有没有工具类，计算2个日期相差分钟数

是的，有很多编程语言都提供了计算2个日期相差分钟数的工具类或函数。以下是几种语言的示例：

Java:

import java.util.concurrent.TimeUnit;
import java.time.Duration;
import java.time.LocalDateTime;

public class DateUtils {
    public static long getMinutesBetween(LocalDateTime start, LocalDateTime end) {
        Duration duration = Duration.between(start, end);
        return duration.toMinutes();
    }
}

Python:

from datetime import datetime

def get_minutes_between(start, end):
    duration = end - start
    minutes = int(duration.total_seconds() / 60)
    return minutes

JavaScript:

function getMinutesBetween(start, end) {
  const duration = end - start;
  const minutes = Math.floor(duration / (1000 * 60));
  return minutes;
}

C#:

using System;

public class DateUtils {
    public static int GetMinutesBetween(DateTime start, DateTime end) {
        TimeSpan duration = end - start;
        return (int)duration.TotalMinutes;
    }
}

注意，这些示例中的日期格式可能会因语言和使用情况而异。