1. TIL
POSTMAN : 요청과 응답 결과 확인 테스트를 위한 도구
https://www.postman.com/downloads/
Session을 얻는 방법 2가지
1. Controller의 파라미터로 HttpSession session을 받음
2. @SessionAttributes({"grade"}) Session에 대한 제어가 Spring Context로 넘어감
Controller의 파라미터로 SessionStatus status를 받음 (spring context가 관리하는 세션)
A. Cookie, Session
Cookie 흐름 : index,jsp → SessionCookieController → cookieView
Session 흐름 : index,jsp → SessionCookieController → sessionView → SessionCookieController (gradeDelete, sessionDelete)
SessionDTO 흐름 : index,jsp → SessionCookieController → sessionView → SessionCookieController (sessionDTOdelete)
DTO
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
@ToString
public class Student {
private String name;
private int age;
}1. index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Index</title>
</head>
<body>
<%
/* Cookie */
Cookie cookie1 = new Cookie("id", "dev");
cookie1.setMaxAge(60 * 60 * 24);
response.addCookie(cookie1);
/* Session */
session.setAttribute("name", "dev");
session.setAttribute("age", 28);
%>
<h1>Cookie, Session</h1>
<a href="cookieTest.do">1. CookieTest.do</a><hr>
<a href="sessionTest1.do">2. SessionTest1.do</a><hr>
<a href="sessionTest2.do?name=spring&age=26">3. SessionTest2.do(DTO)</a>
</body>
</html>2. SessionCookieController
@Controller
@SessionAttributes({"grade", "student"}) // Session에 대한 제어가 Spring Context로 넘어감
public class SessionCookieController {
@RequestMapping(value = "/cookieTest.do", method = RequestMethod.GET)
public String cookieTest(@CookieValue("id") String id) {
return "cookieView";
}
@RequestMapping(value = "/sessionTest1.do", method = RequestMethod.GET)
public String sessionTest1(@SessionAttribute("name") String name,
@SessionAttribute("age") int age,
HttpSession session) {
session.setAttribute("grade", "junior");
return "sessionView";
}
@RequestMapping(value = "/gradeDelete.do", method = RequestMethod.GET)
public String gradeDelete(HttpSession session, SessionStatus status) {
System.out.println(session.getAttribute("grade"));
// HttpSession
if (session != null) {
session.removeAttribute("grade");
}
// SessionStatus
status.setComplete();
return "sessionView";
}
@RequestMapping(value = "/sessionDelete.do", method = RequestMethod.GET)
public String sessionDelete(HttpSession session) {
if (session != null) {
session.invalidate();
}
return "sessionView";
}
// DTO 전달
@RequestMapping(value = "/sessionTest2.do", method = RequestMethod.GET)
public String sessionTest2(Student student) {
System.out.println(student);
return "sessionDTOView";
}
@RequestMapping(value = "/sessionDTODelete.do", method = RequestMethod.GET)
public String sessionDTODelete(SessionStatus status) {
status.setComplete();
return "sessionDTOView";
}
}
3. View (Cookie, Session SessionDTO)
cookie.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>cookieView</title>
</head>
<body>
<h1>Cookie View</h1>
${ cookie.id } - ${ cookie.id.name } - ${ cookie.id.value }
</body>
</html>sessionView.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Session View</title>
</head>
<body>
<h1>Session View</h1>
name : ${sessionScope.name} <br>
age: : ${sessionScope.age}<br>
grade : ${sessionScope.grade}<br>
<hr>
<!-- SessionCookieController -->
<a href="gradeDelete.do">grade 삭제</a><hr>
<a href="sessionDelete.do">모든 세션 삭제</a>
</body>
</html>sessionDTOView.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>SessionDTOView</title>
</head>
<body>
<h1>SessionDTOView</h1>
name : ${sessionScope.student.name}<br>
age : ${sessionScope.student.age} <br>
<hr/>
<a href="sessionDTODelete.do">sessionDTO 삭제</a>
</body>
</html>B. Login Session
Login 흐름 : HomeController → home.jsp → LoginController → login.jsp → LoginController(login, logout) → home.jsp
1. HomeController
@Controller
public class HomeController {
@RequestMapping(value = "/home", method = RequestMethod.GET)
public String home() {
return "home";
}
}2. home.jsp
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page pageEncoding="UTF-8"%>
<html>
<head>
<title>Home</title>
</head>
<body>
<h1>
Hello world!
</h1>
<div align="center">
<!-- 로그인 버튼 클릭 시, login.jsp -->
<c:if test="${empty sessionScope.userId }">
<input type="button" value="로그인" onclick="location.href='/login.do'">
</c:if>
<c:if test="${not empty sessionScope.userId }">
${sessionScope.userId}님
<input type="button" value="로그아웃" onclick="location.href='/logout.do'">
</c:if>
</div>
<c:if test="${not empty sessionScope.userId}">
<P align="center"> The time on the server. </P>
</c:if>
</body>
</html>3. LoginController
@Controller
public class LoginController {
@RequestMapping(value = "/login.do", method = RequestMethod.GET)
public String loginForm() {
return "login";
}
@RequestMapping(value = "/login.do", method = RequestMethod.POST)
public String login(@RequestParam("id") String id,
@RequestParam("pw") String pw,
HttpSession session) {
if("dev".equals(id) && "it".equals(pw)) {
session.setAttribute("userId", id);
}
return "home";
}
@RequestMapping(value = "/logout.do", method = RequestMethod.GET)
public String logout(HttpSession session) {
if(session != null) {
session.invalidate();
}
return "home";
}
}4. login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login</title>
</head>
<body>
<form method="POST" action="login.do">
id : <input type="text" id="" name="id" placeholder="id 입력"/> <br />
pw : <input type="password" id="" name="pw" placeholder="pw 입력"/> <br />
<input type="submit" value="로그인"/>
</form>
</body>
</html>2. 에러
session이나 model을 통해 데이터를 얻어와야 하는데 못받는 경우가 종종 있었음
주말 동안 해결해야할 것으로 보임
3. 보완 해야 할 것
url 전환 시 특정 데이터를 페이지에 전달하려면 model을 사용하는게 맞는건가 아직 모르겠음
request, session을 통해서도 전달할 수 있어서 유지되어야 하는 데이터를 어떤 타입으로 사용해야하는 것에 보안이 필요함
4. 느낀점
Spring은 참 편리하면서 어렵고 손이 많이 가는 것 같다.
하나 하나 배울 때와 배우고나서 최종 구현할 때 갭이 이렇게 클 줄 몰랐다.
잘해볼게요