构造函数注入

namespace SpringNetZhuru

{
  public  class Person
    {
      public string Name { get; set; }
      public int Age { get; set; }
      public Person Friend { get; set; }
    }

}

 

namespace SpringNetZhuru
{
    public class PersonDao
    {
        private Person argPerson;
        private int inPro;
        public PersonDao(Person argperson, int inPro)
        {
            this.argPerson = argperson;//参数argperson为配置文件中构造器name使用
            this.inPro = inPro;
        }
        public void get()
        {
            //构造函数注入的整行参数
            Console.WriteLine(string.Format("intPro:{0}", this.inPro));
            //构造函数注入的Person
            Console.WriteLine(string.Format("Person的Name:{0}", this.argPerson.Name));
            Console.WriteLine(string.Format("Person的age：{0}", this.argPerson.Age));
            //构造函数的注入的Person的Friend
            Console.WriteLine(String.Format("Person的Friend的Name:{0}", this.argPerson.Friend.Name));
            Console.WriteLine(String.Format("Person的Friend的Age:{0}", this.argPerson.Friend.Age));
            //构造函数 注入的Person的Friend的Friend
            Console.WriteLine(String.Format("Person的Friend的Friend的Name:{0}", this.argPerson.Friend.Friend.Name));
            Console.WriteLine(String.Format("Person的Friend的Friend的Age:{0}", this.argPerson.Friend.Friend.Age));
        }
    }
}

两个类：Person和PersonDao

构造函数注入和属性注入一样使用name,ref ,value

配置文件：

<?xml version="1.0" encoding="utf-8" ?>
<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 xmlns="http://www.springframework.net"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://www.springframework.net
              http://www.springframework.net/xsd/spring-objects.xsd">
      <description>一个简单的控制反转例子</description>     

      <object id="computer" type="SpringNetZhuru.NowPeopleTool,SpringNetZhuru"></object>
      <object id="nowpeople" type="SpringNetZhuru.NowPeople,SpringNetZhuru">
        <property name="Tool" ref="computer"></property>
      </object>

      <object id="person" type="SpringNetZhuru.Person,SpringNetZhuru">
        <property name="Name" value="danche"></property>
        <property name="Age" value="24"></property>
        <property name="Friend">
          <object type="SpringNetZhuru.Person,SpringNetZhuru">
            <property name="Name" value="tanyidan"></property>
            <property name="Age" value="24"></property>
            <property name="Friend" ref="person"></property>
          </object>
        </property>
      </object>
      //构造器注入
      <object id="persondao" type="SpringNetZhuru.PersonDao,SpringNetZhuru">
        <constructor-arg name="argperson" ref="person"></constructor-arg>//此处name为PersonDao构造函数的Person类型参数，而不是属性
        <constructor-arg name="inPro" value="1"></constructor-arg>//此处name为PersonDao构造函数的int 类型参数，而不是属性
      </object>
    </objects>

  </spring>
 
</configuration>

 

运行结果：