yoonseo8167 · yoonseo8167 · Apr 11, 2025
diff --git a/build.gradle b/build.gradle
@@ -26,6 +26,12 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+	//JSP 추가 시작
+	implementation 'org.apache.tomcat.embed:tomcat-embed-jasper'
+	implementation 'jakarta.servlet:jakarta.servlet-api' //스프링부트 3.0 이상
+	implementation 'jakarta.servlet.jsp.jstl:jakarta.servlet.jsp.jstl-api' //스프링부트 3.0 이상
+	implementation 'org.glassfish.web:jakarta.servlet.jsp.jstl' //스프링부트 3.0 이상
+	//JSP 추가 끝
 	compileOnly 'org.projectlombok:lombok'
 	annotationProcessor 'org.projectlombok:lombok'
 	providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'

diff --git a/src/main/java/hello/servlet/domain/member/Member.java b/src/main/java/hello/servlet/domain/member/Member.java
@@ -0,0 +1,21 @@
+package hello.servlet.domain.member;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter @Setter
+public class Member {
+
+    private Long id;
+    private String username;
+    private int age;
+
+    // 기본 생성자
+    public Member() {
+    }
+
+    public Member(String username, int age) {
+        this.username = username;
+        this.age = age;
+    }
+}
diff --git a/src/main/java/hello/servlet/domain/member/MemberRepository.java b/src/main/java/hello/servlet/domain/member/MemberRepository.java
@@ -0,0 +1,44 @@
+package hello.servlet.domain.member;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 동시성 문제가 고려되어 있지 않음, 실무에서는 ConcurrentHashMap, AtomicLong 사용 고려
+ */
+public class MemberRepository {
+
+    private static Map<Long, Member> store = new HashMap<>();
+    private static long sequence = 0L;
+
+    private static final MemberRepository instance = new MemberRepository();
+
+    public static MemberRepository getInstance() {
+        return instance;
+    }
+
+    // 싱글톤일 때는 private 으로 생성자 막아야 함.
+    private MemberRepository() {
+    }
+
+    public Member save(Member member) {
+        member.setId(++sequence);
+        store.put(member.getId(), member);
+        return member;
+    }
+
+    public Member findById(Long id) {
+        return store.get(id);
+    }
+
+    public List<Member> findAll() {
+        return new ArrayList<>(store.values());
+    }
+
+    public void clearStore() {
+        store.clear();
+    }
+}
diff --git a/src/main/java/hello/servlet/web/servlet/MemberFormServlet.java b/src/main/java/hello/servlet/web/servlet/MemberFormServlet.java
@@ -0,0 +1,40 @@
+package hello.servlet.web.servlet;
+
+import hello.servlet.domain.member.MemberRepository;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+@WebServlet(name = "memberFormServlet", urlPatterns = "/servlet/members/new-form")
+public class MemberFormServlet extends HttpServlet {
+
+    private MemberRepository memberRepository = MemberRepository.getInstance();
+
+    @Override
+    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        response.setContentType("text/html");
+        response.setCharacterEncoding("UTF-8");
+
+        PrintWriter w = response.getWriter();
+        w.write("<!DOCTYPE html>\n" +
+                "<html>\n" +
+                "<head>\n" +
+                "   <meta charset=\"UTF-8\">\n" +
+                "   <title>Title</title>\n" +
+                "</head>\n" +
+                "<body>\n" +
+                "<form action=\"/servlet/members/save\" method=\"post\">\n" +
+                "   username: <input type=\"text\" name=\"username\" />\n" +
+                "   age: <input type=\"text\" name=\"age\" />\n" +
+                "   <button type=\"submit\">전송</button>\n" +
+                "</form>\n" +
+                "</body>\n" +
+                "</html>\n");
+    }
+}
diff --git a/src/main/java/hello/servlet/web/servlet/MemberListServlet.java b/src/main/java/hello/servlet/web/servlet/MemberListServlet.java
@@ -0,0 +1,56 @@
+package hello.servlet.web.servlet;
+
+import hello.servlet.domain.member.Member;
+import hello.servlet.domain.member.MemberRepository;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.List;
+
+// 저장된 모든 회원의 목록 조회
