Spring.NET依赖注入 - 制作可替换的算法

< configuration >
   < configSections >
     < sectionGroup  name ="spring" >
       < section  name ="context"  type ="Spring.Context.Support.ContextHandler, Spring.Core" />
       < section  name ="objects"  type ="Spring.Context.Support.DefaultSectionHandler, Spring.Core"   />
     </ sectionGroup >
   </ configSections >

   < spring >
     < context >
       < resource  uri ="config://spring/objects" />
     </ context >
    
     < objects >
       <!--  Default Implement  -->
       < object  name ="algHello"  type ="CsharpTrainer.Strategy.Hello.EngHello, CsharpTrainer.Strategy" >
       </ object >
       <!--  Extended Implement  -->
       <!-- <object name="algHello" type="CsharpTrainer.Strategy.Hello.ChnHello, CsharpTrainer.Strategy">
      </object> -->
     </ objects >
   </ spring >

  ...
</ configuration >

public  interface IStrategy
    {
         void Execute();
    }

public  class EngHello : IStrategy
    {
         public  void Execute()
        {
            Console.WriteLine( " Hello, World! ");
        }
    }

public  class ChnHello : IStrategy
    {
         public  void Execute()
        {
            Console.WriteLine( " 你好, 世界! ");
        }
    }

public  class HelloAlgorithm
    {
         public  static  void SayHello()
        {
             // 从config文件中取得程序集信息
            IApplicationContext context = ConfigurationManager.GetSection( " spring/context ")  as IApplicationContext;

             // 调用方法
            IStrategy alg = context.GetObject( " algHello ")  as IStrategy;
            alg.Execute();
        }