V2AS问路
Spring5：事务管理【整合Mybatis】
阅读原文时间：2023年07月09日阅读：6

1：导入依赖

    <dependencies>
        <!--测试依赖-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

        <!--Spring面向切面依赖-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>

        <!--Spring依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

        <!--mysql驱动依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <!--mybaits依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>

        <!--spring 数据操作依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

        <!--mybatis和spring整合依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.3</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.10</version>
        </dependency>
    </dependencies>

    <!--maven 静态资源管理，主要是为了导出mapper-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

数据库语句：

CREATE TABLE `my_user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `last_name` varchar(255) DEFAULT NULL,
  `gender` char(1) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;

INSERT INTO `my_user` VALUES ('1', 'tom', '0', 'tom@163.com');
INSERT INTO `my_user` VALUES ('2', 'king2', '1', 'king2@163.com');
INSERT INTO `my_user` VALUES ('6', 'menglingfeng', '1', 'ff@163.com');
INSERT INTO `my_user` VALUES ('7', 'tom2', '1', 'tom2@163.com');

2：构建mybatis程序

①创建UserVo对象

com\applesnt\vo\UserVo.java

package com.applesnt.vo;
import lombok.Data;

@Data
public class UserVo {

    private String lastName;
    private String gender;
    private String email;
}

②创建mapper接口

com\applesnt\mapper\UserMapper.java

package com.applesnt.mapper;

import com.applesnt.vo.UserVo;
import java.util.List;

public interface UserMapper {
    public List<UserVo> getAllUser();
}

③创建mapper接口对应的xml

com\applesnt\mapper\UserMapper.xml

<?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接口的全路径-->
<mapper namespace="com.applesnt.mapper.UserMapper">

    <select id="getAllUser" resultType="com.applesnt.vo.UserVo" databaseId="mysql">
        select u.id,u.last_name,u.gender,u.email from my_user u
    </select>

</mapper>

④-1:创建数据库连接文件

resources\jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://ip:3306/my_test?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

④-2:创建mybatis主配置文件

resources\mybatis-config.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>

    <!--
    properties:引入数据源properties文件
    -->
    <properties resource="jdbc.properties"></properties>

    <settings>
        <!--打印sql语句-->
        <setting name="logImpl" value="STDOUT_LOGGING" />
        <!-- 全局性设置懒加载 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <!-- 每个属性都按需加载 -->
        <setting name="aggressiveLazyLoading" value="false"/>
        <!-- 开启驼峰命名 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>

    <!-- 别名 -->
    <typeAliases>
        <package name="com.applesnt.vo.UserVo"/>
    </typeAliases>

    <!--environments:环境配置 -->
    <!--默认执行的配置 -->
    <environments default="dev_mysql">
        <!--mysql环境配置 -->
        <environment id="dev_mysql">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <!--读取properties属性 -->
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>

    <!-- databaseIdProvider 支持多数据库厂商
           DB_VENDOR:得到数据库厂商的标识 MySQL,Oracle,SQL Server
    -->
    <databaseIdProvider type="DB_VENDOR">
        <!-- 为不同的数据库厂商起别名 -->
        <property name="MySQL" value="mysql"/>
    </databaseIdProvider>

    <!-- mappers 将sql映射注入到全局配置中 -->
    <mappers>

        <mapper resource="com/applesnt/mapper/UserMapper.xml"></mapper>

    </mappers>

</configuration>

⑤测试

@Test
public void test01() throws IOException {

    String resource = "mybatis-config.xml";

    InputStream inputStream = Resources.getResourceAsStream(resource);

    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    SqlSession sqlSession = sqlSessionFactory.openSession(true);

    UserMapper userMapper = sqlSession.getMapper(UserMapper.class);

    List<UserVo> userList = userMapper.getAllUser();
    for (UserVo userVo : userList) {
        System.out.println(userVo);
    }
}

打印结果：

UserVo(lastName=tom, gender=0, email=tom@163.com)
UserVo(lastName=king2, gender=1, email=king2@163.com)
UserVo(lastName=menglingfeng, gender=1, email=ff@163.com)
UserVo(lastName=tom2, gender=1, email=tom2@163.com)

Spring整合Mybatis（1）

①创建UserVo对象

com\applesnt\vo\UserVo.java

package com.applesnt.vo;
import lombok.Data;

