스프링 MVC 2편

@Bean public MessageSource messageSource() { ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource(); messageSource.setBasenames("messages", "errors"); messageSource.setDefaultEncoding("utf-8"); return messageSource; }

spring.messages.basename=messages,messages_en

//messages.properties hello=안녕 hello.name=안녕 {0} label.item=상품 label.item.id=상품 ID label.item.itemName=상품명 label.item.price=가격 label.item.quantity=수량 label.item.saved=저장 완료 page.items=상품 목록 page.item=상품 상세 page.addItem=상품 등록 page.updateItem=상품 수정 button.save=저장 button.cancle=취소

@SpringBootTest public class MessageSourceTest { @Autowired MessageSource ms; @Test void helloMessage() { String result = ms.getMessage("hello", null, null); assertThat(result).isEqualTo("안녕"); } @Test void argumentMessage() { String message = ms.getMessage("hello.name", new Object[]{"Spring"}, null); assertThat(message).isEqualTo("안녕 Spring"); } @Test void enLang() { assertThat(ms.getMessage("hello", null, Locale.ENGLISH)).isEqualTo("hello"); } ...

<!-- 렌더링 전 --> <div th:text="#{label.item(${item.itemName})}"></div> <!-- 렌더링 후 --> <div>상품</div>

@PostMapping("/add") public String addItem(@ModelAttribute Item item, RedirectAttributes redirectAttributes, Model model) { Map<String, String> errors = new HashMap<>(); //검증 부분 if(!StringUtils.hasText(item.getItemName())) { errors.put("itemName", "상품 이름은 필수입니다."); } if(item.getPrice() == null || item.getPrice() < 1000 || item.getPrice() > 10000000) { errors.put("price", "가격은 1,000 ~ 1,000,000 까지 허용합니다."); } if(item.getQuantity() == null || item.getQuantity() >= 9999) { errors.put("quantity", "수량은 최대 9,999까지 허용합니다."); } if(item.getPrice() != null && item.getQuantity() != null) { int resultPrice = item.getPrice() * item.getQuantity(); if(resultPrice < 10000) { errors.put("globalError", "가격 * 수량의 합은 10,000원 이상이어야 합니다. 현재 값 = " + resultPrice); } } //검증이 실패한 것이 있으면 에러를 모델에 담고 redirect if(!errors.isEmpty()) { model.addAttribute("errors", errors); return "validation/v1/addForm"; } //성공 로직 Item savedItem = itemRepository.save(item); redirectAttributes.addAttribute("itemId", savedItem.getId()); redirectAttributes.addAttribute("status", true); return "redirect:/validation/v1/items/{itemId}"; }

<!-- addForm.html --> <form action="item.html" th:action th:object="${item}" method="post"> <div th:if="${errors?.containsKey('globalError')}"> <p class="field-error" th:text="${errors['globalError']}">전체 오류 메시지</p> </div> <div> <label for="itemName" th:text="#{label.item.itemName}">상품명</label> <input type="text" id="itemName" th:field="*{itemName}" th:class="${errors?.containsKey('itemName')} ? 'form-control field-error' : 'form-control'" class="form-control" placeholder="이름을 입력하세요"> <div class="field-error" th:if="${errors?.containsKey('itemName')}" th:text="${errors['itemName']}">상품명 오류</div> </div> <div> <label for="price" th:text="#{label.item.price}">가격</label> <input type="text" id="price" th:field="*{price}" th:class="${errors?.containsKey('itemName')} ? 'form-control field-error' : 'form-control'" class="form-control" placeholder="가격을 입력하세요"> <div class="field-error" th:if="${errors?.containsKey('price')}" th:text="${errors['price']}">가격 오류</div> </div> <div> <label for="quantity" th:text="#{label.item.quantity}">수량</label> <input type="text" id="quantity" th:field="*{quantity}" th:class="${errors?.containsKey('itemName')} ? 'form-control field-error' : 'form-control'" class="form-control" placeholder="수량을 입력하세요"> <div class="field-error" th:if="${errors?.containsKey('quantity')}" th:text="${errors['quantity']}">수량 오류</div> </div>

if(!StringUtils.hasText(item.getItemName())) { bindingResult.rejectValue("itemName", "required"); } if(item.getPrice() == null || item.getPrice() < 1000 || item.getPrice() > 10000000) { bindingResult.rejectValue("price", "range", new Object[]{1000, 10000000}, null); } if(item.getQuantity() == null || item.getQuantity() >= 9999) { bindingResult.rejectValue("quantity", "max", new Object[]{9999}, null); } if(item.getPrice() != null && item.getQuantity() != null) { int resultPrice = item.getPrice() * item.getQuantity(); if(resultPrice < 10000) { bindingResult.reject("totalPriceMin", new Object[]{10000, resultPrice}, null); } }

