1. 在maven项目中添加pom配置信息
   导入配置

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.16</version>
        </dependency>

添加插件：

<build>
        <finalName>${name}</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.16</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <!--允许移动生成的文件 -->
                    <verbose>true</verbose>
                    <!-- 是否覆盖 -->
                    <overwrite>true</overwrite>
                    <!-- 自动生成的配置 -->
                    <configurationFile>
                        src/main/resources/mybatis-generator.xml
                    </configurationFile>
                </configuration>
            </plugin>

        </plugins>
    </build>

2.根据上面自动生成配置文件的路径信息，添加mybatis-generator.xml 生成文件
添加路径：src/main/resources/mybatis-generator.xml
mybatis-generator.xml内容

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>

    <context id="hr" targetRuntime="MyBatis3">
        <property name="suppressAllComments" value="false" />
        <property name="useActualColumnNames" value="false" />

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/user?useUnicode=true&amp;useSSL=false&amp;serverTimezone=UTC"
                        userId="root" password="123456">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <javaModelGenerator targetPackage="com.admin.org.dao.dataobject"
                            targetProject="C:\Users\admin\Desktop\dab\selfDemo\aa\src\main\java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
            <property name="useGeneratedKeys" value="true"/>

        </javaModelGenerator>

        <sqlMapGenerator targetPackage="sqlMap"
                         targetProject="C:\Users\admin\Desktop\dab\selfDemo\aa\src\main\resources\">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.admin.org.dao.mapper"
                             targetProject="C:\Users\admin\Desktop\dab\selfDemo/aa\src\main\java">
            <property name="enableSubPackages" value="true"/>
            <property name="useGeneratedKeys" value="true"/>
        </javaClientGenerator>

        <table tableName="student" domainObjectName="StudentDo"
               enableUpdateByExample="true" enableDeleteByExample="true">
            <generatedKey column="ID" sqlStatement="mysql" identity="true" />
        </table>


    </context>
</generatorConfiguration>

注意：targetPackage 为项目目录名称
targetProject 为自动生成数据库表对应的实体文件名的路径地址

记得在项目启动位置添加 @MapperScan("com.xinzhe.org.dao.mapper")

完成上述操作后，记得在application.yml配置文件中添加 如下配置不然会出现如下错误

mybatis:
  mapper-locations: classpath*:sqlMap/*.xml

image.png

参考示例：

@MapperScan("com.admin.org.dao.mapper")
@SpringBootApplication
public class SelfApplication {

    public static void main(String[] args) {
        SpringApplication.run(SelfApplication.class, args);
    }
}