一、mybatis-plus导入依赖

SpringBoot2导入依赖

java"><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.7</version>
</dependency>

SpringBoot3导入依赖

java"><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-spring-boot3-starter</artifactId><version>3.5.7</version>
</dependency>

注意：导入MyBatis-Plus依赖后不要在导入MyBatis依赖了，为了避免版本差异导致的问题。

二、配置

java">@SpringBootApplication
@MapperScan("com.wedu.dao")
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}}

三、接口介绍

3.1 接口导入idea中实现

创建dao类继承BaseMapper接口

java">package com.wedu.dao;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.wedu.domian.Book;
import org.apache.ibatis.annotations.Mapper;//告诉MyBatis生成这个接口的代理对象，代理对象会实现接口中定义的数据库访问操作
//可以让你完全省略XML配置
@Mapper
public interface BookDao extends BaseMapper<Book> {}

创建service类继承IService接口

java">package com.wedu.service;import com.baomidou.mybatisplus.extension.service.IService;
import com.wedu.domian.Book;public interface BookService extends IService<Book>{
}

创建service类的实现类

java">package com.wedu.service.impl;import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.wedu.dao.BookDao;
import com.wedu.domian.Book;
import com.wedu.service.BookService;import org.springframework.stereotype.Service;