LocalDateTime 两个字符串时间的均值

可以先将两个字符串时间转换为 LocalDateTime 对象，然后计算它们的时间戳的平均值，最后再将平均值转换为 LocalDateTime 对象即可。

示例代码：

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        String time1 = "2022-01-01 12:00:00";
        String time2 = "2022-01-02 12:00:00";

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime dateTime1 = LocalDateTime.parse(time1, formatter);
        LocalDateTime dateTime2 = LocalDateTime.parse(time2, formatter);

        long timestamp1 = dateTime1.toEpochSecond(ZoneOffset.of("+8"));
        long timestamp2 = dateTime2.toEpochSecond(ZoneOffset.of("+8"));

        long avgTimestamp = (timestamp1 + timestamp2) / 2;

        LocalDateTime avgDateTime = LocalDateTime.ofEpochSecond(avgTimestamp, 0, ZoneOffset.of("+8"));

        System.out.println(avgDateTime.format(formatter)); // 输出：2022-01-02 00:00:00
    }
}