步骤：
1.导入相关依赖包
2.配置数据源（连接数据库相关操作）
3.创建sqlSessionFactory
4.创建sqlSessionTemplate
5.将自己写的类注入到Spring中
6.测试
导包
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.3.19</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.26</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.3.18</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.6</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency> </dependencies>
创建spring-mybatis.xml文件（固定文件，只需要修改 数据库配置、mybatis配置文件路径、mapper.xml路径）
<?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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--数据源配置--> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306?mybatis&serverTimezone=UTC&characterEncoding=utf8&useUnicode=true"/> <property name="username" value="root"/> <property name="password" value="1234"/> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!--绑定mybatis配置文件“注意”--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <!--绑定xml文件“注意”--> <property name="mapperLocations" value="classpath:com/peng/mapper/*.xml"/> </bean> <!--SqlSessionTemplate就是sqlSession--> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <!--只能通过构造器注入sqlSessionFactory因为他没有set方法--> <constructor-arg index="0" ref="sqlSessionFactory"/> </bean> </beans>
mybatis-config.xml文件只写别名与设置
<?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> <typeAliases> <package name="com.peng.pojo"/> </typeAliases> <!--别名设置留下--> </configuration>
创建一个spring注入文件applicationContext.xml只负责注入
<?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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--导入spring配置文件--> <import resource="spring-mybatis.xml"/> <bean id="userMapper" class="com.peng.mapper.UserMapperImpl"> <property name="sqlSession" ref="sqlSession"/> </bean> </beans>
创建实现类（spring的代理模式必须有实现类，注入还要有set方法）
xxx*mapper.xml与mybatis一样实现相应的sql语句
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.peng.mapper.UserMapper"> <select id="selectUser" resultType="User" > select * from mybatis.user </select> </mapper>
测试类
import com.peng.mapper.UserMapper; import com.peng.pojo.User; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class MyTest { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); UserMapper userMapper = context.getBean("userMapper", UserMapper.class); for (User user : userMapper.selectUser()) { System.out.println(user); } } }