@Data
public class UserVo {

    private String lastName;
    private String gender;
    private String email;
}

②创建mapper接口

com\applesnt\mapper\UserMapper.java

package com.applesnt.mapper;

import com.applesnt.vo.UserVo;
import java.util.List;

public interface UserMapper {
    public List<UserVo> getAllUser();
}

③创建mapper接口的实现类

com\applesnt\mapper\impl\UserMapperImpl.java

package com.applesnt.mapper.impl;

import com.applesnt.mapper.UserMapper;
import com.applesnt.vo.UserVo;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;

public class UserMapperImpl implements UserMapper {

    /*定义spring-mybatis操作对象*/
    private SqlSessionTemplate sqlSession;

    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List<UserVo> getAllUser() {
        UserMapper umapper = sqlSession.getMapper(UserMapper.class);
        return umapper.getAllUser();
    }
}

④创建mapper接口对应的xml

com\applesnt\mapper\UserMapper.xml

<?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接口的全路径-->
<mapper namespace="com.applesnt.mapper.UserMapper">

    <select id="getAllUser" resultType="com.applesnt.vo.UserVo">
        select u.id,u.last_name,u.gender,u.email from my_user u
    </select>

</mapper>

⑤:创建数据库连接文件

resources\jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://ip:3306/my_test?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

⑥:创建mybatis主配置文件

resources\mybatis-config.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>

    <settings>
        <!--打印sql语句-->
        <setting name="logImpl" value="STDOUT_LOGGING" />
        <!-- 全局性设置懒加载 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <!-- 每个属性都按需加载 -->
        <setting name="aggressiveLazyLoading" value="false"/>
        <!-- 开启驼峰命名 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>

    <typeAliases>
        <package name="com.applesnt.vo.UserVo"/>
    </typeAliases>

</configuration>

⑦:创建spring主配置文件

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--加载jdbc配置文件-->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
            </list>
        </property>
    </bean>

    <!--数据源配置 数据源提供者包括：spring、c3p0、dbcp、druid-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

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

    <!--配置得到SqlSession-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <!--没有set方法 只能通过构造器注入-->
        <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
    </bean>

    <!--实例化业务类-->
    <bean id="userMapper" class="com.applesnt.mapper.impl.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"></property>
    </bean>

</beans>

⑧测试

@Test
public void test02() throws IOException {

    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

    UserMapper userMapper = context.getBean("userMapper", UserMapper.class);

    List<UserVo> userList = userMapper.getAllUser();
    for (UserVo userVo : userList) {
        System.out.println(userVo);
    }
}

打印结果：

UserVo(lastName=tom, gender=0, email=tom@163.com)
UserVo(lastName=king2, gender=1, email=king2@163.com)
UserVo(lastName=menglingfeng, gender=1, email=ff@163.com)
UserVo(lastName=tom2, gender=1, email=tom2@163.com)

Spring整合Mybatis（2）

基于Spring整合Mybatis（1）

①创建mapper接口的实现类

com\applesnt\mapper\impl\UserMapperImpl2.java

package com.applesnt.mapper.impl;

import com.applesnt.mapper.UserMapper;
import com.applesnt.vo.UserVo;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import java.util.List;

public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {
    /*
    * 继承SqlSessionDaoSupport会通过getSqlSession()自动获取SqlSession
    * */
    @Override
    public List<UserVo> getAllUser() {
        return getSqlSession().getMapper(UserMapper.class).getAllUser();
    }
}

②在spring配置文件中实例化UserMapperImpl2

<!--继承了SqlSessionDaoSupport 直接注入sqlSessionFactory-->
 <bean id="userMapper2" class="com.applesnt.mapper.impl.UserMapperImpl2">
     <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
 </bean>

③测试

@Test
public void test02() throws IOException {

    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

    UserMapper userMapper = context.getBean("userMapper2", UserMapper.class);

    List<UserVo> userList = userMapper.getAllUser();
    for (UserVo userVo : userList) {
        System.out.println(userVo);
    }
}

打印结果：

UserVo(lastName=tom, gender=0, email=tom@163.com)
UserVo(lastName=king2, gender=1, email=king2@163.com)
UserVo(lastName=menglingfeng, gender=1, email=ff@163.com)
UserVo(lastName=tom2, gender=1, email=tom2@163.com)

