java_spring_依赖注入

IOC反转控制 PersonService属性 PersonDao personDao接受通过xml注入的对象 PersonDaoBean.  Person中save（）调用 PersonDaoBean中的add（）

package com.PersonDaoBean.test;

public interface PersonDao {

	public abstract void add();

}

package com.PersonDaoBean.test;

//依赖注入

public class PersonDaoBean implements PersonDao {

	@Override
	public void add(){
		System.out.println("PersonDaoBean执行。。。。。。。。。。。。。。。。。");
	}
}

package com.bean.www;

import com.PersonDaoBean.test.PersonDao;
import com.dao.bean.www.PersonServiceDao;

public class PersonServiceBean implements PersonServiceDao {

	//personDao接受PersonDaoBean注入的对象
	private PersonDao personDao;

	public PersonDao getPersonDao() {
		return personDao;
	}

	public void setPersonDao(PersonDao personDao) {
		this.personDao = personDao;
	}

	public void save() {
		personDao.add();
	}

}

<?xml version="1.0" encoding="UTF-8"?>
<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

	<bean id="personDao" class="com.PersonDaoBean.test.PersonDaoBean"></bean>

	<bean id="personService" class="com.bean.www.PersonServiceBean">
		<property name="personDao" ref="personDao"></property>
	</bean>

</beans>

package com.itcast.www;

import static org.junit.Assert.*;

import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.dao.bean.www.PersonServiceDao;

public class TestCaseDemo {

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
	}

	@Test
	public void instanceSpring() {

		ApplicationContext ctx = new ClassPathXmlApplicationContext(
				"applicationContext.xml");

		PersonServiceDao personService = (PersonServiceDao) ctx
				.getBean("personService");
		personService.save();

	}

}