1、引入依赖

<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>6.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.11</version>
        </dependency>
        <dependency>
        <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.30</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.13</version>
        </dependency>
        
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>

2、编写mapper接口

3、编写mapper配置文件

⼀定要注意，按照下图提示创建这个⽬录。注意是斜杠不是点⼉。在resources⽬录下新建。并且要和 Mapper接⼝包对应上

结构如下 

 

如果接⼝叫做UserMapper，配置⽂件必须是UserMapper.xml 

4、编写service接⼝和service接⼝实现类

注意编写的service实现类纳⼊IoC容器管理：

public interface UserService {
    int insert(User user);
}


@Service
public class UserServiceImpl implements UserService {
    @Autowired
    UserMapper userMapper;

    @Override
    public int insert(User user) {
        return userMapper.insert(user);
    }
}

5、编写jdbc.properties配置⽂件

放在类的根路径下

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring6
jdbc.username=root
jdbc.password=root

6、编写mybatis-config.xml配置⽂件

放在类的根路径下，只开启⽇志，其他配置到spring.xml中。

<?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>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
</configuration>

7、编写spring.xml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: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
       https://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!--组件扫描-->
    <context:component-scan base-package="com.springcode"/>

    <!--外部属性配置⽂件-->
    <context:property-placeholder location="jdbc.properties"/>

    <!--数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!--SqlSessionFactoryBean-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--mybatis核⼼配置⽂件路径-->
        <property name="configLocation" value="mybatis-config.xml"/>
        <!--注⼊数据源-->
        <property name="dataSource" ref="dataSource"/>
        <!--起别名-->
        <property name="typeAliasesPackage" value="com.springcode.example.entity.User"/>
    </bean>

    <!--Mapper扫描器-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.springcode.example.mapper"/>
    </bean>

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

 

8、测试

public class SpringTest {
    @Test
    public void testInsert(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
        UserService userService = applicationContext.getBean("userService", UserService.class);
        userService.insert(new User(1,"abc"));
    }
}