MyBatis-Plus工程创建

1. pom.xml引入依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.3.1.tmp</version>
</dependency>

2. 创建mapper接口

public interface UserMapper extends BaseMapper<User> {

}

3. application.yml配置

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db?useUnicode=true&characterEncoding=UTF-8
    username: root
    password: root
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

4. 启动类需要添加 @MapperScan(“mapper所在的包”)，否则无法加载 Mppaer bean

@SpringBootApplication
@MapperScan("com.kayson.mybatisplus.mapper")
public class MybatisplusApplication {

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

}