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我们处于东8时区
对时间戳先加8小时,再做减去取余值,再减去8小时即可
对一天取余 得到 2021-04-02 00:00:00:000import java.text.SimpleDateFormat;import java.util.Date;public class Test { public static void main(String[] args) { Date date=new Date(); date.setTime(date.getTime()+TimeUnits.hour*8); date.setTime(date.getTime()-(date.getTime()%(TimeUnits.day))); date.setTime(date.getTime()-TimeUnits.hour*8); SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:sss"); System.out.println(simpleDateFormat.format(date)); }}
public interface TimeUnits { long second = 1000; long minute = second * 60; long hour = minute * 60; long day = hour * 24; long week = day * 7; long month = day * 30; long year = day * 365;}
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