<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.cnblog.gg</groupId>

    <artifactId>springTest</artifactId>

    <version>1.0-SNAPSHOT</version>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <spring.version>4.3.6.RELEASE</spring.version>

        <spring.junit>4.12</spring.junit>

        <springboot.version>1.5.1.RELEASE</springboot.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>${spring.junit}</version>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-test</artifactId>

            <version>${spring.version}</version>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>

package com.cnblog.gg;

public interface VedioPlayer {

    void play();

}

package com.cnblog.gg;

import org.springframework.stereotype.Component;

@Component("mp3")

public class Mp3Player implements VedioPlayer {

    @Override

    public void play()

    {

        System.out.println("I am mp3 player");

    }

}

package com.cnblog.gg;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

@Configuration

@ComponentScan

public class VedioPlayerConfig {

}

package com.cnblog.gg;

import org.junit.Test;

import org.junit.runner.RunWith;

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

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.annotation.Resource;

import static org.junit.Assert.*;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(classes = VedioPlayerConfig.class)

public class Mp3PlayerTest {

    @Autowired

    private  VedioPlayer player;

    @Resource(name="mp3")

    private  VedioPlayer player2;

    @Test

    public void playNotNull()

    {

        assertNotNull(player);

        assertNotNull(player2);

        assertTrue (player==player2);

    }

}