在使用Unity的时候,能够很好的解耦,解除层与层之间的依赖性。这里有一个问题,每次向Unity中要对象实例的时候,这时候给出的是同一个吗?还是每次都是new一个新的?我来写代码验证一下。怎么验证两个对象是否为同一个呢,看这个对象在内存中的地址就行了,通过Hash码查看就可以。
namespace UnityApplication { public interface IService { string Show(); } } namespace UnityApplication { public class Service : IService { public Service() { Console.WriteLine("<<<<<<<<<<<<<<"); } public string Show() { return "Hello"; } } } namespace UnityApplication { class Program { static void Main(string[] args) { IUnityContainer container = CreateUnityContainerExe(); IService service = container.Resolve<IService>(); string result = service.Show(); Console.WriteLine("''''''''''" + result + "llllllll" + service.GetHashCode()); IService service2 = container.Resolve<IService>(); Console.WriteLine("lllllllllll" + service2.GetHashCode()); Console.ReadLine(); } public static IUnityContainer CreateUnityContainerExe() { return CreateUnityContainer(ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)); } private static IUnityContainer CreateUnityContainer(Configuration configuration) { return InitializeContainer(configuration); } private static IUnityContainer InitializeContainer(Configuration configuration) { var result = new UnityContainer(); foreach (var section in configuration.Sections) { var unityConfigurationSection = section as UnityConfigurationSection; if (unityConfigurationSection != null) { result.LoadConfiguration(unityConfigurationSection); } } return result; } } }
需要在配置文件中,配置相应的类与映射关系
<?xml version="1.0"?> <configuration> <configSections> <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration"/> </configSections> <unity> <container> <register type="UnityApplication.IService, UnityApplication" mapTo="UnityApplication.Service, UnityApplication"> </register> </container> </unity> <startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/> </startup> </configuration>
最终运行的时候,你会发现控制台输出的哈希地址根本就是不一样的,说明不是同一个实例,对象的地址根本不同,每次都会new一个新的。
验证Unity依赖注入的对象是否为同一个实例
时间: 2024-10-12 17:37:56