（1）

package com.orzjiangxiaoyu.spring.test1;

/**
 * @author orz
 * @create 2020-08-16 20:55
 */
public interface UserDao {
    public void  add();
}

package com.orzjiangxiaoyu.spring.test1;

import org.springframework.stereotype.Repository;

/**
 * @author orz
 * @create 2020-08-16 20:55
 */
@Repository(value 
 
= "userDaoImpl1")
public class UserDaoImpl implements UserDao {
    @Override
    public void add() {
        System.out.println("userDaoImpl1 add");
    }
}

package com.orzjiangxiaoyu.spring.test1;

import org.springframework.stereotype.Repository;

/**
 * @author orz
 * @create 2020-08-16 20:55
 */
@Repository(value 
 
= "userDaoImpl1")
public class UserDaoImpl implements UserDao {
    @Override
    public void add() {
        System.out.println("userDaoImpl1 add");
    }
}

package com.orzjiangxiaoyu.spring.test1;

import org.springframework.stereotype.Repository;

/**
 * @author orz
 * @create 2020-08-16 21:17
 */
@Repository(value 
 
= "userDaoImpl2")
public class UserDaoImpl2 implements UserDao{
    @Override
    public void add() {
        System.out.println("userDaoImpl2  add");
    }
}

package com.orzjiangxiaoyu.spring.test1;

import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;

/**
 * @author orz
 * @create 2020-08-16 22:29
 */
@Repository
public class Userdao2 {
    public void add()
    {
        System.out.println("userdao2 add");
    }
}

package com.orzjiangxiaoyu.spring.test1;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @author orz
 * @create 2020-08-16 17:27
 */
//註解裡面value屬性值可以省略不寫
//預設值是類名稱，首字母小寫
//UserService-userService

@Service(value = "userService") //<bean id="userService" class="..."></bean>
public class UserService {

    //根據名稱進行注入
    @Resource(name = "userDaoImpl1")
    private UserDao dao;

    @Resource(name = "userDaoImpl2")
    private UserDao dao2;

    //根據型別進行注入
    @Resource
    private Userdao2 userdao2;

    public void add()
    {

        System.out.println("service add ...");
        dao.add();
        dao2.add();
        userdao2.add();
    }
}

（2）

<?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"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 開始元件掃面   -->
    <!-- 1.如果掃描多個包，多個包使用逗號隔開
         2.掃描包上層目錄
     -->
    <context:component-scan base-package="com.orzjiangxiaoyu.spring"></context:component-scan>
    
</beans>

（3）

package com.orzjiangxiaoyu.spring.test1;

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


/**
 * @author orz
 * @create 2020-08-16 17:06
 */
public class Test1 {
    @Test
    public void test1()
    {
        //1.載入spring配置檔案
        ApplicationContext context=new ClassPathXmlApplicationContext("bean1.xml");
        //2.獲取配置檔案的建立物件
        UserService userService = context.getBean("userService", UserService.class);
        userService.add();

    }
}

（4）

service add ...
userDaoImpl1 add
userDaoImpl2  add
userdao2 add