springboot引入mytais-plus使用

导入依赖，进行属性配置，创建对应pojo，service，mapper，controller

导入相关依赖

        <!--导入mybatis-plus启动器-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>2.3</version>
        </dependency>
        <!--//连接数据库-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>

对应的propertites配置：

server.port=8379
mybatis-plus.global-config.db-column-underline=true
mybatis-plus.global-config.capital-mode=true
mybatis-plus.global-config.map-underscore-to-camel-case=true
spring.datasource.url=jdbc:mysql://localhost:3306/kai?useUnicode=true&characterEncoding=UTF-8&allowPublicKeyRetrieval=true&useSSL=false&&serverTimezone=UTC
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root

pojo层，service层，mapper层

//pojo
@TableName("people")
public class people {
    private static final long serialVersionUID = 1L;
    @TableId
    private Integer id;
    private String name;
    private Integer age;
    private String hobby;
    private Date creatTime;
//mapper
@Mapper
public interface PeopleMapper extends BaseMapper<people> {

}
//service
@Service
public class peopleServiceImpl extends ServiceImpl<PeopleMapper, people> implements peopleService {

}
//service的接口
public interface peopleService extends IService<people> {
}

controller层接口调用测试

@RestController
@RequestMapping("ssss")
public class peopleControlller {


    private final peopleService peopleService;

    public peopleControlller(com.example.springboottest.service.peopleService peopleService) {
        this.peopleService = peopleService;
    }

    @GetMapping
    public people getPeople(@RequestParam("id") int id){
        people people = peopleService.selectById(id);
        return people;
    }
    @GetMapping("pages")
    public Page<people> getPeoples(@RequestParam(name="page",required = false,defaultValue = "1") int page,
                                   @RequestParam(name="pageNo",required = false ,defaultValue = "3") int pageNo){
        return peopleService.selectPage(new Page<>(page,pageNo));
    }

}