一.Mybatis.xml的配置

<?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>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/shop_store"/>
                <property name="username" value="root"/>
                <property name="password" value=""/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="mapper/mapper.xml"/>
    </mappers>
</configuration>

二.mapper.xml文件的配置

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="ming">
      <select id="all" resultType="main.dao.user">
            select * from user
      </select>
</mapper>

三.测试加载mybatis文件

package main.dao;

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.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.List;

public class Test {
    public static void main(String[] args) throws Exception{
        InputStream in=Resources.getResourceAsStream("mybatis.xml");
        SqlSessionFactory factory=new SqlSessionFactoryBuilder().build(in);
        SqlSession session=factory.openSession();
        List<user> list=session.selectList("ming.all");
        for(user p:list){
            System.out.println(p.getUser_name()+" "+p.getNumber());
        }
        session.close();
        in.close();
    }
}