Spring.NET依赖注入(二) - 对象的注入

public  interface IDeviceWriter
    {
         void saveToDevice();
    }

public  class FloppyWriter : IDeviceWriter
    {
         public  void saveToDevice() 
        {
            Console.WriteLine( " 储存至软盘… ");
        }
    }

public  class UsbDiskWriter : IDeviceWriter
    {
         public  void saveToDevice() 
        {
            Console.WriteLine( " 储存至移动硬盘… ");
        }
    }

public  class MemoryDevice
    {
         public IDeviceWriter DeviceWriter {  get;  set; }

         public  void Save()
        {
             if (DeviceWriter ==  null)
            {
                 throw  new Exception( " 需要设备... ");
            }

            DeviceWriter.saveToDevice();
        }
    }

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

                 // 调用方法
                MemoryDevice device = context.GetObject( " algDevice ")  as MemoryDevice;
                device.Save();
            }
             catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }

class SpringDeviceTest : ITestCase
    {
         public  void Run()
        {
            DeviceComponent.SaveDevice();

            Console.Read();
        }
    }

< 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 >
     ...
      < object  id ="algFloppy"  type ="CsharpTrainer.Strategy.Device.FloppyWriter, CsharpTrainer.Strategy"   />
       < object  id ="algUsb"  type ="CsharpTrainer.Strategy.Device.UsbDiskWriter, CsharpTrainer.Strategy"   />
       < object  id ="algDevice"  type ="CsharpTrainer.Strategy.Device.MemoryDevice, CsharpTrainer.Strategy" >
         < property  name ="DeviceWriter"  ref ="algFloppy"   />
         <!-- <property name="DeviceWriter" ref="algUsb" /> -->
       </ object >
     </ objects >
   </ spring >
  ...
</ configuration >