목차

./aop/aop

@Aspect
@Component
public class TimeTraceAop {

    @Around("execution(* com.fuckintelli.sibal..*(..))")
    public Object execute(ProceedingJoinPoint joinPoint) throws Throwable{
        long start = System.currentTimeMillis();
        System.out.println("Start: "+joinPoint.toString());
        try{
            return joinPoint.proceed();
        }finally {
            long finish =  System.currentTimeMillis();
            long timeMs = finish-start;
            System.out.println("End: "+joinPoint.toString()+" "+timeMs+"ms");
        }
    }
}

./controller

/HelloController

@Controller
public class HelloController {

	@GetMapping("hello-string")
    @ResponseBody
    public String helloString(@RequestParam("name") String name){
        return "hello" + name;
    }

    @GetMapping("hello-api")
    @ResponseBody
    public Hello helloApi(@RequestParam("name") String name){
        Hello hello = new Hello();
        hello.setName(name);
        return hello;
    }
    
    static class  Hello{
        private String name;
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
    }
}

/MemberController

@Controller
public class MemberController {

    private MemberService memberService;

    @Autowired
    public MemberController(MemberService memberService){
        this.memberService = memberService;
    }

    @GetMapping("/members/new")
    public String createForm(){
        return "members/createMemberForm";
    }

    @PostMapping("members/new")
    public String create(MemberForm form){
        Member member = new Member();
        member.setName(form.getName());
        memberService.join(member);
        return "redirect:/";
    }

     @GetMapping("/members")
    public String list(Model model){
         List<Member> members = memberService.findMembers();
         model.addAttribute("members", members);
         return "members/memberList";
     }
}

./Entity/MemberVO

@Entity
public class Member {

    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;

    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

./repository

MemberRepository(I)

public interface MemberRepository {
    Member save(Member member);
    Optional<Member> findById(Long id);
    Optional<Member> findByName(String name);
    List<Member> findAll();
}

JdbcTemplateMemberRepository

public class JdbcTemplateMemberRepository implements MemberRepository{

    private final JdbcTemplate jdbcTemplate;

    @Autowired
    public JdbcTemplateMemberRepository(DataSource dataSource){
        this.jdbcTemplate = new JdbcTemplate(dataSource);
    }

    @Override
    public Member save(Member member) {
        SimpleJdbcInsert jdbcInsert = new SimpleJdbcInsert(jdbcTemplate);
        jdbcInsert.withTableName("member").usingGeneratedKeyColumns("id");  // generated 요건 pk임

        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 Optional<Member> findByName(String name) {
        List<Member> result = jdbcTemplate.query("select * from member where name = ?", memberRowMapper(), name);
        return result.stream().findAny();
    }

    @Override
    public List<Member> findAll() {
        return jdbcTemplate.query("selec * from member", memberRowMapper());
    }

    private RowMapper<Member> memberRowMapper(){
        return (rs, rowNum) -> {
            Member member = new Member();
            member.setId(rs.getLong("id"));
            member.setName(rs.getString("name"));
            return member;
        };
    }
}

./service/MemberService

@Transactional
public class MemberService {

    private final MemberRepository memberRepository;
    
    public MemberService(MemberRepository memberRepository){
        this.memberRepository = memberRepository;
    }

    // 회원가입
    public Long join(Member member){
        // 같은 이름이 있는 중복 회원 X
        validateDuplicateMember(member);
        memberRepository.save(member);
        return member.getId();
    }

    private void validateDuplicateMember(Member member) {
        memberRepository.findByName(member.getName())
            .ifPresent(m -> {
                throw new IllegalStateException("이미 존재하는 회원입니다.");
            });
    }

    public List<Member> findMembers(){
        return memberRepository.findAll();
    }

    public Optional<Member> findOne(Long memberId){
        return memberRepository.findById(memberId);
    }
}

Config

@Configuration
public class SpringConfig {

	private DataSource dataSource;
	
    @Autowired
	public SpringConfig(DataSource dataSource){this.dataSource = dataSource;}
    
    private final MemberRepository memberRepository;

    @Autowired
    public SpringConfig(MemberRepository memberRepository) {
        this.memberRepository = memberRepository;
    }

    @Bean
    public MemberService memberService(){
        return new MemberService(memberRepository);
    }
    
    @Bean
	public MemberRepository memberRepository(){
        return new JdbcTemplateMemberRepository(dataSource);
    }
}

HTML 양식

<!doctype html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<p th:text="'helo '+${name}">hello! empty</p>
</body>
</html>

test 예시

@SpringBootTest
@Transactional
class MemberServiceTest {

    @Autowired MemberService memberService;
    @Autowired MemberRepository memberRepository;

    @Test
    void 회원가입() {
        // given
        Member member = new Member();
        member.setName("spring");

        // when
        Long saveId = memberService.join(member);

        // then
        Member findMember = memberService.findOne(saveId).get();
        assertThat(member.getName()).isEqualTo(findMember.getName());
    }

    @Test
    public void 중복_회원_예외(){
        // given
        Member member1 = new Member();
        member1.setName("spring");

        Member member2 = new Member();
        member2.setName("spring");

        // when  => 지금 이렇게 하는게 비효율적이라 좋은 문법을 제공한다.
        memberService.join(member1);
        IllegalStateException e = assertThrows(IllegalStateException.class, () -> memberService.join(member2));// 이 exception이 터져야해~ 바로 이 logic을 태울때
        assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
        // then
    }

}