Design Pattern 9-strategy

原创于 2004-09-25 17:22:00 发布 · 1.5k 阅读

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#string #class #system

博客展示了策略模式的代码实现。定义了抽象类strategy及两个具体实现类repA和repB，分别实现不同替换逻辑。通过创建实例设置旧字符串、执行替换操作并输出新字符串，体现策略模式的应用。

using System;

namespace Pattern
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public abstract class strategy
{
  protected string m_oldstr="";
  protected string m_newstr="";
  public void setOldString(string oldstr)
  {
   this.m_oldstr =oldstr;
  }
  public string getNewString()
  {
   return this.m_newstr;
  }
  public abstract void replace();

}

public class repA:strategy
{
  public repA()
  {
  }
  public override void replace()
  {
   this.m_newstr =this.m_oldstr+"aaaa";
  }

}

public class repB:strategy
{
  public repB()
  {
  }
  public override void replace()
  {
   this.m_newstr =this.m_oldstr+"bbbb";
  }

}
}
// 策略模式
//      strategy r1=new repA();
//      r1.setOldString("good");
//      r1.replace();
//      Console.WriteLine(r1.getNewString());
   //
   //   repB r2=new repB();
   //   r2.setOldString("good");
   //   r2.replace();
   //   Console.WriteLine(r2.getNewString());