设计模式之抽象工厂模式(AbstractFactory)

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本文介绍抽象工厂模式的概念及其在.NET中的实现方式。通过具体代码示例展示了如何使用抽象工厂模式来创建一系列相关或相互依赖的对象，同时保持代码的灵活性和扩展性。

抽象工厂模式(Abstract Factory)：提供一个创建一系列相关或相互依赖对象的接口，而无需指定它们具体的类。

Abstract1.cs

代码

using System;
using System.Collections.Generic;
using System.Text;

//抽象工厂模式(Abstract Factory)：提供一个创建一系列相关或相互依赖对象的接口
//，而无需指定它们具体的类。
namespace AbstractFactory
{
    class Abstract1
    {
           
    }

    class Department
    {
        private int _id;
        public int ID
        {
            get { return _id; }
            set { _id = value; }
        }
        private string _deptName;
        public string DeptName
        {
            get { return _deptName; }
            set { _deptName = value; }
        }
    }

    interface IDepartment
    {
        void Insert(Department department);

        Department GetDepartment(int id);
    }

    class SqlserverDepartment : IDepartment
    {
        public void Insert(Department department)
        {
            Console.WriteLine("在SQL Server中给Department表增加一条记录");
        }

        public Department GetDepartment(int id)
        {
            Console.WriteLine("在SQL Server中根据ID得到Department表一条记录");
            return null;
        }
    }

    class AccessDepartment : IDepartment
    {
        public void Insert(Department department)
        {
            Console.WriteLine("在Access中给Department表增加一条记录");
        }

        public Department GetDepartment(int id)
        {
            Console.WriteLine("在Access中根据ID得到Department表一条记录");
            return null;
        }
    }

    interface IFactory
    {
        IDepartment CreateDepartment();
    }

    class SqlserverFactory : IFactory
    {
        public IDepartment CreateDepartment()
        {
            return new SqlserverDepartment();
        }
    }

    class AccessFactory : IFactory
    {
        public IDepartment CreateDepartment()
        {
            return new AccessDepartment();
        }
    }
}

Program.cs

代码

using System;
using System.Collections.Generic;
using System.Text;

namespace AbstractFactory
{
    class Program
    {
        static void Main(string[] args)
        {
            Department dept = new Department();

            IFactory factory = new AccessFactory();

            IDepartment id = factory.CreateDepartment();
            id.Insert(dept);
            id.GetDepartment(1);

            Console.Read();
        }
    }
}