springboot整合mybatisplus的方法详解

POM：

<dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatis-plus-boot-starter</artifactId>
 <version>3.5.1</version>
</dependency>
<dependency>
 <groupId>mysql</groupId>
 <artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
 <groupId>org.mybatis.spring.boot</groupId>
 <artifactId>mybatis-spring-boot-starter</artifactId>
 <version>2.1.4</version>
</dependency>

如下图所示，mybatis-plus-boot-starter 已经引入了jdbc 所以无需在引入 jdbc的依赖

application.yaml:

只需要 填写数据源配置即可 。

spring:
 datasource:
   url: jdbc:mysql://localhost:3306/kaoyan?serverTimezone=UTC
   password: admin
   username: root
   driver-class-name: com.mysql.cj.jdbc.Driver

POJO：

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
@TableName(value = "user") // 指定查询的表名为 user
public class UserPlus {
   // 以下为 mybatis-plus测试
   private Integer id;
   private String name;
   private Integer age;
   private String email;
}

mapper接口：

特别简洁

package com.hoan.demo03242.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.hoan.demo03242.bean.UserPlus;
public interface UserPlusMapper extends BaseMapper<UserPlus> {
}

包扫描：

测试：

@SpringBootTest
class Demo03242ApplicationTests {
   @Autowired
   UserPlusMapper userPlusMapper;
   @Test
   void contextLoads() {
       UserPlus user = userPlusMapper.selectById(1);
       System.out.println(user.toString());
   }
}

来源：https://blog.csdn.net/qq_44220795/article/details/123729806