AOP声明式事务

1.spring-dao.xml修改

参考上面工程配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
       http://www.springframework.org/schema/mvc
       https://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context-4.2.xsd
       http://www.springframework.org/schema/aop
       https://www.springframework.org/schema/aop/spring-aop-4.2.xsd
       http://www.springframework.org/schema/tx
       https://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--spring整合mybatis-->
    <!--DataSounrce: 使用spring的数据源替换Mybatis的位置-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/>
        <property name="username" value="root"/>
        <property name="password" value="333"/>
    </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/shao/mapper/*.xml"/>
    </bean>
    <!--SqlSessionTemplate就是我们使用sqlsession-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <!--只能使用构造器注入，因为没有set方法-->
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

    <!--<bean id="userMapper" class="com.shao.mapper.UserMapperImpl">-->
    <!--    <property name="sqlSession" ref="sqlSession"/>-->
    <!--</bean>-->
    <!--&lt;!&ndash;这里面就没有sqlsession了，因为直接用了，此时把工厂注入就可以了&ndash;&gt;-->
    <!--<bean id="userMapper2" class="com.shao.mapper.UserMapperImpl2">-->
    <!--    <property name="sqlSessionFactory" ref="sqlSessionFactory"/>-->
    <!--</bean>-->
    <!--配置声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <constructor-arg ref="dataSource"/>
    </bean>
    <!--利用AOP实现事务的织入-->
    <!--配置事务的类-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--给哪些方法配置事务-->
        <!--配置事务的传播特性-->
        <tx:attributes>
            <tx:method name="add" propagation="REQUIRED"/>
            <tx:method name="update" propagation="REQUIRED"/>
            <tx:method name="delete" propagation="REQUIRED"/>
            <tx:method name="query" read-only="true"/>
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
    <!--配置事务切入-->
    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* com.shao.mapper.*.*(..))"/>
        <!--这样上述的所有方法都会变成事务-->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
    </aop:config>
</beans>

2.增加两个数据库操作方法

package com.shao.mapper;

import com.shao.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import java.util.List;

public class UserMapperImpl extends SqlSessionDaoSupport implements UserMapper {

    @Override
    public List<User> selectUser() {
        User user = new User(11, "xiaowang", "12345");
        UserMapper mapper = getSqlSession().getMapper(UserMapper.class);
        mapper.addUser(user);
        mapper.deleteUser(11);
		//如果不开启事务，当delete方法写错的时候，还可以插入用户。
        return mapper.selectUser();
    }

    @Override
    public int addUser(User user) {
        return getSqlSession().getMapper(UserMapper.class).addUser(user);
    }

    @Override
    public int deleteUser(int id) {
        return getSqlSession().getMapper(UserMapper.class).deleteUser(id);
    }
}

3.将delete方法写错

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--namespace绑定一个dao/mapper接口 -->
<mapper namespace="com.shao.mapper.UserMapper">
    <select id="selectUser" resultType="User">
        select * from user
    </select>
    <insert id="addUser" parameterType="User">
        insert into user(id, name, password) VALUES (#{id}, #{name}, #{password})
    </insert>
    <delete id="deleteUser" parameterType="int">
        deletes from user where id = #{id}
    </delete>
</mapper>

4.测试

package com.shao.mapper;

import com.shao.pojo.User;
import junit.framework.TestCase;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

public class UserMapperTest  {
    @Test
    public void testSelectUser() {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMapper userMapper = (UserMapper) context.getBean("userMapper");
        List<User> userList = userMapper.selectUser();
        for (User user : userList) {
            System.out.println(user);
        }
    }
}