Java时间的转换

        String DATE_FORMAT = "yyyy-MM-dd";
        LocalDate localDate = LocalDate.now();
        long startTime = localDate.atTime(0, 0, 0).toEpochSecond(ZoneOffset.of("+8"));
        long endTime = localDate.plusDays(1).atTime(0, 0, 0).toEpochSecond(ZoneOffset.of("+8")) - 1;
        String result = localDate.format(DateTimeFormatter.ofPattern(DATE_FORMAT));
        System.out.println(result);
        System.out.println(startTime);
        System.out.println(endTime);
        System.out.println("*******************");

        Date date = new Date();
        SimpleDateFormat df = new SimpleDateFormat(DATE_FORMAT);
        String time = df.format(date);
        System.out.println(df.parse(time).getTime());

　

运行结果：

2019-02-13
1549987200
1550073599
*******************
1549987200000