与Date互转，时间格式

 最近一直使用LocalDateTime，老是忘记怎么转换，仅此记录一下

1import java.time.Instant;
2import java.time.LocalDateTime;
3import java.time.LocalTime;
4import java.time.ZoneId;
5import java.time.format.DateTimeFormatter;
6import java.util.Date;
7
8public class Test {
9
10    public static void main(String[] args) {
11        LocalDateTime now = LocalDateTime.now();
12        System.out.println("当前时间:  "+now);
13        
14        //时间格式
15        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
16        System.out.println("formate: "+ now.format(formatter));
17        
18        //当天的零点
19        System.out.println("当天的零点:  "+LocalDateTime.of(now.toLocalDate(), LocalTime.MIN));
20        
21        //当天的最后时间
22        System.out.println("当天的最后时间:  "+LocalDateTime.of(now.toLocalDate(), LocalTime.MAX));
23        
24        //最近的五分钟点位
25        Integer minute = now.getMinute();
26        minute = minute/5*5;
27        System.out.println("最近的五分钟点位:  "+LocalDateTime.of(now.getYear(), now.getMonth(), now.getDayOfMonth(), now.getHour(), minute, 0));
28        
29        //Date转为LocalDateTime
30        Date date = new Date();
31        Instant instant = date.toInstant();
32        ZoneId zoneId = ZoneId.systemDefault();
33        System.out.println("Date转为LocalDateTime: "+instant.atZone(zoneId).toLocalDateTime());
34    }
35
36}