public class DateTimeUtil
{
    public static DateTime parse(string year,string month,string day,string hour,string minute,string second)
    {
        int yearInt = Convert.ToInt32(year);
        int monthInt = Convert.ToInt32(month);
        int dayInt = Convert.ToInt32(day);
        int hourInt = Convert.ToInt32(hour);
        int minuteInt = Convert.ToInt32(minute);
        int secondInt = Convert.ToInt32(second);
        return new DateTime(yearInt, monthInt,dayInt,hourInt,minuteInt,secondInt);
    }

    public static DateTime parse(string hour, string minute, string second)
    {
        DateTime now = DateTime.Now;
        int hourInt = Convert.ToInt32(hour);
        int minuteInt = Convert.ToInt32(minute);
        int secondInt = Convert.ToInt32(second);
        return new DateTime(now.Year, now.Month, now.Day, hourInt, minuteInt, secondInt);
    }
    public static DateTime parse(int hour, int minute, int second)
    {
        DateTime now = DateTime.Now;
        return new DateTime(now.Year, now.Month, now.Day, hour, minute, second);
    }
    /// <summary>
    /// 传入时间，格式 HH:mm:ss
    /// </summary>
    /// <param name="time"></param>
    /// <returns></returns>
    public static DateTime parse(string time)
    {
        string[] timeArr = time.Split(':');
        DateTime now = DateTime.Now;
        int hourInt = Convert.ToInt32(timeArr[0]);
        int minuteInt = Convert.ToInt32(timeArr[1]);
        int secondInt = Convert.ToInt32(timeArr[2]);
        return new DateTime(now.Year, now.Month, now.Day, hourInt, minuteInt, secondInt);
    }
}