spring整合mybatis，用自动注入接口，报错空指针

第一次spring整合mybatis，用自动注入接口，报错空指针，不知到错哪里啦
项目结构是这样子的

mybatis-spring的整合代码是这样

```java

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

    <context:property-placeholder location="classpath:jdbc.properties">context:property-placeholder>
    <bean id="datasouce" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}">property>
        <property name="url" value="${jdbc.url}">property>
        <property name="username" value="${jdbc.username}">property>
        <property name="password" value="${jdbc.password}">property>
    bean>
    <bean id="sqlssionfactiry" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="datasouce">property>

    bean>
   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
       <property name="basePackage" value="mapper">property>
   bean>
beans>

然后很简单的就是随便写了一个接口，并在mapper.xml里面写了查询代码

```java
package mapper;

public interface shixian {
    public String select();
}

mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="mapper.shixian">
<select id="select">
    select 'main' from t_lable where id=1
select>

mapper>

然后再测试是这样的

package test;

import mapper.shixian;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

@Controller
public class tttt {
    @Autowired
    private shixian a;
    @Test
    public void ttttt(){
Object name=a.select();
System.out.println("name");
    }
}

报错是这样的

你这单元测试类上 要开启 spring的测试框架，才能注入这个接口类

依赖导入了没