一直提示这个bean没有被定义 我明明定义了的哪里出错了

package com.autowiring;

public class AutoService {
    private AutoDao aotudao1;

	public AutoService(AutoDao aotudao1){
		System.out.println("AutoService构造方法");
		this.aotudao1 = aotudao1;
	}
	
	public void setAotudao1(AutoDao aotudao1) {
		System.out.println("AutoService set方法");
		this.aotudao1 = aotudao1;
	}
	public void say(String word) {
	     this.aotudao1.say(word);
		
	}
}

package com.autowiring;

import org.junit.Test;

import com.imooc.test.base.UnitTestBase;

public class AutoTest extends UnitTestBase{
        public AutoTest(){
        	super("classpath*:spring.autowiring.xml");
        }
         @Test
        public void testbyname(){
        	AutoService Service=super.getBean("auto");
        	Service.say("hello");
        }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd"
      default-autowire="byName">
        
	<bean id="aotudao1" class="com.autowiring.AutoDao"  ></bean>
	<bean id="auto" class="com.autowiring.AutoService">
	</bean>
 </beans>

package com.autowiring;

public class AutoDao {
     public void say(String word){
    	 System.out.println("这是Dao层:"+word);
     }
}

错误信息：No bean named 'auto' is defined

我的配置文件哪里错了