1.导入依赖 <dependency>    <groupId> com.baomidou </groupId>    <artifactId> mybatis-plus-boot-starter </artifactId>    <version> 3.2.0 </version> </dependency>   2. 导入数据库驱动 https://mvnrepository.com/artifact/mysql/mysql-connector-java <!-- 导入 mysql 驱动 --> <dependency>    <groupId> mysql </groupId>    <artifactId> mysql-connector-java </artifactId>    <version> 8.0.17 </version> </dependency>   3. 在 application.yml 配置数据源相关信息 spring:   datasource:     username: root     password: root     url: jdbc:mysql://****     driver-class-name: com.mysql.jdbc.Driver mybatis-plus: # mapper 文件扫描   mapper-locations: classpath*:/mapper/**/*.xml   global-config:      db-config:        id-type: auto # 数据库主键自增   4.配置 MyBatis-Plus 包扫描：    1. 使用 @MapperScan    2. 告诉 MyBatis-Plus,Sql 映射文件位置 @MapperScan ( "com.***.dao" ) @SpringBootApplication public class Test Application { public static void main (String[] args) { SpringApplication.run(TestApplication. class , args ); } } 具体过程参考官网： https://baomidou.com/guide/install.html#release