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 {@AutowiredUserMapper userMapper;@Overridepublic 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 configurationPUBLIC "-//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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsdhttp://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 {@Testpublic void testInsert(){ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");UserService userService = applicationContext.getBean("userService", UserService.class);userService.insert(new User(1,"abc"));}
}