#required.item.itemName=상품 이름은 필수입니다. #range.item.price=가격은 {0} ~ {1} 까지 허용합니다. #max.item.quantity=수량은 최대 {0} 까지 허용합니다. #totalPriceMin=가격 * 수량의 합은 {0}원 이상이어야 합니다. 현재 값 = {1} #==ObjectError== #Level1 totalPriceMin.item=상품의 가격 * 수량의 합은 {0}원 이상이어야 합니다. 현재 값 = {1} #Level2 - 생략 totalPriceMin=전체 가격은 {0}원 이상이어야 합니다. 현재 값 = {1} #==FieldError== #Level1 required.item.itemName=상품 이름은 필수입니다. range.item.price=가격은 {0} ~ {1} 까지 허용합니다. max.item.quantity=수량은 최대 {0} 까지 허용합니다. #Level2 - 생략 #Level3 required.java.lang.String = 필수 문자입니다. required.java.lang.Integer = 필수 숫자입니다. min.java.lang.String = {0} 이상의 문자를 입력해주세요. min.java.lang.Integer = {0} 이상의 숫자를 입력해주세요. range.java.lang.String = {0} ~ {1} 까지의 문자를 입력해주세요. range.java.lang.Integer = {0} ~ {1} 까지의 숫자를 입력해주세요. max.java.lang.String = {0} 까지의 문자를 허용합니다. max.java.lang.Integer = {0} 까지의 숫자를 허용합니다. #Level4 required = 필수 값 입니다. min= {0} 이상이어야 합니다. range= {0} ~ {1} 범위를 허용합니다. max= {0} 까지 허용합니다.

//기존 코드 if(!StringUtils.hasText(item.getItemName())) { bindingResult.rejectValue("itemName", "required"); } //ValidationUtils 사용 코드 ValidationUtils.rejectIfEmptyOrWhitespace(bindingResult, "itemName", "required");

//ItemValidator @Component public class ItemValidator implements Validator { @Override public boolean supports(Class<?> clazz) { return Item.class.isAssignableFrom(clazz); } @Override public void validate(Object target, Errors errors) { Item item = (Item) target; if(!StringUtils.hasText(item.getItemName())) { errors.rejectValue("itemName", "required"); } if(item.getPrice() == null || item.getPrice() < 1000 || item.getPrice() > 10000000) { errors.rejectValue("price", "range", new Object[]{1000, 10000000}, null); } if(item.getQuantity() == null || item.getQuantity() >= 9999) { errors.rejectValue("quantity", "max", new Object[]{9999}, null); } if(item.getPrice() != null && item.getQuantity() != null) { int resultPrice = item.getPrice() * item.getQuantity(); if(resultPrice < 10000) { errors.reject("totalPriceMin", new Object[]{10000, resultPrice}, null); } } } }

//ValidationItemController private final ItemValidator itemValidator; ... @PostMapping("/add") public String addItemV5(@ModelAttribute Item item, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) { itemValidator.validate(item, bindingResult); if(bindingResult.hasErrors()) { return "validation/v2/addForm"; } Item savedItem = itemRepository.save(item); redirectAttributes.addAttribute("itemId", savedItem.getId()); redirectAttributes.addAttribute("status", true); return "redirect:/validation/v2/items/{itemId}"; }

@InitBinder public void init(WebDataBinder dataBinder) { dataBinder.addValidators(itemValidator); }

@PostMapping("/add") public String addItemV6(@Validated @ModelAttribute Item item, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) { if(bindingResult.hasErrors()) { return "validation/v2/addForm"; } Item savedItem = itemRepository.save(item); redirectAttributes.addAttribute("itemId", savedItem.getId()); redirectAttributes.addAttribute("status", true); return "redirect:/validation/v2/items/{itemId}"; }

@SpringBootApplication public class ItemServiceApplication implements WebMvcConfigurer { public static void main(String[] args) { SpringApplication.run(ItemServiceApplication.class, args); } @Override public Validator getValidator() { return new ItemValidator(); } }

