1.事务介绍

1.1 事务添加到javaEE的service

1.2 声明式事务和编程试

1.3 声明式

　　xml 事务开发

　　注解方式

1.4 在Spring中进行事务开发底层用的aop原理

1.5 Spring事务管理Api

2. 步骤

2.1 开启事务管理器

2.2 开始事务注解

2.3 在service层中加入，可以加载类上面，也可以加在方法上面

<?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:component-scan base-package="com.demo">

    </context:component-scan>

<!--    引入外部属性文件-->
    <context:property-placeholder location="classpath*:jdbc.properties"/>

    <!--    数据库连接池-->
    <bean id="druid" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${prop.driverClassName}"></property>
        <property name="url" value="${prop.url}"/>
        <property name="username" value="${prop.username}"/>
        <property name="password" value="${prop.password}"/>
    </bean>

    <!--    jdbc模板对象-->

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

    <!--    开启事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="druid"></property>
    </bean>
    <!--    开启注解-->
    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>

</beans>

package com.demo.service;

import com.demo.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
@Transactional
public class UserService {
    @Autowired
    private UserDao userDao;
    public void account(){
        userDao.addMoney();
        int a = 10/0;
        userDao.reduceMoney();
    }
}