• 引入jdbcTemplate依赖

<dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-jpa</artifactId>
 </dependency>

• 编写一个类，并将jdbcTemplate直接注入到该类中

@Repository
public class PersonDaoImpl {

    @Resource
    private JdbcTemplate jdbcTemplate;


    public Person findPersonById(long id){
        String sql = "select * from person where id = ?";
        RowMapper<Person> rowMapper = new BeanPropertyRowMapper<Person>(Person.class);
        return jdbcTemplate.queryForObject(sql,rowMapper,id);
    }
}

• 将该类注入至service并调用即可