//Item.java @Data public class Item { private Long id; @NotBlank private String itemName; @NotNull @Range(min = 1000, max = 10000000) private Integer price; @NotNull @Max(9999) private Integer quantity; public Item() { } public Item(String itemName, Integer price, Integer quantity) { this.itemName = itemName; this.price = price; this.quantity = quantity; } }

@Test void beanValidation() { ValidatorFactory factory = Validation.buildDefaultValidatorFactory(); Validator validator = factory.getValidator(); Item item = new Item(); item.setItemName(" "); item.setPrice(0); item.setQuantity(10000); Set<ConstraintViolation<Item>> validations = validator.validate(item); for(ConstraintViolation<Item> validation : validations) { System.out.println("validation = " + validation); System.out.println("validation.getMessage() = " + validation.getMessage()); } }

//private final ItemValidator itemValidator; @PostMapping("/add") public String addItem(@Validated @ModelAttribute Item item, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) { if(bindingResult.hasErrors()) { return "validation/v3/addForm"; } Item savedItem = itemRepository.save(item); redirectAttributes.addAttribute("itemId", savedItem.getId()); redirectAttributes.addAttribute("status", true); return "redirect:/validation/v3/items/{itemId}"; }

@Data @ScriptAssert(lang = "javascript", script = "_this.price * _this.quantity >= 10000") public class Item {

public interface SaveCheck { } public interface UpdateCheck { }

//Item.java @Data @ScriptAssert(lang = "javascript", script = "_this.price * _this.quantity >= 10000") public class Item { @NotNull(groups = UpdateCheck.class) private Long id; @NotBlank(groups = {SaveCheck.class, UpdateCheck.class}) private String itemName; @NotNull(groups = {SaveCheck.class, UpdateCheck.class}) @Range(min = 1000, max = 10000000, groups = {SaveCheck.class, UpdateCheck.class}) private Integer price; @NotNull(groups = {SaveCheck.class, UpdateCheck.class}) @Max(value = 9999, groups = {SaveCheck.class}) private Integer quantity; public Item() { } public Item(String itemName, Integer price, Integer quantity) { this.itemName = itemName; this.price = price; this.quantity = quantity; } }

@PostMapping("/add") public String addItem(@Validated(SaveCheck.class) @ModelAttribute Item item, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) { @PostMapping("/{itemId}/edit") public String edit(@PathVariable Long itemId, @Validated(UpdateCheck.class) @ModelAttribute Item item, BindingResult bindingResult) {

//ItemSaveForm.java @Data public class ItemSaveForm { @NotBlank private String itemName; @NotNull @Range(min = 1000, max = 1000000) private Integer price; @NotNull @Max(value = 9999) private Integer quantity; } //ItemUpdateForm.java @Data public class ItemUpdateForm { @NotNull private Long id; @NotBlank private String itemName; @NotNull @Range(min = 1000, max = 1000000) private Integer price; private Integer quantity; }

//ValidationItemController.java @PostMapping("/add") public String addItem(@Validated @ModelAttribute("item") ItemSaveForm form, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) { if(bindingResult.hasErrors()) { return "validation/v4/addForm"; } Item item = new Item(); item.setItemName(form.getItemName()); item.setPrice(form.getPrice()); item.setQuantity(form.getQuantity()); Item savedItem = itemRepository.save(item); redirectAttributes.addAttribute("itemId", savedItem.getId()); redirectAttributes.addAttribute("status", true); return "redirect:/validation/v4/items/{itemId}"; } @PostMapping("/{itemId}/edit") public String edit(@PathVariable Long itemId, @Validated @ModelAttribute("item") ItemUpdateForm form, BindingResult bindingResult) { if(form.getPrice() != null && form.getQuantity() != null) { int resultPrice = form.getPrice() * form.getQuantity(); if(resultPrice < 10000) { bindingResult.reject("totalPriceMin", new Object[]{10000, resultPrice}, null); } } if(bindingResult.hasErrors()) { return "validation/v4/editForm"; } Item item = new Item(); item.setItemName(form.getItemName()); item.setPrice(form.getPrice()); item.setQuantity(form.getQuantity()); itemRepository.update(itemId, item); return "redirect:/validation/v4/items/{itemId}"; }

