导包

<!--数据库驱动-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

<!--连接池-->
<!--<dependency>-->
<!--<groupId>org.springframework.boot</groupId>-->
<!--<artifactId>spring-boot-starter-jdbc</artifactId>-->
<!--</dependency>-->
<!--mybatis -->
<!--<dependency>-->
    <!--<groupId>org.mybatis.spring.boot</groupId>-->
    <!--<artifactId>mybatis-spring-boot-starter</artifactId>-->
    <!--<version>1.3.2</version>-->
<!--</dependency>-->
<!--通用mapper,依赖导入了以上两个启动器-->
<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper-spring-boot-starter</artifactId>
    <version>2.1.5</version>
</dependency>

启动器

package com.company;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;

@SpringBootApplication
@MapperScan("com.company.mapper")//扫描接口，注意要使用通用Mapper包的注解
public class BootDemoApplication {

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

配置application.yaml

　　

#配置com.zaxxer:HikariCP:3.4.1连接池
  spring:
    datasource:
      driver-class-name: com.mysql.jdbc.Driver
      url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT
      username: root
      password: root

#整合mybatis
  mybatis:
    #启用别名,配置实体类路径
    type-aliases-package: com.company.pojo

接口

package com.company.mapper;

import com.company.pojo.User;
import tk.mybatis.mapper.common.Mapper;
//继承通用Mapper的Mapper接口，指定泛型为对应实体类
public interface UserMapper extends Mapper<User>{
}

这样通用Mapper就会生成单表的通用方法及sql

 当你引入

spring-boot-starter-jdbc启动器的时候
SpringBoot就已经为我们配置好事务控制了，只需要在service中需要事务的方法上加上@Transactional注解即可

SpringBoot整合通用Mapper（MyBatis）