自己工资自己算，策略设计模式(Strategy)

Insus.NET在想，每在公司或是老板给自己发工资时，每个人都会重新计算一下自己的工资，是否正确。好象老板或是会计都会把自己的工资计错了似的。因此，每个都人都是工资计算高手。

工资计算，需要知道基本工资是多少; 否有加薪，加薪方式，是按基本工资的百分比来加，还是由得公司或是老板随心而加，表现加多些，表现不好加少一些；是否有加班，加班的方式也要清楚，工作天加班，普通假日加班，或是法定假日加班；是否有补帖等等。

每一种方式，在此也算得上是算法，完成的都是相同的工作，只是实现不同罢了。为了简化与分工，我们可以把每种算法写成一个独立的类，减少它们之间的耦合。

每个算法，返回一个结果，因此可以写一个抽象类，让每个算法类继承这个公共接口。

Wage

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for Wage
/// </summary>
namespace Insus.NET
{
    public abstract class Wage 
    {
        public abstract double Salary(double basicWage);
    }
}

具体算法，基本工资：

BasicWage

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for BasicWage
/// </summary>
namespace Insus.NET
{
    public class BasicWage :Wage 
    {
        public override double Salary(double basicWage)
        {
            return basicWage;
        }
    }
}

去年公司业务好，收入丰，因此今年有得加薪，每个员工都是按基本工资百分比来加薪：

PlusWage

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for PlusWage
/// </summary>
namespace Insus.NET
{
    public class PlusWage : Wage 
    {
        private double _Rate = 1d;
        
        public PlusWage(double rate)  //加工资百分比
        {
            this._Rate = rate;
        }

        public override double Salary(double basicWage)
        {
            return basicWage * _Rate;
        }
    }
}

今年沿续去年的业务，项目需要加班完成：

OvertimeWage

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for OvertimeWage
/// </summary>
namespace Insus.NET
{
    public class OvertimeWage : Wage
    {
        private double _Hours;
        private double _OverTimeHourlyWage;
        private bool _OfficialHoliday;   
        
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hours">加班小时数</param>
        /// <param name="rate">加班每小时工资</param>
        /// <param name="type">节假日，还是普通日</param>
        public OvertimeWage(double hours, double overTimeHourlyWage, bool officialHoliday) 
        {
            this._Hours = hours;
            this._OverTimeHourlyWage = overTimeHourlyWage;
            this._OfficialHoliday = officialHoliday;
        }

        public override double Salary(double basicWage)
        {
            double salary = _Hours * _OverTimeHourlyWage * basicWage;

            if (_OfficialHoliday)
               salary = salary * 3;

            return salary;           
        }
    }
}

 

更加多的公司福利算法....

接下来，为了上面各个算法引用，用一个WageContext类来处理：

WageContext

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for WageContext
/// </summary>
namespace Insus.NET
{
    public class WageContext
    {
        private Wage _Wage;

        public WageContext(string type)
        {
            switch (type)
            {
                case "基本工资":
                    _Wage = new BasicWage();
                    break;
                case "加工资":
                    _Wage = new PlusWage(0.10);
                    break;
                case "加班工资":
                    _Wage = new OvertimeWage(2, 10, true);
                    break;
            }
        }

        public double GetSalary(double basicWage)
        {
            return _Wage.Salary(basicWage);
        }
    }
}

OK,我们来看看这新年后第一个月薪水，公司在加薪，又有加班。

WageDemo.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;

public partial class WageDemo : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {       
        //"基本工资"
        //"加工资"
        //"加班工资"
        
        double basicWage = 8000d;

        double total = 0.0d;
        WageContext bw = new WageContext("基本工资");
        total = bw.GetSalary(basicWage);


        WageContext pw = new WageContext("加工资");
        double plusSalary = pw.GetSalary(basicWage);       
        total = total + plusSalary;

        Response.Write(total.ToString());
    }
}

哈哈，有劳所获，开心一下子就行了，继续努力......