@Slf4j @RestController @RequestMapping("/validation/api/items") public class ValidationItemApiController { @PostMapping("/add") public Object addItem(@RequestBody @Validated ItemSaveForm form, BindingResult bindingResult) { log.info("API 컨트롤러 호출"); if(bindingResult.hasErrors()) { log.info("검증 오류 발생 errors={}", bindingResult); return bindingResult.getAllErrors(); } log.info("성공 로직 실행"); return form; } }

//성공 요청 POST http://localhost:8080/validation/api/items/add {"itemName":"hello", "price":1000, "quantity": 10} //결과 {"itemName":"hello", "price":1000, "quantity": 10}

//실패 요청 POST http://localhost:8080/validation/api/items/add {"itemName":"hello", "price":"A", "quantity": 10} //결과 { "timestamp": "2021-04-20T00:00:00.000+00:00", "status": 400, "error": "Bad Request", "message": "", "path": "/validation/api/items/add" }

//검증 오류 요청 POST http://localhost:8080/validation/api/items/add {"itemName":"hello", "price":1000, "quantity": 10000} //결과 [ { "codes": [ "Max.itemSaveForm.quantity", "Max.quantity", "Max.java.lang.Integer", "Max" ], "arguments": [ { "codes": [ "itemSaveForm.quantity", "quantity" ], "arguments": null, "defaultMessage": "quantity", "code": "quantity" }, 9999 ], "defaultMessage": "9999 이하여야 합니다", "objectName": "itemSaveForm", "field": "quantity", "rejectedValue": 10000, "bindingFailure": false, "code": "Max" } ]

<!-- loginForm.html --> <body> <div class="container"> <div class="py-5 text-center"> <h2>로그인</h2> </div> <form action="item.html" th:action th:object="${loginForm}" method="post"> <div th:if="${#fields.hasGlobalErrors()}"> <p class="field-error" th:each="err : ${#fields.globalErrors()}" th:text="${err}">전체 오류 메시지</p> </div> <div> <label for="loginId">로그인 ID</label> <input type="text" id="loginId" th:field="*{loginId}" class="form-control" th:errorclass="field-error"> <div class="field-error" th:errors="*{loginId}" /> </div> <div> <label for="password">비밀번호</label> <input type="password" id="password" th:field="*{password}" class="form-control" th:errorclass="field-error"> <div class="field-error" th:errors="*{password}" /> </div> <hr class="my-4"> <div class="row"> <div class="col"> <button class="w-100 btn btn-primary btn-lg" type="submit">로그인</button> </div> <div class="col"> <button class="w-100 btn btn-secondary btn-lg" onclick="location.href='items.html'" th:onclick="|location.href='@{/}'|" type="button">취소</button> </div> </div> </form> </div> <!-- /container --> </body>

<!-- home.html --> <body> <div class="container" style="max-width: 600px" th:if="${member} == null"> <div class="py-5 text-center"> <h2>홈 화면</h2> </div> <div class="row"> <div class="col"> <button class="w-100 btn btn-secondary btn-lg" type="button" th:onclick="|location.href='@{/members/add}'|"> 회원 가입 </button> </div> <div class="col"> <button class="w-100 btn btn-dark btn-lg" onclick="location.href='items.html'" th:onclick="|location.href='@{/login}'|" type="button"> 로그인 </button> </div> </div> <hr class="my-4"> </div> <!-- /container --> <div class="container" style="max-width: 600px" th:if="${member} != null"> <div class="py-5 text-center"> <h2>홈 화면</h2> </div> <h4 class="mb-3" th:text="|로그인: ${member.name}|">로그인 사용자 이름</h4> <hr class="my-4"> <div class="row"> <div class="col"> <button class="w-100 btn btn-secondary btn-lg" type="button" th:onclick="|location.href='@{/items}'|"> 상품 관리 </button> </div> <div class="col"> <form th:action="@{/logout}" method="post"> <button class="w-100 btn btn-dark btn-lg" type="submit"> 로그아웃 </button> </form> </div> </div> <hr class="my-4"> </div> </body>

