【spring教程之三】在构造器中注入新类

1、在构造器中注入新类和在构造器中注入基本参数类似，主要是修改xml里面的配置。

2、核心spring.xml文件

  <bean id="do" class="com.test.pro.Student">
  	<constructor-arg value="19"></constructor-arg>
  	<constructor-arg ref="read"></constructor-arg><!-- 这里是用构造器注入新类 -->
  </bean>
  
  <bean id="read" class="com.test.pro.Reading">
  </bean>

3、Reading.java

package com.test.pro;

public class Reading {
	public void doing()
	{
		System.out.println("我在读书......");
	}
}

package com.test.pro;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ApplicationContext ctx=new ClassPathXmlApplicationContext("spring.xml");
		Student did=(Student)ctx.getBean("do");
		did.speaking();
		
	}

}

【spring教程之三】在构造器中注入新类

原文：http://blog.csdn.net/itbuluoge/article/details/44492393