两个OffsetDateTime之间的天数(包括小数

import java.time.OffsetDateTime;
import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime dateTime1 = OffsetDateTime.parse("2022-01-01T00:00:00+00:00");
        OffsetDateTime dateTime2 = OffsetDateTime.parse("2022-01-03T12:00:00+00:00");

        long timestamp1 = dateTime1.toInstant().toEpochMilli();
        long timestamp2 = dateTime2.toInstant().toEpochMilli();

        long millisecondsDiff = timestamp2 - timestamp1;
        double daysDiff = (double) millisecondsDiff / (24 * 60 * 60 * 1000);
        daysDiff = Math.round(daysDiff * 100) / 100.0;

        System.out.println("两个OffsetDateTime之间的天数为：" + daysDiff);
    }
}