[SSM]：求解，整合SSM框架时，运行test测试，出现bean嵌套、解析异常

Question

（查询7天了，没有找到解决方案，代码也排查好久，找不出来）
异常：
11月 02, 2023 5:15:52 下午 org.springframework.context.support.AbstractApplicationContext refresh
警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentServiceImpl' defined in class path resource [spring-service.xml]: Cannot resolve reference to bean 'studentMapper' while setting bean property 'studentMapper'
翻译：
11月 02, 2023 5:15:52 下午 org.springframework.context.support.摘要应用程序上下文刷新
警告: 在上下文初始化期间遇到异常-取消刷新尝试：org.spring framework.beans.factory。Be an创建异常:创建名为“ studentServiceImpl ”的 bean 时出错，该 bean 在类路径资源【spring-service.xml】中定义：在设置bean属性“studentMapper”时，无法解析对bean“studentMapper”的引用
依赖如下：

<!--依赖问题：Junit、数据库驱动、连接池、servlet、jsp、mybatis-spring-->
    <dependencies>
        <!--Junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.5</version>
        </dependency>
       <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>3.0.2</version>
        </dependency>
        <!--Spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>6.0.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.23</version>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.30</version>
        </dependency>
        <dependency>
            <groupId>jakarta.servlet</groupId>
            <artifactId>jakarta.servlet-api</artifactId>
            <version>6.0.0</version>
        </dependency>
        <dependency>
            <groupId>tomcat</groupId>
            <artifactId>servlet-api</artifactId>
            <version>5.5.23</version>
        </dependency>
    </dependencies>

spring-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <!--扫描service下的bean-->
    <context:component-scan base-package="com.example.service"/>
    <!--将所有业务类注入到spring：配置或注解实现-->
    <bean id="studentServiceImpl" class="com.example.service.studentServiceImpl">
        <property name="studentMapper" ref="studentMapper"/>
    </bean>
    <!--声明式事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--aop事务支持 -->
</beans>

代码结构：

Answer 1

mybatis.config有配置mappers扫描xml文件吗？

    <mappers>
        <package name="com.example.dao" />
    </mappers>

另外看下studentMapper.xml中，命名空间是否能和对应mapper接口对上