[김영한 스프링] 16. 스프링 JdbcTemplate

package hello.hellospring.repository;

import hello.hellospring.domain.Member;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.simple.SimpleJdbcInsert;

import javax.sql.DataSource;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

public class JdbcTemplateMemberRepository implements MemberRepository {
   
    private final JdbcTemplate jdbcTemplate;
    
    public JdbcTemplateMemberRepository(DataSource dataSource) {
        jdbcTemplate = new JdbcTemplate(dataSource);
    }
    
    @Override
    public Member save(Member member) {
        SimpleJdbcInsert jdbcInsert = new SimpleJdbcInsert(jdbcTemplate);
        jdbcInsert.withTableName("member").usingGeneratedKeyColumns("id");
        
        Map<String, Object> parameters = new HashMap<>();
        parameters.put("name", member.getName());
        
        Number key = jdbcInsert.executeAndReturnKey(new MapSqlParameterSource(parameters));
        member.setId(key.longValue());
        return member;
    }
    
    @Override
    public Optional<Member> findById(Long id) {
        List<Member> result = jdbcTemplate.query("select * from member where id = ?", memberRowMapper(), id);
        return result.stream().findAny();
    }
    
    @Override
    public List<Member> findAll() {
        return jdbcTemplate.query("select * from member", memberRowMapper());
    }
    
    @Override
    public Optional<Member> findByName(String name) {
        List<Member> result = jdbcTemplate.query("select * from member where name = ?", memberRowMapper(), name);
        return result.stream().findAny();
    }
    
    private RowMapper<Member> memberRowMapper() {
        return (rs, rowNum) -> {
            Member member = new Member(); member.setId(rs.getLong("id"));
            member.setName(rs.getString("name"));
            return member;
        };
    }
}

hello.hellospring/repository/JdbcTemplateMemberRepository생성

 

SimpleJdbcInsert는 sql을 작성하지 않아도 됨

withTableName : 테이블명

usingGeneratedKeyColumns : pk컬럼명

map에 insert시 사용할 컬럼을 넣어줌

 

return new JdbcTemplateMemberRepository(dataSource);로 변경

 

테스트 성공

 

출처 : https://www.inflearn.com/course/%EC%8A%A4%ED%94%84%EB%A7%81-%EC%9E%85%EB%AC%B8-%EC%8A%A4%ED%94%84%EB%A7%81%EB%B6%80%ED%8A%B8

[무료] 스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술 - 인프런 | 강의