Spring整合Mybatis方式一

1、User

package com.zhang.pojo;
import lombok.Data;
@Data
public class User {
    private  int id;
    private  String  name;
    private  String pwd;
}

2、UserMapper.java

package com.zhang.mapper;
import com.zhang.pojo.User;
import java.util.List;

public interface UserMapper {
    public List<User> selectUser();
}

UserMapper.xml

<?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="com.zhang.mapper.UserMapper">
    <select id="selectUser" parameterType="int" resultType="User">
        select * from  user
    </select>
</mapper>

UserMapperImpl.java

<?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="com.zhang.mapper.UserMapper">
    <select id="selectUser" parameterType="int" resultType="User">
        select * from  user
    </select>
</mapper>

3、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" 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">
         <!-- spring 整合 mybatis-->
        <!--DataSource 使用Spring的数据源替换mybatis -->
        <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
            <property name="url" value="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=UTF-8"></property>
            <property name="username" value="root"/>
            <property name="password" value="1234"/>
        </bean>
       <!-- sqlSessionFactory-->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="datasource"></property>
            <!--绑定mybatis配置文件 -->
            <property name="configLocation" value="classpath:mybatis-config.xml"></property>
            <property name="mapperLocations" value="classpath:com/zhang/mapper/*.xml"></property>
        </bean>
        <!-- sqlSessionTemplate:通过它获取sqlSession-->
        <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
            <!-- 只能通过构造器注入，因为它没有set方法-->
            <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
        </bean>
        <bean id="UserMapper" class="com.zhang.mapper.UserMapperImpl">
            <property name="sqlSession" ref="sqlSession"></property>
        </bean>
</beans>

4、MyTest.java

import com.zhang.mapper.UserMapper;
import com.zhang.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
import java.io.InputStream;

public class MyTest {
    @Test
    public void test() throws IOException {
        /*
        String resource = "mybatis-config.xml";
        InputStream resourceAsStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
        SqlSession session = sessionFactory.openSession(true);

        UserMapper mapper = session.getMapper(UserMapper.class);
        for (User user : mapper.selectUser()) {
            System.out.println("用户名："+user.getId()+" 姓名："+user.getName()+" 密码："+user.getPwd());
        }
        */
        ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
        UserMapper mapper = context.getBean("UserMapper",UserMapper.class);
        for (User user : mapper.selectUser()  ) {
            System.out.println(user);
        }
    }
}

5、执行结果

6、项目整体目录结构
6.1整体步骤：
1）编写数据源配置信息
2）在xml中配置sqlSessionFactory
3）在xml中配置sqlSessionTemplate
4）需要给接口添加实现类
5）将实现类注入到spring中
6）测试类测试
6.2 jar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>3.5.2</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>5.1.9.RELEASE</version>
         </dependency>
         <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>1.9.6</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.10</version>
        </dependency>
    </dependencies>