<?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:context="http://www.springframework.org/schema/context"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

           http://www.springframework.org/schema/context

           http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <context:annotation-config />

  <bean id="u2" class="com.bjsxt.dao.impl.UserDAOImpl">

  </bean>

  <bean id="userService" class="com.bjsxt.service.UserService" >

  </bean>

</beans>

package com.bjsxt.service;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import com.bjsxt.dao.UserDAO;

import com.bjsxt.model.User;

public class UserService {

    private UserDAO userDAO;  

    public void init() {

        System.out.println("init");

    }

    public void add(User user) {

        userDAO.save(user);

    }

    public UserDAO getUserDAO() {

        return userDAO;

    }

    @Resource   //默认按名字 找不到UserDao的话，名称找不到，按类型

    public void setUserDAO( UserDAO userDAO) {

        this.userDAO = userDAO;

    }

    public void destroy() {

        System.out.println("destroy");

    }

}

    @Test

    public void testAdd() throws Exception {

        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");

        UserService service = (UserService)ctx.getBean("userService");

        service.add(new User());

        ctx.destroy();

    }

package com.bjsxt.dao.impl;

import org.springframework.stereotype.Component;

import com.bjsxt.dao.UserDAO;

import com.bjsxt.model.User;

@Component("u")

public class UserDAOImpl implements UserDAO {

    public void save(User user) {

        //Hibernate

        //JDBC

        //XML

        //NetWork

        System.out.println("user saved!");

    }

}

package com.bjsxt.service;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.stereotype.Component;

import com.bjsxt.dao.UserDAO;

import com.bjsxt.model.User;

@Component("userService")

public class UserService {

    private UserDAO userDAO;  

    public void init() {

        System.out.println("init");

    }

    public void add(User user) {

        userDAO.save(user);

    }

    public UserDAO getUserDAO() {

        return userDAO;

    }

    @Resource(name="u")

    public void setUserDAO( UserDAO userDAO) {

        this.userDAO = userDAO;

    }

    public void destroy() {

        System.out.println("destroy");

    }

}

<?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:context="http://www.springframework.org/schema/context"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

           http://www.springframework.org/schema/context

           http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <context:annotation-config />

    <context:component-scan base-package="com.bjsxt"/>          //挨着盘在这下面的包找

</beans>

@Test

    public void testAdd() throws Exception {

        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");

        UserService service = (UserService)ctx.getBean("userService");

        service.add(new User());

        ctx.destroy();

    }

package com.bjsxt.service;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.stereotype.Component;

import com.bjsxt.dao.UserDAO;

import com.bjsxt.model.User;

@Component("userService")

public class UserService {

    private UserDAO userDAO;  

    @PostConstruct

    public void init() {

        System.out.println("init");

    }

    public void add(User user) {

        userDAO.save(user);

    }

    public UserDAO getUserDAO() {

        return userDAO;

    }

    @Resource(name="u")

    public void setUserDAO( UserDAO userDAO) {

        this.userDAO = userDAO;

    }

    @PreDestroy

    public void destroy() {

        System.out.println("destroy");

    }

}