<!-- mybatis-plus --><dependency>    <groupId>com.baomidou</groupId>    <artifactId>mybatis-plus-boot-starter</artifactId>    <version>3.5.3.1</version></dependency>

public class MyServiceImpl extends ServiceImpl<UserDataPoMapper,UserDataPo> implements MyService

LambdaQueryWrapper<UserDataPo> wrapper = new LambdaQueryWrapper<>();wrapper.eq(UserDataPo::getId, id);List<UserDataPo> userDataPoList = userDataPoMapper.selectList(wrapper);