spring中配置事务管理器

<?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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
          http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">

    <context:property-placeholder location="jdbc.properties"></context:property-placeholder>

    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <bean class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <context:component-scan base-package="com.hh.spring"></context:component-scan>

    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--开启事务的注解驱动-->
    <tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

package com.hh.spring.service.impl;

import com.hh.spring.dao.BookDao;
import com.hh.spring.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author hh
 * @version 1.0
 * @DATE 2023-09-14 14:42:10
 */
@Service
public class BookServiceImpl implements BookService {

    @Autowired
    private BookDao bookDao;
    @Override
    @Transactional
    public void buyBook(Integer userId, Integer bookId) {
        //查询图书的价格
        Integer price = bookDao.getPriceByBookId(bookId);
        //更新图书的库存
        bookDao.updateStore(bookId);
        //更新用户的余额
        bookDao.updateBalance(userId,price);
    }
}