Spring Mybatis结合

相关jar包

junit
mybatis
mysql数据库
spring相关包
aop
mybatis-spring

开始整合

将mybatis的配置文件的一些信息整合到spring里面
数据源绑定
sqlSession交给一个工厂类处理生成

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd">
    <!--使用Spring替换mybatis的数据源
    这里使用Spring的jdbc-->
    <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?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=GMT%2B8"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
    </bean>

    <!--SqlsessionFactory-->

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!--绑定mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--绑定后可以在这设置mybatis 下面配置mapper-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>
    <!--SqlSessionTemplate就是我们用的sqlSession-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

    <bean id="UserMapper" class="mapper.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>
</beans>

mybatis的配置文件被简化成如下:(别名配置信息仍然写在mybatis里面)

<?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">
<!--核心配置文件-->
<configuration>
    
    <typeAliases>
        <package name="pojo"/>
    </typeAliases>

</configuration>

在写了接口和mapper配置文件后 现在需要多一步写实体类(符合Spring的思想 交给Spring管理)

package mapper;

import org.mybatis.spring.SqlSessionTemplate;
import pojo.User;

import java.util.List;

public class UserMapperImpl implements UserMapper {
    private SqlSessionTemplate sqlSession;
    //现在我们的所有操作都由SqlSessionTemplate操作

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

    public List<User> selectUser() {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }
}

主程序:

import mapper.UserMapper;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import pojo.User;
import utiles.MybatisUtiles;

import java.util.List;

public class Mytest {
    @Test
    public void test1(){
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
        UserMapper userMapper = context.getBean("UserMapper", UserMapper.class);
        List<User> list = userMapper.selectUser();
        for (User user : list) {
            System.out.println(user);
        }
    }
}