装配Bean:JavaConfig@Component@ComponentScan@Configuration

包扫描+JavaConfig方式加载Beans
@Component
@ComponentScan
@Configuration

接口类

package com.xbz.learn.spring.autowire;public interface MobilePhone {    /**     * 给XXX打电话     * @param phoneNumber     */    public void callPerson(String phoneNumber);}

实现类

package com.xbz.learn.spring.autowire;import org.springframework.stereotype.Component;/** * MobilePhone接口的iphone实现类 * @author xbz * */@Component("iphone")public class Iphone implements MobilePhone{    public void callPerson(String phoneNumber) {        System.out.println("iphone 正在向【"+phoneNumber+"】打电话");    }}

package com.xbz.learn.spring.autowire;import org.springframework.stereotype.Component;@Component("xiaomi")public class XiaoMiPhone implements MobilePhone {    public void callPerson(String phoneNumber) {        System.out.println("小米手机 正在向【"+phoneNumber+"】打电话");    }}

JavaConfig类

package com.xbz.learn.spring.autowire.javaConfig;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import com.xbz.learn.spring.autowire.MobilePhone;@Configuration@ComponentScan(basePackageClasses={MobilePhone.class})public class SpringJavaConfig {}

测试类

package com.xbz.learn.spring.autowire.javaConfig;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 com.xbz.learn.spring.autowire.MobilePhone;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(classes={SpringJavaConfig.class})public class SpringJavaConfigTest {    @Autowired()    private MobilePhone iphone;    @Autowired()    private MobilePhone xiaomi;    @Test    public void testJavaConfig(){        System.out.println("iphone:"+iphone);        System.out.println("xiaomi:"+xiaomi);        iphone.callPerson("iphone");        xiaomi.callPerson("xiaomi");        System.out.println("is same?"+(iphone==xiaomi));    }}

都说@Autowired默认类型匹配，但是我上面IOC容器明明有两个MobilePhone接口的不同实现类，为什么测试正常呢？？？当我将其中一个变量名改为小米2时，就会出现报错。
所以我猜测
1.@Autowired是变量名称优先，没有才会是类型匹配。
2.先按照类型匹配，发现有多个时，就会用变量名称匹配，如果不存在，则报错。（似乎这个比较合理）