package action;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import service.TestIocService;

public class TestIocAction {
	private TestIocService testIocService; 
	
//	//1.依赖类，set方式注入
//	public void setTestIocService(TestIocService testIocService) {
//		this.testIocService = testIocService;
//	}
	
	//2.依赖类，构造器方式注入
	public TestIocAction(TestIocService testIocService) {
		this.testIocService = testIocService;
	}

	public void add(){
		testIocService.add();
	}
	
	public static void main(String[] args) {
		 //使用Spring的工厂将ioc容器中的对象取出  
		BeanFactory factory=new ClassPathXmlApplicationContext("applicationContext.xml");  
		TestIocAction test = (TestIocAction) factory.getBean("testIocAction");
		test.add();
	}
}　

package service;

import dao.TestIocDao;

public class TestIocService {
	private TestIocDao testIocDao;
	
//	//1.依赖类，set方式注入
//	public void setTestIocDao(TestIocDao testIocDao) {
//		this.testIocDao = testIocDao;
//	}
	
	//2.依赖类，构造器方式注入
	public TestIocService(TestIocDao testIocDao) {
		this.testIocDao = testIocDao;
	}
	
	public void add(){
		testIocDao.add();
	}

}

package dao;

public class TestIocDao {
	public void add(){
		System.out.println("Dao==>>向数据库添加数据");
	}
}

<?xml version="1.0" encoding="UTF-8"?>
 
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:cache="http://www.springframework.org/schema/cache" xmlns:p="http://www.springframework.org/schema/p"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-4.0.xsd
     http://www.springframework.org/schema/tx
     http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
     http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.0.xsd">
     
     <!-- action配置  -->
     <bean id="testIocAction" class="action.TestIocAction">
    	<!-- property代表是通过set方法注入,ref的值表示注入的内容-->  
     	<property  name="testIocService"  ref="testIocService"/>   
     </bean>
     
     <!-- service配置 -->
     <bean id="testIocService" class="service.TestIocService">
    	<!-- property代表是通过set方法注入,ref的值表示注入的内容-->  
     	<property  name="testIocDao"  ref="testIocDao"/>    
     </bean>
     
     <!-- dao配置 -->
     <bean id="testIocDao" class="dao.TestIocDao"></bean>
     
</beans>

<?xml version="1.0" encoding="UTF-8"?>
 
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:cache="http://www.springframework.org/schema/cache" xmlns:p="http://www.springframework.org/schema/p"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-4.0.xsd
     http://www.springframework.org/schema/tx
     http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
     http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.0.xsd">
     
     <!-- action配置  -->
     <bean id="testIocAction" class="action.TestIocAction">
    	<!--constructor-arg代表是通过构造函数注入,ref的值表示注入的内容-->  
    	<constructor-arg  ref="testIocService"/> 
     </bean>
     
     <!-- service配置 -->
     <bean id="testIocService" class="service.TestIocService">
    	<!--constructor-arg代表是通过构造函数注入,ref的值表示注入的内容-->  
    	<constructor-arg  ref="testIocDao"/>    
     </bean>
     
     <!-- dao配置 -->
     <bean id="testIocDao" class="dao.TestIocDao"></bean>
     
</beans>