java8 关于日期的处理

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;

public class Test {

    public static void main(String[] args) {
        
        //获取当前的时区
        ZoneId zone=ZoneId.systemDefault();
        //java8 获取当前时间
        LocalDateTime today = LocalDateTime.now();
        //获取前一天的当前时间
        LocalDateTime yesterday = today.minusDays(1);
        Date date=null;
        //LocalDateTime转化为Date
        date=Date.from(today.atZone(zone).toInstant());
        //Date转化为LocalDateTime
        today= LocalDateTime.ofInstant(date.toInstant(),zone);
               
    }
}