需要导入的包

<dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>
        <!--Spring操作数据库的话，还需要Spring-jdbc-->
        <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.3.15</version>
        </dependency>
        <!--Aop织入-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.13</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class user {
    private int id;
    private String name;
    private String pwd;
}

接口

public interface userMapper {
    List<user> selectuser();
}

接口配置文件

<?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.Google.Mapper.userMapper">
    <select id="selectuser" resultType="user">
      select * from mybatis.user
    </select>

</mapper>

配置spring(这里采用最原始的方法)

<?xml version="1.0" encoding="UTF8"?>
<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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--dateSource  使用spring数据源配置代替Mybatis的数据源
    这里使用 Spring中的JDBC包下的DriverManagerDataSource
    -->
    <bean id="dateSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>

    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dateSource"/>
        <!--绑定Mybatis配置文件.这里Spring配置文件和Mybatis配置文件就连起来了-->
        <property name="configLocation" value="classpath:Mybatis.xml"/>
        <!--注册映射器-->
        <property name="mapperLocations" value="classpath:com/Google/Mapper/*.xml"/>
    </bean>
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        &lt;!&ndash;SqlSessionTemplate类中只有有参构造，使用不了set注入&ndash;&gt;
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

编写实现类

public class userMapperimpl implements userMapper{

    private SqlSessionTemplate sqlSession;

    public userMapperimpl(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List<user> selectuser() {
        userMapper mapper = sqlSession.getMapper(userMapper.class);
        return mapper.selectuser();
    }
}

注册bean

    <bean id="userMapper" class="com.Google.Mapper.userMapperimpl">
        <constructor-arg index="0" ref="sqlSession"/>
    </bean>

测试

public class MyTest {
    @Test
    public void test() {
        ApplicationContext context = new ClassPathXmlApplicationContext("spring-Dao.xml");
        userMapper userMappers = context.getBean("userMapper2", userMapper.class);
        List<user> users = userMappers.selectuser();
        for (user user : users) {
            System.out.println(user);
        }
    }
}

结果

user(id=2, name=aaa, pwd=bbb)
user(id=3, name=李四, pwd=1231233)
user(id=4, name=李三, pwd=123123)
user(id=5, name=夏鸥, pwd=23234234)

更精简整合Mybatis

mybatis-Spring提供了一个父类SqlSessionDaoSupport。我们直接继承这个类，再去spring中注入参数sqlSessionFactory。我们再调用方法getSqlSession()就可以得到sqlSession。这里我们可以不在spring中去注册

class="org.mybatis.spring.SqlSessionTemplate">

实现类

public class userMapperimpl2 extends SqlSessionDaoSupport implements userMapper{
    @Override
    public List<user> selectuser() {
        return getSqlSession().getMapper(userMapper.class).selectuser();
    }
}

Spring配置

<?xml version="1.0" encoding="UTF8"?>
<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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--dateSource  使用spring数据源配置代替Mybatis的数据源
    这里使用 Spring中的JDBC包下的DriverManagerDataSource
    -->
    <bean id="dateSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>

    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dateSource"/>
        <!--绑定Mybatis配置文件.这里Spring配置文件和Mybatis配置文件就连起来了-->
        <property name="configLocation" value="classpath:Mybatis.xml"/>
        <!--注册映射器-->
        <property name="mapperLocations" value="classpath:com/Google/Mapper/*.xml"/>
    </bean>
    <bean id="userMapper2" class="com.Google.Mapper.userMapperimpl2">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>
</beans>

实现还是与前一种方式一样