ChronoUnit 计算日期时间差（java用法）_chronounit.days.between

        LocalDateTime today = LocalDateTime.now();
        LocalDateTime birthDate = LocalDateTime.of(2000, 05, 31, 0, 0, 0, 0);
 
        "相差的年数: "  ChronoUnit.YEARS.between(birthDate,today);
        "相差的月数: "  ChronoUnit.MONTHS.between(birthDate,today);
        "相差的周数: "  ChronoUnit.WEEKS.between(birthDate,today);
        "相差的天数: "  ChronoUnit.DAYS.between(birthDate,today);
        "相差的时数: "  ChronoUnit.HOURS.between(birthDate, today);
        "相差的分数: "  ChronoUnit.MINUTES.between(birthDate, today);
        "相差的秒数: "  ChronoUnit.SECONDS.between(birthDate,today);
        "相差的毫秒数: "  ChronoUnit.MILLIS.between(birthDate,today);
        "相差的微秒数: "  ChronoUnit.MICROS.between(birthDate,today);
        "相差的纳秒数: "  ChronoUnit.NANOS.between(birthDate, today);
        "相差的半天数: "  ChronoUnit.HALF_DAYS.between(birthDate, today);
        "相差的十年数: "  ChronoUnit.DECADES.between(birthDate,today);
        "相差的世纪有年数: "  ChronoUnit.CENTURIES.between(birthDate,today);
        "相差的千年数: "  ChronoUnit.MILLENNIA.between(birthDate,today);
        "相差的纪元数: "  ChronoUnit.ERAS.between(birthDate,today);