Spring Study-lesson14-事务-2023-03-19

遵循ACID原则，这样保证批量事务其中一项报错，整个批量事务都不执行。

案例：在spring-dao.xml中加载 aop 和 tx 注意细节：xmlns: aop(或tx)要有整个名字， 另外注意 > 和 “”的位置和范围

<?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: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-2.5.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd
           http://www.springframework.org/schema/tx
           http://www.springframework.org/schema/tx/spring-tx.xsd">

   <!--DataSource:使用spring的数据源替换Mybatis的配置 c3p0 dbcp druid    -->
   <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
       <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
       <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
       <property name="username" value="root"/>
       <property name="password" value="123456"/>
   </bean>

    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="datasource"/>
        <!--绑定mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath:com/feijian/mapper/*.xml"/>
    </bean>

    <!--sqlSessionTemplate:就是我们之前使用的sqlSessionFactory-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--        只能用构造器注入sqlSessionFactory,因为它没有set方法-->
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

<!--    配置声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <constructor-arg ref="datasource"/>
    </bean>

<!--  结合AOP实现事务的织入  -->
   <tx:advice id="txAdvice" transaction-manager="transactionManager">
       <tx:attributes>
           <tx:method name="add" propagation="REQUIRED"/>
           <tx:method name="delete" propagation="REQUIRED"/>
           <tx:method name="update" propagation="REQUIRED"/>
           <tx:method name="query" read-only="true"/>
           <tx:method name="*" propagation="REQUIRED"/>
       </tx:attributes>
   </tx:advice>

<!-- 配置事务切入   -->
    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* com.feijian.mapper.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
    </aop:config>

</beans>

有多个业务 接口类

package com.feijian.mapper;

import com.feijian.pojo.User;

import java.util.List;

public interface UserMapper {
    public List<User> selectUser();

    //添加一个用户
    public int addUser(User user);

    //删除一个用户
    public int deleteUser(int id);
}

接口实现配置文件 UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.feijian.mapper.UserMapper">

    <select id="selectUser" resultType="user">
        select * from mybatis.user;
    </select>

    <insert id="addUser" parameterType="user">
        insert into mybatis.user (id,name,pwd) values(#{id},#{name},#{pwd})
    </insert>

    <delete id="deleteUser" parameterType="int">
        delete from mybatis.user where id=#{id}
    </delete>
</mapper>