1. Java

MYBATIS-2-整合SPRING5

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0、测试用的SQL

CREATE DATABASE `mybatis` DEFAULT CHARSET utf8; 

USE `mybatis`;

CREATE TABLE `user`(
	`uid` INT(16) NOT NULL PRIMARY KEY AUTO_INCREMENT,
	`uname` VARCHAR(32) NOT NULL,
	`upwd` VARCHAR(32) NOT NULL
)ENGINE=INNODB,DEFAULT CHARSET=utf8;

SHOW TABLES;

INSERT INTO `user` VALUES(1,"BH6AOL","123456"),
(2,"BA1AA","654321"),
(3,"BA1BB","111111");

SELECT * FROM `user`;

1、先看pom依赖

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.0.RELEASE</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.0.RELEASE</version>
        </dependency>


        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
        </dependency>


        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>
</project>

2、编写三个配置文件

applicationContext.xml

<?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
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- 导入spring-dao.xml -->
    <import resource="spring-dao.xml"/>

    <bean id="userMapper" class="top.sencom.mapper.UserMapperImpl">
        <property name="sqlSessionTemplate" ref="sqlSessionTemplate"/>
    </bean>


<!--    第二种方法-->
    <bean id="userMapper2" class="top.sencom.mapper.UserMapperImpl2">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>
</beans>

mybatis-config.xml

<?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>

    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    
</configuration>

spring-dao.xml

<?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
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--    DataSource-->
    <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?characterEncoding=utf8&amp;useSSL=false&amp;serverTimezone=UTC"/>
        <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-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath:top/sencom/mapper/*.xml"/>
    </bean>
    <!--    就是sqlSession-->
    <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
        <!--只能使用构造器注入，没有set方法！！！-->
        <constructor-arg ref="sqlSessionFactory"/>
    </bean>

</beans>

3、编写一个pojo

package top.sencom.pojo;

import lombok.Data;


@Data
public class User {
    private int uid;
    private String uname;
    private String upwd;
}

4、编写UserMapper接口和xml配置

package top.sencom.mapper;

import top.sencom.pojo.User;

import java.util.List;

public interface UserMapper {

    // 获取全部用户
    List<User> getUsers();
}
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">


<mapper namespace="top.sencom.mapper.UserMapper">

    <select id="getUsers" resultType="top.sencom.pojo.User" >
        select * from user
    </select>

</mapper>

5、编写两个实现类分别测试两种方式

package top.sencom.mapper;

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

import java.util.List;

public class UserMapperImpl implements UserMapper{

    // 我的的所有操作都使用sqlSessionTemplate
    private SqlSessionTemplate sqlSessionTemplate;

    public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate){
        this.sqlSessionTemplate = sqlSessionTemplate;
    }

    @Override
    public List<User> getUsers() {
        UserMapper mapper = sqlSessionTemplate.getMapper(UserMapper.class);
        return mapper.getUsers();
    }
}
package top.sencom.mapper;

import org.apache.ibatis.session.SqlSession;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import top.sencom.pojo.User;

import java.util.List;

public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {

    @Override
    public List<User> getUsers() {
        return getSqlSession().getMapper(UserMapper.class).getUsers();
    }
}

6、测试

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import top.sencom.mapper.UserMapper;
import top.sencom.mapper.UserMapperImpl;
import top.sencom.mapper.UserMapperImpl2;
import top.sencom.pojo.User;


public class MyTest {

    @Test
    public void testOne() {

        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMapper userMapper = context.getBean("userMapper", UserMapperImpl.class);
        for (User user : userMapper.getUsers()) {
            System.out.println(user.toString());
        }
    }

    @Test
    public void testTwo(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMapper userMapper = context.getBean("userMapper2", UserMapperImpl2.class);
        for (User user : userMapper.getUsers()) {
            System.out.println(user.toString());
        }
    }
}

 

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