Java Data Type - 如何计算Java8中两个日期之间的天数

import static java.time.temporal.ChronoUnit.DAYS;

import java.time.LocalDate;
import java.time.Month;
import java.time.Period;
public class Main {
  public static void main(String[] argv) {
    LocalDate startEmployment = LocalDate.of(2010, Month.SEPTEMBER, 8);
    LocalDate today = LocalDate.now();
    Period period = startEmployment.until(today);
    System.out.println("period = " + period);
    long numberOfDays = startEmployment.until(today, DAYS);
    System.out.println("numberOfDays = " + numberOfDays);
  }
}