MyBatis搭配spring和事务配置

我这里做的例子是mybatis。

一：需要的jar

        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.39</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.3.0</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.4.1</version>        </dependency>

二:配置

• applicationContext.xml

    <?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:dubbo="http://code.alibabatech.com/schema/dubbo"    xmlns:aop="http://www.springframework.org/schema/aop" 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/tx     http://www.springframework.org/schema/tx/spring-tx.xsd         http://www.springframework.org/schema/context     http://www.springframework.org/schema/context/spring-context.xsd     http://www.springframework.org/schema/aop    http://www.springframework.org/schema/aop/spring-aop.xsd    http://code.alibabatech.com/schema/dubbo            http://code.alibabatech.com/schema/dubbo/dubbo.xsd">    <!-- xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" http://code.alibabatech.com/schema/dubbo         http://code.alibabatech.com/schema/dubbo/dubbo.xsd" -->    <!-- 引入配置文件 -->    <import resource="classpath:dubbo.xml" />    <!-- 加入注解支持 -->    <context:component-scan base-package="com.we" />    <!--引入jdbc的xml文件 -->    <import resource="classpath:jdbc.xml" />    <!-- 事务管理,加入对事务的支持 -->    <tx:annotation-driven transaction-manager="transactionManager"        proxy-target-class="true"></tx:annotation-driven>    <!-- 把datasource委托给DataSourceTransactionManager-->    <bean id="transactionManager"        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource" />    </bean>    <!-- 配置Mybatis的 SqlSessionFactoryBean-->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource" />        <property name="configLocation" value="classpath:mybatis.xml"></property>    </bean>    <!-- 配置Myabtis对dao的扫描 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="com.we.dao" />        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />    </bean></beans>

• jdbc.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:task="http://www.springframework.org/schema/task" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans-3.1.xsd     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd    http://www.springframework.org/schema/tx     http://www.springframework.org/schema/tx/spring-tx-3.1.xsd     http://www.springframework.org/schema/task       http://www.springframework.org/schema/task/spring-task-3.1.xsd       http://www.springframework.org/schema/aop    http://www.springframework.org/schema/aop/spring-aop.xsd">    <context:property-placeholder location="classpath:jdbc.properties"        ignore-unresolvable="true" />    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"        init-method="init" destroy-method="close">        <!-- 基本属性 url、user、password -->        <property name="url" value="${jdbc.url}" />        <property name="username" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />        <!-- 配置初始化大小、最小、最大 -->        <property name="initialSize" value="1" />        <property name="minIdle" value="1" />        <property name="maxActive" value="20" />        <!-- 配置获取连接等待超时的时间 -->        <property name="maxWait" value="60000" />        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->        <property name="timeBetweenEvictionRunsMillis" value="60000" />        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->        <property name="minEvictableIdleTimeMillis" value="300000" />        <property name="validationQuery" value="SELECT 'x'" />        <property name="testWhileIdle" value="true" />        <property name="testOnBorrow" value="false" />        <property name="testOnReturn" value="false" />        <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->        <property name="poolPreparedStatements" value="true" />        <property name="maxPoolPreparedStatementPerConnectionSize"            value="20" />        <!-- 配置监控统计拦截的filters，去掉后监控界面sql无法统计 -->        <property name="filters" value="stat" />    </bean></beans>

• mybatis.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE configuration PUBLIC      "-//mybatis.org//DTD Config 3.0//EN"      "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration>    <mappers>        <mapper resource="com/we/dao/PersonDao.xml" />    </mappers></configuration>

3代码

package com.we.dao;import com.we.entry.Person;public interface PersonDao {    public Person get(int id);    // public List<Person> getAll();    //    // public int insert(Person person);    //    public int updateById(Person user);    //    // public int delete(int id);}<?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"><mapper namespace="com.we.dao.PersonDao">    <select id="get" parameterType="com.we.entry.Person" resultMap="result">        select * from person WHERE id=#{id}    </select>    <resultMap type="com.we.entry.Person" id="result">        <id column="id" property="id" />        <result column="name" property="name" />    </resultMap>    <update id="updateById" parameterType="com.we.entry.Person">        update person set        name=#{name}  where id=#{id}    </update></mapper>

4测试

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = "classpath:applicationContext.xml")public class MyTest {    @Resource    private PersonDao userDao;    @Test    public void testAddition() {        assertEquals(userDao.get(1) != null, true);    }    public static void main(String[] args) {        ApplicationContext ctx = new ClassPathXmlApplicationContext(                "applicationContext.xml");        PersonService o = (PersonService) ctx.getBean("ps");        o.testTx();    }}

下面是事务相关的代码

@org.springframework.stereotype.Service("ps")public class PersonServiceImpl implements PersonService {    @Autowired    private PersonDao personDao;    // 可以通过加上该注解，和去掉对比测试。    @Transactional    public void testTx() {        Person p = new Person();        p.setId(1);        p.setName("3333");        personDao.updateById(p);        int i = 1 / 0;// 使代码抛出异常        p.setId(2);        personDao.updateById(p);    }}