[자바/스프링] 회원 관리 예제

쉬운 목차

멤버 관리 예제 – 웹 MVC 개발

회원 웹 기능 – 홈 화면 추가
회원을 위한 웹 기능 – 등록
회원을 위한 웹 기능 – 검색

1. 멤버스 웹 기능 – 홈 화면 추가

컨트롤러/HomeController.java

package hello.hellospring.controller;

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

@Controller
public class HomeController {

    @GetMapping("/") // localhost:8080/
    public String home() {
        return "home"; // home.html 리턴
    }

}

템플릿/home.html

'추천 관련글,

<!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="http://devje.members/new">회원 가입</a>
            <a href="http://devje.members">회원 목록</a>
        </p>
    </div> <!-- /container   -->

</div>

</body>
</html>

2. 회원 웹 기능 – 등록

컨트롤러/MemberController.java

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;

    /* 생성자 */
    @Autowired // 스프링이 컨테이너에 있는 Memberservice를 가져다가 연결을 시켜준다. (Dependency Injection)
    public MemberController(MemberService memberService) {
        this.memberService = memberService;
    }

    💡 추가
    @GetMapping("http://devje.members/new")
    public String createForm() {
        return "members/createMemberForm";
    }
}

템플릿/구성원/createMemberForm.html

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

<body>

<div class="container">
    <form action="http://devje.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>

컨트롤러/MemberForm.java

package hello.hellospring.controller;

public class MemberForm {
    private String name;

    public String getName() {
        return name;
    }

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

컨트롤러/MemberController.java

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;

    /* 생성자 */
    @Autowired // 스프링이 컨테이너에 있는 Memberservice를 가져다가 연결을 시켜준다. (Dependency Injection)
    public MemberController(MemberService memberService) {
        this.memberService = memberService;
    }

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

    💡 추가
    @PostMapping("http://devje.members/new")
    public String create(MemberForm form) {
        Member member = new Member();
        member.setName(form.getName());

        memberService.join(member);

        return "redirect:/";
    }
}

홈으로 이동하려면 “/”로 리디렉션합니다.

3. 회원 웹 기능 – 검색

컨트롤러/MemberController.java

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;

    /* 생성자 */
    @Autowired // 스프링이 컨테이너에 있는 Memberservice를 가져다가 연결을 시켜준다. (Dependency Injection)
    public MemberController(MemberService memberService) {
        this.memberService = memberService;
    }

    @GetMapping("http://devje.members/new") // 기본적으로 url 치는 건 GetMapping (조회 등)
    public String createForm() {
        return "members/createMemberForm";
    }

    @PostMapping("http://devje.members/new") // PostMapping은 데이터를 폼 같은 데에 넣어서 전달할 때 사용 (데이터 등록)
    public String create(MemberForm form) {
        Member member = new Member();
        member.setName(form.getName());

        System.out.println("member = " + member.getName());

        memberService.join(member);

        return "redirect:/";
    }

    💡 추가
    @GetMapping("/members")
    public String list(Model model) {
        List<Member> members = memberService.findMembers();
        model.addAttribute("members", members); // model에 데이터를 담을 때 addAttribute() 메소드를 사용함. 담아서 화면으로 넘길 것.
        return "members/memberList";
    }

}

templates/members/memberList.html

<!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>
            <!-- ${members} 모델 안에 있는 값을 꺼내는 것 -->
            <!-- th:each 라고 하면 루프를 도는 것 -->
            <tr th:each="member: ${members}">
                <td th:text="${member.id}"></td>
                <td th:text="${member.name}"></td>
            </tr>
            </tbody>

        </table>
    </div>
</div>

</body>
</html>

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