Spring 整合Mybatis

Spring 整合Mybatis

 所需依赖：

 <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
<!--        spring操作数据库的话，还需要一个spring-jdbc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.3</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.2</version>
        </dependency>
    </dependencies>

第一步：先写一个mybatis程序：

博客：https://www.cnblogs.com/love2000/p/14188244.html

第二步：配置spring配置文件：

 配置数据源：

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

<!-- datasource: 使用Spring的数据源替换Mybatis的配置
     我们这里使用Spring提供的jdbc：springframework.jdbc.datasource
  -->
    <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&amp;useSSL=false&amp;characterEncoding=utf-8&amp;serverTimezone=Asia/Shanghai&amp;autoReconnect=true&amp;failOverReadOnly=false"/>
            <property name="username" value="root"/>
            <property name="password" value="1234"/>
    </bean>


</beans>

spring配置了数据源 就可以把mybatis-config 中的数据源配置删除了。

 

现在mybatis配置文件中只有一个mappers配置了。

配置SqlSessionFactory和sqlSession：

<!--    配置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"/>
    </bean>
<!-- SqlSessionTemplate:就是我们要使用的sqlSession   -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="SqlSessionFactory"/>
    </bean>

beans.xml全部代码：

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

<!-- datasource: 使用Spring的数据源替换Mybatis的配置
     我们这里使用Spring提供的jdbc：springframework.jdbc.datasource
  -->
    <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&amp;useSSL=false&amp;characterEncoding=utf-8&amp;serverTimezone=Asia/Shanghai&amp;autoReconnect=true&amp;failOverReadOnly=false"/>
            <property name="username" value="root"/>
            <property name="password" value="1234"/>
    </bean>

<!--    配置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"/>
    </bean>
<!-- SqlSessionTemplate:就是我们要使用的sqlSession   -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
       
        <constructor-arg index="0" ref="SqlSessionFactory"/>
    </bean>

    <bean id="userMapper" class="com.xiaofu.dao.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>

</beans>

第三步：编写实现类：

 UserMapperImpl：

package com.xiaofu.dao;

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

import java.util.List;

public class UserMapperImpl implements UserMapper{
    private SqlSessionTemplate sqlSession;

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

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

第四步：测试：

@Test
    public void text(){
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
        for (User user : userMapper.getUserList()) {
            System.out.println(user);
        }

    }

运行测试类：

 数据被查了出来