# 具体遇到的问题

# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

在这里输入代码，可通

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.imooc</groupId>
    <artifactId>mybatis</artifactId>
    <version>1.0-SNAPSHOT</version>
    <repositories>
        <repository>
            <id>aliyun</id>
            <name>aliyun</name>
            <url>http://maven.aliyun.com/repository/public</url>
        </repository>
    </repositories>
    <dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.21</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <version>RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>RELEASE</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

过选择【代码语

package com.imooc.mybatis;

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 java.io.IOException;
import java.io.Reader;
import java.sql.Connection;

//JUNIT单元测试类
public class MyBatisTestor {
    @Test
    public void testSqlSessionFactory() throws IOException {
        Reader reader=Resources.getResourceAsReader("mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);
        System.out.println("SqlSessionFactory加载成功");
        SqlSession sqlSession=null;
        try {
            sqlSession = sqlSessionFactory.openSession();
            Connection connection = sqlSession.getConnection();
            System.out.println(connection);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if (sqlSession!=null){
                sqlSession.close();
            }
        }
    }
    @Test
    public void testMyBatisUtils() throws Exception{
        try {
            SqlSession sqlSession = null;
            sqlSession = MyBatisUtils.openSession();
            Connection connection = sqlSession.getConnection();
            System.out.println(connection);
        }catch (Exception e){
            throw e;
        }finally {
            MyBatisUtils.closeSession(sqlSession);
        }

    }
}

言】突出显示

<?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="dev">
        <environment id="dev">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/babytun?serverTimezone=Hongkong&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;useSSL=false"/>
                <property name="username" value="root"/>
                <property name="password" value="heyuhang"/>
            </dataSource>
        </environment>
    </environments>
</configuration>

package com.imooc.mybatis;

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

import java.io.IOException;
import java.io.Reader;

public class MyBatisUtils {
   private static SqlSessionFactory sqlSessionFactory=null;
   static {
       Reader reader= null;
       try {
           reader = Resources.getResourceAsReader("mybatis-config.xml");
           sqlSessionFactory=new sqlSessionFactoryBuilder().build(reader);
       } catch (IOException e) {
           e.printStackTrace();
           throw new ExceptionInInitializerError(e);
       }
   }

   public static SqlSession openSession() {
       return sqlSessionFactory.openSession();
   }
   public void closeSession(SqlSession session){
       if(session!=null){
           session.close();
       }
   }
}