设计模式学习--工厂模式
1.概述
工厂模式根据提供给他的数据,返回一个可能类中的一个类的实例。
2.示例
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Reflection;
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namespace Factory
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{
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class Program
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{
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public static readonly string DAL = "OracleDAL";
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static void Main(string[] args)
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{
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IDAL dal = (IDAL)Assembly.Load("Factory").CreateInstance("Factory." + DAL);
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dal.DataAccess();
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Console.ReadKey();
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}
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}
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public interface IDAL
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{
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void DataAccess();
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}
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public class SqlServerDAL : IDAL
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{
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public void DataAccess()
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{
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Console.WriteLine("SqlServerDAL");
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}
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}
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public class OracleDAL : IDAL
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{
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public void DataAccess()
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{
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Console.WriteLine("OracleDAL");
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}
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}
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}
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