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[源码下载]
乐在其中设计模式(C#) - 建造者模式(Builder Pattern)
作者:webabcd
介绍
将一个复杂对象的构建与它的表示分离,使得同样的构建过程可以创建不同的表示。
示例
用同样的构建过程创建Sql和Xml的Insert()方法和Get()方法。
MessageModel
using System;
using System.Collections.Generic;
using System.Text;
namespace Pattern.Builder
{
/// <summary>
/// Message实体类
/// </summary>
public class MessageModel
{
/// <summary>
/// 构造函数
/// </summary>
/// <param name="msg">Message内容</param>
/// <param name="pt">Message发布时间</param>
public MessageModel(string msg, DateTime pt)
{
this._message = msg;
this._publishTime = pt;
}
private string _message;
/// <summary>
/// Message内容
/// </summary>
public string Message
{
get { return _message; }
set { _message = value; }
}
private DateTime _publishTime;
/// <summary>
/// Message发布时间
/// </summary>
public DateTime PublishTime
{
get { return _publishTime; }
set { _publishTime = value; }
}
}
}
using System.Collections.Generic;
using System.Text;
namespace Pattern.Builder
{
/// <summary>
/// Message实体类
/// </summary>
public class MessageModel
{
/// <summary>
/// 构造函数
/// </summary>
/// <param name="msg">Message内容</param>
/// <param name="pt">Message发布时间</param>
public MessageModel(string msg, DateTime pt)
{
this._message = msg;
this._publishTime = pt;
}
private string _message;
/// <summary>
/// Message内容
/// </summary>
public string Message
{
get { return _message; }
set { _message = value; }
}
private DateTime _publishTime;
/// <summary>
/// Message发布时间
/// </summary>
public DateTime PublishTime
{
get { return _publishTime; }
set { _publishTime = value; }
}
}
}
SqlMessage
using System;
using System.Collections.Generic;
using System.Text;
namespace Pattern.Builder
{
/// <summary>
/// Sql方式操作Message
/// </summary>
public class SqlMessage
{
/// <summary>
/// 获取Message
/// </summary>
/// <returns></returns>
public List<MessageModel> Get()
{
List<MessageModel> l = new List<MessageModel>();
l.Add(new MessageModel("SQL方式获取Message", DateTime.Now));
return l;
}
/// <summary>
/// 插入Message
/// </summary>
/// <param name="mm">Message实体对象</param>
/// <returns></returns>
public bool Insert(MessageModel mm)
{
// 代码略
return true;
}
}
}
using System.Collections.Generic;
using System.Text;
namespace Pattern.Builder
{
/// <summary>
/// Sql方式操作Message
/// </summary>
public class SqlMessage
{
/// <summary>
/// 获取Message
/// </summary>
/// <returns></returns>
public List<MessageModel> Get()
{
List<MessageModel> l = new List<MessageModel>();
l.Add(new MessageModel("SQL方式获取Message", DateTime.Now));
return l;
}
/// <summary>
/// 插入Message
/// </summary>
/// <param name="mm">Message实体对象</param>
/// <returns></returns>
public bool Insert(MessageModel mm)
{
// 代码略
return true;
}
}
}
XmlMessage
using System;
using System.Collections.Generic;
using System.Text;
namespace Pattern.Builder
{
/// <summary>
/// Xml方式操作Message
/// </summary>
public class XmlMessage
{
/// <summary>
/// 获取Message
/// </summary>
/// <returns></returns>
public List<MessageModel> Get()
{
List<MessageModel> l = new List<MessageModel>();
l.Add(new MessageModel("XML方式获取Message", DateTime.Now));
return l;
}
/// <summary>
/// 插入Message
/// </summary>
/// <param name="mm">Message实体对象</param>
/// <returns></returns>
public bool Insert(MessageModel mm)
{
// 代码略
return true;
}
}
}
using System.Collections.Generic;
using System.Text;
namespace Pattern.Builder
{
/// <summary>
/// Xml方式操作Message
/// </summary>
public class XmlMessage
{
/// <summary>
/// 获取Message
/// </summary>
/// <returns></returns>
public List<MessageModel> Get()
{
List<MessageModel> l = new List<MessageModel>();
l.Add(new MessageModel("XML方式获取Message", DateTime.Now));
return l;
}
/// <summary>
/// 插入Message
/// </summary>
/// <param name="mm">Message实体对象</param>
/// <returns></returns>
public bool Insert(MessageModel mm)
{
// 代码略
return true;
}
}
}
Operation
using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
namespace Pattern.Builder
{
/// <summary>
/// 操作(Product)
/// </summary>
public class Operation
{
private string _type;
private Dictionary<string, string> _dictionary;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="type">产品类型</param>
public Operation(string type)
{
_dictionary = new Dictionary<string, string>();
this._type = type;
}
/// <summary>
/// 索引器
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public string this[string key]
{
get { return _dictionary[key]; }
set { _dictionary[key] = value; }
}
/// <summary>
/// 获得结果
/// </summary>
/// <returns></returns>
public string GetResult()
{
Assembly assembly = Assembly.Load("Pattern.Builder");
MethodInfo methodGet = assembly.GetType("Pattern.Builder." + _dictionary["get"].Split('|')[0]).GetMethod(_dictionary["get"].Split('|')[1]);
object objGet = methodGet.Invoke(assembly.CreateInstance("Pattern.Builder." + _dictionary["get"].Split('|'
using System.Collections.Generic;
using System.Text;
using System.Reflection;
namespace Pattern.Builder
{
/// <summary>
/// 操作(Product)
/// </summary>
public class Operation
{
private string _type;
private Dictionary<string, string> _dictionary;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="type">产品类型</param>
public Operation(string type)
{
_dictionary = new Dictionary<string, string>();
this._type = type;
}
/// <summary>
/// 索引器
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public string this[string key]
{
get { return _dictionary[key]; }
set { _dictionary[key] = value; }
}
/// <summary>
/// 获得结果
/// </summary>
/// <returns></returns>
public string GetResult()
{
Assembly assembly = Assembly.Load("Pattern.Builder");
MethodInfo methodGet = assembly.GetType("Pattern.Builder." + _dictionary["get"].Split('|')[0]).GetMethod(_dictionary["get"].Split('|')[1]);
object objGet = methodGet.Invoke(assembly.CreateInstance("Pattern.Builder." + _dictionary["get"].Split('|'