Spring与MyBatis集成,使用的数据源是c3p0,为什么需要引入spring-jdbc这个jar包?（如下面的代码）

Question

下面的错误应该是与数据源的注入相关吧!!!但是为什么引入spring-jdbc这个jar包就能解决呢? 如果不引入spring-jdbc这个jar包:将报如下的错(关键信息): 警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in file [C:\Users\123\IdeaProjects\SpringDemo\target\seckill\WEB-INF\classes\spring\spring-dao.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are: PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'dataSource' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/jdbc/datasource/TransactionAwareDataSourceProxy 下面再附上spring-dao.xml中有关数据源的配置: <!--2.数据库连接池--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!--配置连接池属性--> <property name="driverClass" value="${driver}" /> <!-- 基本属性 url、user、password --> <property name="jdbcUrl" value="${url}" /> <property name="user" value="${jdbc.username}" /> <property name="password" value="${password}" /> <!--c3p0私有属性--> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!--关闭连接后不自动commit--> <property name="autoCommitOnClose" value="false"/> <!--获取连接超时时间--> <property name="checkoutTimeout" value="1000"/> <!--当获取连接失败重试次数--> <property name="acquireRetryAttempts" value="2"/> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!--扫描sql配置文件:mapper需要的xml文件--> <property name="mapperLocations" value="classpath:com/imooc/mappers/*.xml"/> </bean>