+@WebServlet(name = "memberListServlet", urlPatterns = "/servlet/members")
+public class MemberListServlet extends HttpServlet {
+
+    private MemberRepository memberRepository = MemberRepository.getInstance();
+
+    @Override
+    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        List<Member> members = memberRepository.findAll();
+
+        response.setContentType("text/html");
+        response.setCharacterEncoding("UTF-8");
+
+        PrintWriter w = response.getWriter();
+        w.write("<html>");
+        w.write("<head>");
+        w.write("   <meta charset=\"UTF-8\">");
+        w.write("   <title>Title</title>");
+        w.write("</head>");
+        w.write("<body>");
+        w.write("<a href=\"/index.html\">메인</a>");
+        w.write("<table>");
+        w.write("   <thead>");
+        w.write("   <th>id</th>");
+        w.write("   <th>username</th>");
+        w.write("   <th>age</th>");
+        w.write("   </thead>");
+        w.write("   <tbody>");
+        for (Member member : members) {
+            w.write("   <tr>");
+            w.write("   <td>" + member.getId() + "</td>");
+            w.write("   <td>" + member.getUsername() + "</td>");
+            w.write("   <td>" + member.getAge() + "</td>");
+            w.write("   </tr>");
+        }
+        w.write("   </tbody>");
+        w.write("</table>");
+        w.write("</body>");
+        w.write("</html>");
+    }
+}
diff --git a/src/main/java/hello/servlet/web/servlet/MemberSaveServlet.java b/src/main/java/hello/servlet/web/servlet/MemberSaveServlet.java
@@ -0,0 +1,47 @@
+package hello.servlet.web.servlet;
+
+import hello.servlet.domain.member.Member;
+import hello.servlet.domain.member.MemberRepository;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+@WebServlet(name = "MemberSaveServlet", urlPatterns = "/servlet/members/save")
+public class MemberSaveServlet extends HttpServlet {
+
+    private MemberRepository memberRepository = MemberRepository.getInstance();
+
+    @Override
+    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        // html 에서 입력받은 데이터를 읽으려면
+        System.out.println("MemberSaveServlet.service");
+        String username = request.getParameter("username");
+        int age = Integer.parseInt(request.getParameter("age"));
+
+        Member member = new Member(username, age);
+        memberRepository.save(member);
+
+        response.setContentType("text/html");
+        response.setCharacterEncoding("utf-8");
+        PrintWriter w = response.getWriter();
+        w.write("<html>\n" +
+                "<head>\n" +
+                "   <meta charset=\"UTF-8\">\n" +
+                "</head>\n" +
+                "<body>\n" +
+                "성공\n" +
+                "<ul>\n" +
+                "   <li>id="+member.getId()+"</li>\n" +
+                "   <li>username="+member.getUsername()+"</li>\n" +
+                "   <li>age="+member.getAge()+"</li>\n" +
+                "</ul>\n" +
+                "<a href=\"/index.html\">메인</a>\n" +
+                "</body>\n" +
+                "</html>");
+    }
+}
diff --git a/src/main/webapp/index.html b/src/main/webapp/index.html
@@ -8,6 +8,78 @@
 <body>
 <ul>
     <li><a href="basic.html">서블릿 basic</a></li>
+    <li>서블릿
+        <ul>
+            <li><a href="/servlet/members/new-form">회원가입</a></li>
+            <li><a href="/servlet/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>JSP
+        <ul>
+            <li><a href="/jsp/members/new-form.jsp">회원가입</a></li>
+            <li><a href="/jsp/members.jsp">회원목록</a></li>
+        </ul>
+    </li>
+    <li>서블릿 MVC
+        <ul>
+            <li><a href="/servlet-mvc/members/new-form">회원가입</a></li>
+            <li><a href="/servlet-mvc/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>FrontController - v1
+        <ul>
+            <li><a href="/front-controller/v1/members/new-form">회원가입</a></li>
+            <li><a href="/front-controller/v1/members">회원목록</a></li>
+        </ul> </li>
+    <li>FrontController - v2
