使用Intellij Idea创建 mybatis maven项目

<dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>

<dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>

<resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>

<?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>

    <properties resource="com/codingdict/data/db.properties">
        <property name="driver" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3308/mybatis_db"/>
    </properties>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>

</configuration>

package com.codingdict.data;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

public class DbUtil {
    private static SqlSessionFactory sqlSessionFactory;
    public static SqlSessionFactory getSqlSessionFactory() {
        if(sqlSessionFactory!=null){
            return sqlSessionFactory;
        }else{
            String resource = "com/codingdict/data/mybatis-config.xml";
            InputStream inputStream = null;
            try {
                inputStream = Resources.getResourceAsStream(resource);
            } catch (IOException e) {
                e.printStackTrace();
            }
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            return sqlSessionFactory;
        }
    }

}

package com.codingdict.data;

import com.codingdict.data.DbUtil;
import com.mysql.jdbc.Driver;
import org.apache.ibatis.session.SqlSessionFactory;

public class App {
    public static void main(String[] args) {
        SqlSessionFactory factory = DbUtil.getSqlSessionFactory();
        System.out.println(factory);
    }
}