基于XML的MyBatis的环境搭建过程详解（IDEA）

<?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="mysql">
  <environment id="mysql">
   <transactionManager type="jdbc"></transactionManager>
   <dataSource type="POOLED">
    <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost:3306/mybatistest?serverTimezone=UTC"/>
    <property name="username" value="root"/>
    <property name="password" value="12345"/>
   </dataSource>
  </environment>
 </environments>

 <mappers>
  <mapper resource="com/lyn/dao/UserDao.xml"/>
 </mappers>
</configuration>

<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.lyn.dao.UserDao">
 <select id="findAll" resultType="com.lyn.pojo.User">
  select * from user
 </select>
</mapper>

package com.lyn.test;

import com.lyn.dao.UserDao;
import com.lyn.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 java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * @author lyn
 * @create 2020-11-09-13:59
 */
public class MyBatisTest {

 public static void main(String[] args) throws IOException {
  InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml");
  SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
  SqlSessionFactory sessionFactory = builder.build(is);
  SqlSession session = sessionFactory.openSession();
  UserDao mapper = session.getMapper(UserDao.class);
  List<User> list = mapper.findAll();
  list.forEach(System.out::println);
 }
}