C#实现工作日和休息日(包括法定节假日)的计算

来源:互联网 发布:matlab 雅可比矩阵 编辑:程序博客网 时间:2024/06/06 04:42

一、开发背景:

  最近在公司开发的系统中,需要计算工作日,就是给出一个采购周期(n天),我需要计算出在n个工作日之后的日期。开始准备去调接口(ps:找了半天发现没有太合适的,还有吐槽下国家政府单位都没有官方接口的),但是负责这个项目的大佬说,万一别个的接口崩了,会影响我们自己的系统的正常运行,自己开发还是稳点,我就写了这个功能,特此记录下实现这个功能的思路。

二、定义:

  工作日想必大家都知道,就是除去周末和每年国务院颁布的节假日放假安排(例如:2017年部分节假日安排),其他就都是工作日(对了,差点忘记补班,这也算是工作日哦)。

三、实践:

  “废话”说的够多了,下面撸起袖子开干吧,代码都写了注释。

  提供了两个公共方法,先给大家看下简单测试的运行结果:

    (1).根据传入的工作日天数,获得计算后的日期

    

    (2).根据传入的时间,计算工作日天数;

    

  具体代码:

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public class HolidayHelper
    {
        #region 字段属性
        private static object _syncObj = new object();
        private static HolidayHelper _instance { getset; }
        private static List<DateModel> cacheDateList { getset; }
        private HolidayHelper() { }
        /// <summary>
        /// 获得单例对象,使用懒汉式(双重锁定)
        /// </summary>
        /// <returns></returns>
        public static HolidayHelper GetInstance()
        {
            if (_instance == null)
            {
                lock (_syncObj)
                {
                    if (_instance == null)
                    {
                        _instance = new HolidayHelper();
                    }
                }
            }
            return _instance;
        }
        #endregion
 
        #region 私有方法
        /// <summary>
        /// 读取文件
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        private string GetFileContent(string filePath)
        {
            string result = "";
            if (File.Exists(filePath))
            {
                result = File.ReadAllText(filePath);
            }
            return result;
        }
        /// <summary>
        /// 获取配置的Json文件
        /// </summary>
        /// <returns>经过反序列化之后的对象集合</returns>
        private List<DateModel> GetConfigList()
        {
            string path = string.Format("{0}/../../Config/holidayConfig.json", System.AppDomain.CurrentDomain.BaseDirectory);
            string fileContent = GetFileContent(path);
            if (!string.IsNullOrWhiteSpace(fileContent))
            {
                cacheDateList = Newtonsoft.Json.JsonConvert.DeserializeObject<List<DateModel>>(fileContent);
            }
            return cacheDateList;
        }
        /// <summary>
        /// 获取指定年份的数据
        /// </summary>
        /// <param name="year"></param>
        /// <returns></returns>
        private DateModel GetConfigDataByYear(int year)
        {
            if (cacheDateList == null)//取配置数据
                GetConfigList();
            DateModel result = cacheDateList.FirstOrDefault(m => m.Year == year);
            return result;
        }
        /// <summary>
        /// 判断是否为工作日
        /// </summary>
        /// <param name="currDate">要判断的时间</param>
        /// <param name="thisYearData">当前的数据</param>
        /// <returns></returns>
        private bool IsWorkDay(DateTime currDate, DateModel thisYearData)
        {
            if (currDate.Year != thisYearData.Year)//跨年重新读取数据
            {
                thisYearData = GetConfigDataByYear(currDate.Year);
            }
            if (thisYearData.Year > 0)
            {
                string date = currDate.ToString("MMdd");
                int week = (int)currDate.DayOfWeek;
 
                if (thisYearData.Work.IndexOf(date) >= 0)
                {
                    return true;
                }
 
                if (thisYearData.Holiday.IndexOf(date) >= 0)
                {
                    return false;
                }
 
                if (week != 0 && week != 6)
                {
                    return true;
                }
            }
            return false;
        }
 
        #endregion
 
        #region 公共方法
        public void CleraCacheData()
        {
            if (cacheDateList != null)
            {
                cacheDateList.Clear();
            }
        }
        /// <summary>
        /// 根据传入的工作日天数,获得计算后的日期,可传负数
        /// </summary>
        /// <param name="day">天数</param>
        /// <param name="isContainToday">当天是否算工作日(默认:true)</param>
        /// <returns></returns>
        public DateTime GetReckonDate(int day, bool isContainToday = true)
        {
            DateTime currDate = DateTime.Now;
            int addDay = day >= 0 ? 1 : -1;
 
            if (isContainToday)
                currDate = currDate.AddDays(-addDay);
 
            DateModel thisYearData = GetConfigDataByYear(currDate.Year);
            if (thisYearData.Year > 0)
            {
                int sumDay = Math.Abs(day);
                int workDayNum = 0;
                while (workDayNum < sumDay)
                {
                    currDate = currDate.AddDays(addDay);
                    if (IsWorkDay(currDate, thisYearData))
                        workDayNum++;
                }
            }
            return currDate;
        }
        /// <summary>
        /// 根据传入的时间,计算工作日天数
        /// </summary>
        /// <param name="date">带计算的时间</param>
        /// <param name="isContainToday">当天是否算工作日(默认:true)</param>
        /// <returns></returns>
        public int GetWorkDayNum(DateTime date, bool isContainToday = true)
        {
            var currDate = DateTime.Now;
 
            int workDayNum = 0;
            int addDay = date.Date > currDate.Date ? 1 : -1;
 
            if (isContainToday)
            {
                currDate = currDate.AddDays(-addDay);
            }
 
            DateModel thisYearData = GetConfigDataByYear(currDate.Year);
            if (thisYearData.Year > 0)
            {
                bool isEnd = false;
                do
                {
                    currDate = currDate.AddDays(addDay);
                    if (IsWorkDay(currDate, thisYearData))
                        workDayNum += addDay;
                    isEnd = addDay > 0 ? (date.Date > currDate.Date) : (date.Date < currDate.Date);
                while (isEnd);
            }
            return workDayNum;
        }
        #endregion
    }
 
    public struct DateModel
    {
        public int Year { getset; }
 
        public List<string> Work { getset; }
 
        public List<string> Holiday { getset; }
    }

  说明下,法定节假日我是自己用json来配置的,大家可以自己维护,或者做成自己的接口。下面展示下json的格式,这是我自己配置的(2015-2017年),大家可以按照自己的需求来修改。

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[
  {
    "Year""2015",
    "Work": [ "0104""0215""0228""0906""1010" ],
    "Holiday": [ "0101""0102""0103""0218""0219""0220""0221""0222""0223""0224""0404""0405""0406""0501""0502""0503""0620""0621""0622""0903""0904""0905""0927""1001""1002""1003""1004""1005""1006""1007" ]
  },
  {
    "Year""2016",
    "Work": [ "0206""0214""0612""0918""1008""1009" ],
    "Holiday": [ "0101""0207""0208""0209""0210""0211""0212""0213""0404""0501""0502""0609""0610""0611""0915""0916""0917""1001""1002""1003""1004""1005""1006""1007" ]
  },
  {
    "Year""2017",
    "Work": [ "0122""0204""0401""0527""0930" ],
    "Holiday": [ "0101""0102""0127""0128""0129""0130""0201""0202""0501""0529""0530""1001""1002""1003""1004""1005""1006" ]
  }
]
 
holidayConfig.json