<bean id="personAction" class="com.lee.spring008.IOC.DI.MVC.PersonAction">
        <property name="stuService" ref="stuService"></property>
    </bean>
    <bean id="stuService" class="com.lee.spring008.IOC.DI.MVC.StuServiceImpl">
        <property name="stuDAO" ref="stuDAO"></property>
    </bean>
    <bean id="stuDAO" class="com.lee.spring008.IOC.DI.MVC.StuDAOImpl"></bean>

IStuDAO.java

1 package com.lee.spring008.IOC.DI.MVC;
2 
3 public interface IStuDAO {
4     public void saveStu();
5 }

IStuService.java

1 package com.lee.spring008.IOC.DI.MVC;
2 
3 public interface IStuService {
4     public void saveStu();
5 }

PersonAction.java

```package com.lee.spring008.IOC.DI.MVC;

public class StuDAOImpl implements IStuDAO {

    @Override
    public void saveStu() {
        System.out.println("dao: saving stu...");
    }

}

StuServiceImpl.java

package com.lee.spring008.IOC.DI.MVC;

public class StuServiceImpl implements IStuService {

    public IStuDAO stuDAO;

    @Override
    public void saveStu() {
        System.out.println("service: saving stu...");
        stuDAO.saveStu();
    }

    public IStuDAO getStuDAO() {
        return stuDAO;
    }

    public void setStuDAO(IStuDAO stuDAO) {
        this.stuDAO = stuDAO;
    }

}

测试：

1 @Test
2     public void testPersonAction() {
3         ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
4         PersonAction person = (PersonAction)context.getBean("personAction");
5         person.displaySave();
6     }