C#实现毫秒转换成时分秒的方法

public static String formatLongToTimeStr(Long l) {
    String str = "";
    int hour = 0;
    int minute = 0;
    int second = 0;
    second = l.intValue() / 1000;
 
    if (second > 60) {
      minute = second / 60;
      second = second % 60;
    }
    if (minute > 60) {
      hour = minute / 60;
      minute = minute % 60;
    }
    return (hour.toString() + "小时" + minute.toString() + "分钟"
        + second.toString() + "秒");
}