设计模式之抽象工厂(一)
一。组成部分
1.抽象工厂----担任这个角色的是工厂方法模式的核心,它是与应用系统商业逻辑无关的。
2.具体工厂----这个角色直接在客户端的调用下创建产品的实例。这个角色含有选择合适的产品对象的逻辑,而这个逻辑是与应用系统的商业逻辑紧密相关的。
3.抽象产品----担任这个角色的类是工厂方法模式所创建的对象的父类,或它们共同拥有的接口。
4.具体产品----抽象工厂模式所创建的任何产品对象都是某一个具体产品类的实例。这是客户端最终需要的东西,其内部一定充满了应用系统的商业逻辑。
5.用户----用户通过抽象工厂和抽象产品选择自己所需要的具体产品
二。UML类图
![](https://www.cnblogs.com/images/cnblogs_com/morningwang/007.jpg)
三。代码
1.抽象工厂----担任这个角色的是工厂方法模式的核心,它是与应用系统商业逻辑无关的。
2.具体工厂----这个角色直接在客户端的调用下创建产品的实例。这个角色含有选择合适的产品对象的逻辑,而这个逻辑是与应用系统的商业逻辑紧密相关的。
3.抽象产品----担任这个角色的类是工厂方法模式所创建的对象的父类,或它们共同拥有的接口。
4.具体产品----抽象工厂模式所创建的任何产品对象都是某一个具体产品类的实例。这是客户端最终需要的东西,其内部一定充满了应用系统的商业逻辑。
5.用户----用户通过抽象工厂和抽象产品选择自己所需要的具体产品
二。UML类图
![](https://www.cnblogs.com/images/cnblogs_com/morningwang/007.jpg)
三。代码
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Pattern
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{
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public class AbstratcFactory
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{
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public static void Main(string[] args)
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{
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AbstractSql delete = new SqlServer();
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ClientUser user1 = new ClientUser(delete);
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user1.Show();
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AbstractSql insert = new Oracle();
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ClientUser user2 = new ClientUser(insert);
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user2.Show();
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}
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}
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//抽象工厂类
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public abstract class AbstractSql
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{
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public abstract AbstractInsert Insert();
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public abstract AbstractDelete Delete();
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}
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//具体工厂[SqlServer]
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public class SqlServer:AbstractSql
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{
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public override AbstractInsert Insert()
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{
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return new SqlServerInsert();
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}
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public override AbstractDelete Delete()
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{
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return new SqlServerDelete();
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}
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}
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//具体工厂[Oracle]
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public class Oracle:AbstractSql
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{
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public override AbstractInsert Insert()
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{
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return new OracleInsert();
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}
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public override AbstractDelete Delete()
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{
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return new OracleDelete();
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}
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}
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//抽象产品[Insert]
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public abstract class AbstractInsert
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{ }
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//抽象产品[Delete]
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public abstract class AbstractDelete
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{
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public abstract void Interact(AbstractInsert insert);
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}
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//具体产品1[SqlServerInsert]
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public class SqlServerInsert : AbstractInsert
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{ }
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//具体产品1[OracleInsert]
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public class OracleInsert : AbstractInsert
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{ }
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//具体产品2[SqlServerDelete]
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public class SqlServerDelete : AbstractDelete
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{
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public override void Interact(AbstractInsert insert)
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{
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Console.WriteLine(this.GetType().Name + " interacts with: " + insert.GetType().Name);
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}
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}
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//具体产品2[OracleDelete]
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public class OracleDelete : AbstractDelete
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{
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public override void Interact(AbstractInsert insert)
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{
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Console.WriteLine(this.GetType().Name + " interacts with: " + insert.GetType().Name);
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}
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}
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//用户
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public class ClientUser
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{
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private AbstractInsert AbstractInsert;
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private AbstractDelete AbstractDelete;
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public ClientUser(AbstractSql sql)
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{
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AbstractInsert = sql.Insert();
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AbstractDelete = sql.Delete();
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}
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public void Show()
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{
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AbstractDelete.Interact(AbstractInsert);
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}
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}
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}
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