第一步：
创建MybatisUtils工具包/类

第二步，写mybatisuntils的映射xml

第三步：
创建pojo类，要使用的对象
有参数无参构造方法tostring
第四步：写接口
user接口

第五步：写上接口的映射文件
也就是增删改查的方法

第六步：写测试类

<dependencies>
        <!--    mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>
        <!--   mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
        <!--    junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>
    </dependencies>

注意事项: **

1.增删改。一定要写上提交事务，否则不会提交成功**. *

2.设置资源目录，在这里一定要注意，在这里踩坑找错误找了半天！！！ false一定要设置为false

            **** 设定主资源目录也可以在子依赖下写一份****

<?xml version="1.0" encoding="UTF-8"?>

4.0.0

<groupId>com.yong</groupId>
<artifactId>Mybatis-Study</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
    <module>mybatis</module>
</modules>
<!--导入依赖-->
<dependencies>
    <!--    mysql驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.26</version>
    </dependency>
    <!--   mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.7</version>
    </dependency>
    <!--    junit-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13.2</version>
    </dependency>
</dependencies>
<build>
    <resources>
        <resource>
            <!-- 设定主资源目录  -->
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
        </resource>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>