在使用mybatis和spring整合mapper接口开发，实现添加用户时报错（Dao方式可以运行）

报错信息：

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.ssm.mapper.UserMapper.insertUser

以下是我mapper接口方式开发实现添加用户代码

整个项目结构

接口及UserMapper.xml文件

public interface UserMapper {
    public int insertUser(User user);
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.ssm.mapper.UserMapper">
    <!-- 添加用户信息 -->
    <insert id="inertUser" parameterType="com.ssm.po.User" >
    insert into t_user(username,jobs,phone) values(#{username},#{jobs},#{phone})
    </insert>
    </mapper>

application.xml

 <!-- mapper代理开发（基于MapperFactoryBean） -->
        <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
            <property name="mapperInterface" value="com.ssm.mapper.UserMapper" />
            <property name="sqlSessionFactory" ref="sqlSessionFactory" />
        </bean>

mybatis-config.xml

<configuration>
    <!-- 配置别名 -->
    <typeAliases>
    <package name="com.ssm.po" />
    </typeAliases>
    <!-- 配置mapper的位置 -->
    <mappers>
        <mapper resource="com/ssm/mapper/UserMapper.xml" />
    </mappers>
</configuration> 

测试类

@Test
    public void insertUserTest(){
        ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMapper userMapper=(UserMapper) applicationContext.getBean("userMapper");
        User user=new User();
        user.setUsername("hqx1");
        user.setJobs("teaccher");
        user.setPhone("123456789");
    userMapper.insertUser(user);
        
    }

报错

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.ssm.mapper.UserMapper.insertUser
    at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:230)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:48)

望帮我看看，谢谢！！

怕写错就复制，这样名字就能统一了

对，复制最好