springMVC项目，遇到@Autowired注入为null，空指针错误

Question

看网上视频跟着学的SpringMVC，不知道是哪里出错了？

applicationContext.xml文件扫描：

<context:component-scan base-package="com.atguigu">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

Mapper测试类，两个注入都是null：

@ExtendWith(SpringExtension.class)//spring junit5
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class MapperTest {

    @Autowired
    DepartmentMapper departmentMapper;

    @Autowired
    EmployeeMapper employeeMapper;

文件结构：

DepartmentMapper和EmployeeMapper接口上添加注解或者不添加注解都一样的结果，请问是哪里出错了？

错误信息：

null

java.lang.NullPointerException: Cannot invoke "com.atguigu.crud.dao.EmployeeMapper.insertSelective(com.atguigu.crud.bean.Employee)" because "this.employeeMapper" is null

    at com.atguigu.crud.test.MapperTest.testCRUD(MapperTest.java:45)

Answer 1

原因找到了，spring-test包和junit包的版本没有对应造成的