//LoginController.java @Slf4j @Controller @RequiredArgsConstructor public class LoginController { private final LoginService loginService; @GetMapping("/login") public String loginForm(@ModelAttribute("loginForm") LoginForm form) { return "login/loginForm"; } @PostMapping("/login") public String login(@Valid @ModelAttribute LoginForm form, BindingResult bindingResult, HttpServletResponse response) { if(bindingResult.hasErrors()) { return "login/loginForm"; } Member loginMember = loginService.login(form.getLoginId(), form.getPassword()); if(loginMember == null) { bindingResult.reject("loginFail", "아이디 또는 비밀번호가 맞지 않습니다."); return "login/loginForm"; } Cookie idCookie = new Cookie("memberId", String.valueOf(loginMember.getId())); response.addCookie(idCookie); return "redirect:/"; } @PostMapping("/logout") public String logout(HttpServletResponse response) { expireCookie(response, "memberId"); return "redirect:/"; } private void expireCookie(HttpServletResponse response, String cookieName) { Cookie cookie = new Cookie(cookieName, null); cookie.setMaxAge(0); response.addCookie(cookie); } }

//LoginService.java @Service @RequiredArgsConstructor public class LoginService { private final MemberRepository memberRepository; public Member login(String loginId, String password) { return memberRepository.findByLoginId(loginId).filter(m -> m.getPassword().equals(password)).orElse(null); } }

//LoginForm.java @Data public class LoginForm { @NotEmpty private String loginId; @NotEmpty private String password; }

//SessionManager.java @Component public class SessionManager { public static final String SESSION_COOKIE_NAME = "mySessionId"; private Map<String, Object> sessionStore = new ConcurrentHashMap<>(); //세션 생성 public void createSession(Object value, HttpServletResponse response) { String sessionId = UUID.randomUUID().toString(); sessionStore.put(sessionId, value); Cookie mySessionCookie = new Cookie(SESSION_COOKIE_NAME, sessionId); response.addCookie(mySessionCookie); } //세션 조회 public Object getSession(HttpServletRequest request) { Cookie sessionCookie = findCookie(request, SESSION_COOKIE_NAME); if(sessionCookie == null) { return null; } return sessionStore.get(sessionCookie.getValue()); } public Cookie findCookie(HttpServletRequest request, String cookieName) { if(request.getCookies() == null) { return null; } return Arrays.stream(request.getCookies()) .filter(cookie -> cookie.getName().equals(cookieName)) .findAny() .orElse(null); } //세션 만료 public void expire(HttpServletRequest request) { Cookie sessionCookie = findCookie(request, SESSION_COOKIE_NAME); if(sessionCookie != null) { sessionStore.remove(sessionCookie.getValue()); } } }

public interface SessionConst { String LOGIN_MEMBER = "loginMember"; }

@GetMapping("/") public String homeLoginV3(HttpServletRequest request, Model model) { HttpSession session = request.getSession(false); if(session == null) { return "home"; } Member loginMember = (Member) session.getAttribute(SessionConst.LOGIN_MEMBER); if(loginMember == null) { return "home"; } model.addAttribute("member", loginMember); return "home"; } @PostMapping("/login") public String loginV3(@Valid @ModelAttribute LoginForm form, BindingResult bindingResult, HttpServletRequest request) { if(bindingResult.hasErrors()) { return "login/loginForm"; } Member loginMember = loginService.login(form.getLoginId(), form.getPassword()); if(loginMember == null) { bindingResult.reject("loginFail", "아이디 또는 비밀번호가 맞지 않습니다."); return "login/loginForm"; } HttpSession session = request.getSession(); session.setAttribute(SessionConst.LOGIN_MEMBER, loginMember); return "redirect:/"; } @PostMapping("/logout") public String logoutV3(HttpServletRequest request) { HttpSession session = request.getSession(false); if(session != null) { session.invalidate(); } return "redirect:/"; }

@GetMapping("/") public String homeLoginV3Spring(@SessionAttribute(name = SessionConst.LOGIN_MEMBER, required = false) Member member, Model model) { if(member == null) { return "home"; } model.addAttribute("member", member); return "home"; }

http://localhost:8080/;jsessionid=F59911518B921DF62D09F0DF8F83F872

session.getAttributeNames().asIterator() .forEachRemaining(name -> log.info("session name = {}, value = {}", name, session.getAttribute(name))); log.info("sessionId = {}", session.getId()); log.info("getMaxInactiveInterval = {}", session.getMaxInactiveInterval()); log.info("creationTime = {}", session.getCreationTime()); log.info("lastAccessedTime = {}", session.getLastAccessedTime()); log.info("isNew = {}", session.isNew());

//글로벌 설정 (application.properties) server.servlet.session.timeout=1800 //특정 세션 설정 session.setMaxInactiveInterval(1800);