①创建UserVo对象

com\applesnt\vo\UserVo.java

package com.applesnt.vo;

import lombok.Data;

@Data
public class UserVo {

    private Integer id;
    private String lastName;
    private String gender;
    private String email;

    public UserVo() {
    }

    public UserVo(String lastName, String gender, String email) {
        this.lastName = lastName;
        this.gender = gender;
        this.email = email;
    }
}

②创建mapper接口

com\applesnt\mapper\UserMapper.java

package com.applesnt.mapper;

import com.applesnt.vo.UserVo;
import java.util.List;

public interface UserMapper {
    /*查询用户*/
    public List<UserVo> getAllUser();
    /*添加用户*/
    public void addUser(UserVo userVo);
    /*删除用户*/
    public void deleteUser(String name);
}

③创建mapper接口的实现类

com\applesnt\mapper\impl\UserMapperImpl.java

package com.applesnt.mapper.impl;

import com.applesnt.mapper.UserMapper;
import com.applesnt.vo.UserVo;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import java.util.List;

/*
 * 继承SqlSessionDaoSupport会通过getSqlSession()自动获取SqlSession
 * */
public class UserMapperImpl extends SqlSessionDaoSupport implements UserMapper {

    /*模拟事务提交*/
    @Override
    public List<UserVo> getAllUser() {
        UserMapper mapper = getSqlSession().getMapper(UserMapper.class);

        UserVo userVo = new UserVo("xlz","1","xlz@qq.com");
        //添加操作
        mapper.addUser(userVo);
        //删除操作
        mapper.deleteUser("xlz");
        return mapper.getAllUser();
    }

    @Override
    public void addUser(UserVo userVo) {

    }

    @Override
    public void deleteUser(String name) {

    }
}

④创建mapper接口对应的xml

com\applesnt\mapper\UserMapper.xml

<?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.applesnt.mapper.UserMapper">

    <select id="getAllUser" resultType="com.applesnt.vo.UserVo">
        select u.id,u.last_name,u.gender,u.email from my_user u
    </select>

    <!--添加用户-->
    <insert id="addUser"  useGeneratedKeys="true" keyProperty="id">
        insert into my_user(last_name,gender,email)
        values(#{lastName},#{gender},#{email})
    </insert>

    <!--删除用户（模拟出差 deletes ）-->
    <delete id="deleteUser">
        deletes from my_user where last_name = #{name}
    </delete>

</mapper>

⑤:创建数据库连接文件

resources\jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://ip:3306/my_test?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

⑥:创建mybatis主配置文件

resources\mybatis-config.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>

    <settings>
        <!--打印sql语句-->
        <setting name="logImpl" value="STDOUT_LOGGING" />
        <!-- 全局性设置懒加载 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <!-- 每个属性都按需加载 -->
        <setting name="aggressiveLazyLoading" value="false"/>
        <!-- 开启驼峰命名 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>

    <typeAliases>
        <package name="com.applesnt.vo.UserVo"/>
    </typeAliases>

</configuration>

⑦:创建spring主配置文件

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--加载jdbc配置文件-->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
            </list>
        </property>
    </bean>

    <!--数据源配置 数据源提供者包括：spring、c3p、dbcp、druid-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

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

    <!--配置得到SqlSession-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <!--没有set方法 只能通过构造器注入-->
        <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
    </bean>

    <!--实例化业务类-->
    <bean id="userMapper" class="com.applesnt.mapper.impl.UserMapperImpl">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean>

</beans>

⑧测试

 @Test
 public void test02() throws IOException {

     ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

     UserMapper userMapper = context.getBean("userMapper", UserMapper.class);

     userMapper.getAllUser();
 }

结果：

添加成功数据提交到数据库 但删除是失败的，并没有事务管理

⑨配置事务

早spring配置文件中增加事务的配置：

<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>

<!--配置事务通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <!--给哪些方法配置事务-->
    <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="txpoint" expression="execution(* com.applesnt.mapper.*.*(..))"></aop:pointcut>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="txpoint"></aop:advisor>
</aop:config>

进行测试会发现添加操作数据并没有提交到数据库！！！

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