[Spring Boot][1] 5. 회원 관리 예제 - 웹 MVC 개발

sorzzzzy·2021년 8월 10일

Spring Boot - 입문편

목록 보기

5/10

🏷 회원 웹 기능 - 홈 화면 추가

✔️ main/java/hello.hellospring/controller/HomeController.java 생성

package hello.hellospring.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class HomeController {
    // 도메인에 처음 접속하면, home.html이 호출됨
    @GetMapping("/")
    public String home() {
        return "home";
    }

}

✔️ main/resources/template/home.html 생성

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<body>
<div class="container">
  <div>
    <h1>Hello Spring</h1> 
    <p>회원 기능</p>
    <p>
      <a href="/members/new">회원 가입</a>
      <a href="/members">회원 목록</a>
    </p>
  </div>     </div> <!-- /container -->
</body>
</html>

✔️ main/java/hello.hellospring/HelloSpringApplication.java 실행 후 localhost:8080 접속

✔️ 회원가입, 회원목록 링크를 타고 들어가면 에러가 뜸

👉🏻 아직 회원가입, 회원목록 컨트롤러를 만들지 않았기 때문!

📌 이전에 만들었던 웰컴페이지 static/index.html 과 다른 점은 무엇인가?

이처럼 우선순위를 가지는데, 스프링 컨테이너에 관련 컨트롤러가 존재하지 않으면, static으로 간다!

🏷 회원 웹 기능 - 등록

✔️ main/java/hello.hellospring/controller/MemberController.java 수정

package hello.hellospring.controller;
import hello.hellospring.service.MemberService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class MemberController {
    
    private final MemberService memberService;

    public MemberController(MemberService memberService) {
        this.memberService = memberService;
    }
    
    // 추가
    @GetMapping(value = "/members/new")
    public String createForm() {
        return "members/createMemberForm";
    }
}

✔️ main/resources/templates/members/createMemberForm.html 생성

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">

<body>
<div class="container">
    <form action="/members/new" method="post">
        <div class="form-group">
            <label for="name">이름</label>
            <input type="text" id="name" name="name" placeholder="이름을 입력하세요"> </div>
        <button type="submit">등록</button>
    </form>
</div> <!-- /container -->
</body>
</html>

✔️ main/java/hello.hellospring/HelloSpringApplication.java 실행 후 회원 가입 링크 타고 들어가기

👉🏻 이름 칸에 spring을 적고 등록을 누르면 key는 name, value는 spring이 된다!

✔️ main/java/hello.hellospring/controller/MemberForm.java 생성

package hello.hellospring.controller;

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

✔️ main/java/hello.hellospring/controller/MemberController.java 수정

package hello.hellospring.controller;
import hello.hellospring.domain.Member;
import hello.hellospring.service.MemberService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class MemberController {

    private final MemberService memberService;

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

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

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

💡 url은 같더라도 get이냐 post냐에 따라 다르게 맵핑 할 수 있다
@Getmapping : 데이터를 조회할 때 사용
@Postmapping : 데이터를 등록할 때 사용

✔️ main/java/hello.hellospring/HelloSpringApplication.java 실행 후 spring으로 회원가입 하기

👉🏻 다시 홈 화면으로 리다이렉트 됨

회원 웹 기능 - 조회

✔️ main/java/hello.hellospring/controller/MemberController.java 수정

package hello.hellospring.controller;
import hello.hellospring.domain.Member;
import hello.hellospring.service.MemberService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.List;

@Controller
public class MemberController {

    private final MemberService memberService;

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

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

    @PostMapping(value = "/members/new")
    public String create(MemberForm form) {
        Member member = new Member();
        member.setName(form.getName());
        memberService.join(member);
        return "redirect:/";
    }
    // 추가
    @GetMapping(value = "/members")
    public String list(Model model) {
        List<Member> members = memberService.findMembers();
        model.addAttribute("members", members);
        return "members/memberList";
    }
}

✔️ main/resources/templates/members/memberList.html 생성

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<body>
<div class="container">
    <div>
        <table>
            <thead>
            <tr>
                <th>#</th>
                <th>이름</th> </tr>
            </thead>
            <tbody>
            <tr th:each="member : ${members}">
                <td th:text="${member.id}"></td>
                <td th:text="${member.name}"></td>
            </tr>
            </tbody>
        </table>
    </div>
</div> <!-- /container -->
</body>
</html>