依据前一篇《Spring + Hibernate整合》：https://blog.csdn.net/wenwenliuyunabcd/article/details/100703434，进行修改

spring容器配置beans.xml：

此处同时做了下事务的注解驱动

<?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:aop="http://www.springframework.org/schema/aop"
    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/tx http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">


    <context:property-placeholder location="classpath:db.properties" />
    <!-- 扫描service,respositroy组件 -->
    <context:component-scan base-package="com.liuyun"></context:component-scan>
    <!-- 数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!-- sessionFactory (Spring接管) -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 配置Hibernate相关属性 -->
        <property name="hibernateProperties">
            <props>
                <!-- 配置方言,打印语句,格式化sql,自动建表 -->
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">false</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
        <!-- 指定映射文件 -->
<!--         <property name="mappingResources">
            <list>
                <value>/com/liuyun/domain/User.hbm.xml</value>
            </list>
        </property> -->
        <!-- 指定扫描的包：扫描还有注解配置映射关系的实体 -->
        <property name="packagesToScan">
            <list>
                <value>com.liuyun.domain</value>
            </list>
        </property>
    </bean>

    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

    <!--a. 事务管理类 -->
    <bean id="trans" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <!-- 开启注解事务，在业务代码中加入注解进行事务控制 -->
    <tx:annotation-driven transaction-manager="trans" />
</beans>

事务的注解驱动修改业务类UserServiceImpl ：

package com.liuyun.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.liuyun.dao.IUserDao;
import com.liuyun.domain.User;
import com.liuyun.service.IUserService;

@Service("userService")
@Transactional(propagation = Propagation.REQUIRED, readOnly = false)
public class UserServiceImpl implements IUserService {

    @Autowired
    IUserDao userDao;

    @Override
    public int save(User user) {
        return userDao.save(user);
    }

    @Override
    public void update(Long id, User user) {
        user.setId(id);
        userDao.update(user);
    }

    @Override
    public void deleteById(Long id) {
        userDao.deleteById(id);
    }

    @Override
    @Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
    public List<User> findAll() {
        return userDao.findAll();
    }

    @Override
    @Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
    public User findById(Long id) {
        return userDao.findById(id);
    }

    @Override
    @Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
    public User findByName(String name) {
        return userDao.findByName(name);
    }

}