+        <ul>
+            <li><a href="/front-controller/v2/members/new-form">회원가입</a></li>
+            <li><a href="/front-controller/v2/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>FrontController - v3
+        <ul>
+            <li><a href="/front-controller/v3/members/new-form">회원가입</a></li>
+            <li><a href="/front-controller/v3/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>FrontController - v4
+        <ul>
+            <li><a href="/front-controller/v4/members/new-form">회원가입</a></li>
+            <li><a href="/front-controller/v4/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>FrontController - v5 - v3
+        <ul>
+            <li><a href="/front-controller/v5/v3/members/new-form">회원가입</a></
+            li>
+            <li><a href="/front-controller/v5/v3/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>FrontController - v5 - v4
+        <ul>
+            <li><a href="/front-controller/v5/v4/members/new-form">회원가입</a></
+            li>
+            <li><a href="/front-controller/v5/v4/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>SpringMVC - v1
+        <ul>
+            <li><a href="/springmvc/v1/members/new-form">회원가입</a></li>
+            <li><a href="/springmvc/v1/members">회원목록</a></li>
+        </ul>
+    </li>
+    <li>SpringMVC - v2
+        <ul>
+            <li><a href="/springmvc/v2/members/new-form">회원가입</a></li>
+            <li><a href="/springmvc/v2/members">회원목록</a></li> </ul>
+    </li>
+    <li>SpringMVC - v3
+        <ul>
+            <li><a href="/springmvc/v3/members/new-form">회원가입</a></li>
+            <li><a href="/springmvc/v3/members">회원목록</a></li>
+        </ul>
+    </li>
 </ul>
 </body>
 </html>
diff --git a/src/main/webapp/jsp/members.jsp b/src/main/webapp/jsp/members.jsp
@@ -0,0 +1,34 @@
+<%@ page import="hello.servlet.domain.member.MemberRepository" %>
+<%@ page import="hello.servlet.domain.member.Member" %>
+<%@ page import="java.util.List" %>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%
+  MemberRepository memberRepository = MemberRepository.getInstance();
+  List<Member> members = memberRepository.findAll();
+%>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+<a href="/index.html">메인</a>
+<table>
+    <thead> <th>id</th>
+    <th>username</th>
+    <th>age</th>
+    </thead>
+    <tbody>
+    <%
+      for (Member member : members) {
+        out.write(" <tr>\n");
+        out.write("   <td>" + member.getId() + "</td>\n");
+        out.write("   <td>" + member.getUsername() + "</td>\n");
+        out.write("   <td>" + member.getAge() + "</td>\n");
+        out.write(" </tr>\n");
+      }
+    %>
+    </tbody>
+</table>
+</body>
+</html>
diff --git a/src/main/webapp/jsp/members/new-form.jsp b/src/main/webapp/jsp/members/new-form.jsp
@@ -0,0 +1,13 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Title</title>
+</head>
+<body>
+<form action="/jsp/members/save.jsp" method="post">
+    username: <input type="text" name="username" />
+    age:      <input type="text" name="age" />
+    <button type="submit">전송</button>
+</form>
+</body>
+</html>
diff --git a/src/main/webapp/jsp/members/save.jsp b/src/main/webapp/jsp/members/save.jsp
@@ -0,0 +1,29 @@
+<%@ page import="hello.servlet.domain.member.Member" %>
+<%@ page import="hello.servlet.domain.member.MemberRepository" %>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%
+
+    // request, response 사용 가능
+    MemberRepository memberRepository = MemberRepository.getInstance();
+
+    System.out.println("MemberSaveServlet.service");
+    String username = request.getParameter("username");
+    int age = Integer.parseInt(request.getParameter("age"));
+
+    Member member = new Member(username, age);
+    memberRepository.save(member);
+%>
+<html>
+<head>
+    <title>Title</title>
+</head>
+<body>
+성공
+<ul>
+    <li>id=<%=member.getId()%></li>
+    <li>username=<%=member.getUsername()%></li>
+    <li>age=<%=member.getAge()%></li>
+</ul>
+<a href="/index.html">메인</a>
+</body>
+</html>