[MVC 구현 - 3단계] 스플릿-박상현 미션 제출합니다.

app/src/main/java/com/techcourse/DispatcherServletInitializer.java

@@ -4,10 +4,13 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import web.org.springframework.web.WebApplicationInitializer;
+import webmvc.org.springframework.web.servlet.mvc.tobe.DispatcherServlet;
+import webmvc.org.springframework.web.servlet.mvc.tobe.handleradapter.AnnotationHandlerAdapter;
+import webmvc.org.springframework.web.servlet.mvc.tobe.handlermapping.AnnotationHandlerMapping;
 
 /**
- * Base class for {@link WebApplicationInitializer}
- * implementations that register a {@link DispatcherServlet} in the servlet context.
+ * Base class for {@link WebApplicationInitializer} implementations that register a {@link DispatcherServlet} in the
+ * servlet context.
  */
 public class DispatcherServletInitializer implements WebApplicationInitializer {
 
@@ -17,12 +20,16 @@ public class DispatcherServletInitializer implements WebApplicationInitializer {
 
     @Override
     public void onStartup(final ServletContext servletContext) {
+        final String packageName = getClass().getPackageName();
         final var dispatcherServlet = new DispatcherServlet();
 
+        dispatcherServlet.addHandlerMapping(new AnnotationHandlerMapping(packageName));
+        dispatcherServlet.addHandlerAdapter(new AnnotationHandlerAdapter());
+        dispatcherServlet.addExceptionHandlerMapping(new NotFoundResponseHandler());
         final var registration = servletContext.addServlet(DEFAULT_SERVLET_NAME, dispatcherServlet);
         if (registration == null) {
             throw new IllegalStateException("Failed to register servlet with name '" + DEFAULT_SERVLET_NAME + "'. " +
-                    "Check if there is another servlet registered under the same name.");
+                "Check if there is another servlet registered under the same name.");
         }
 
         registration.setLoadOnStartup(1);

app/src/main/java/com/techcourse/NotFoundResponseHandler.java

@@ -0,0 +1,33 @@
+package com.techcourse;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.util.Objects;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.mvc.tobe.exceptionhandlermapping.ExceptionHandler;
+import webmvc.org.springframework.web.servlet.view.JspView;
+
+public class NotFoundResponseHandler implements ExceptionHandler {
+
+    private static final int NOT_FOUND_STATUS_CODE = 404;
+
+    private String viewName;
+
+    @Override
+    public void initialize() {
+        this.viewName = "404.jsp";
+    }
+
+    @Override
+    public boolean isHandleable(final HttpServletRequest request, final HttpServletResponse response) {
+        return response.getStatus() == NOT_FOUND_STATUS_CODE;
+    }
+
+    @Override
+    public ModelAndView handle(final HttpServletRequest request) {
+        if (Objects.nonNull(viewName)) {
+            return new ModelAndView(new JspView(viewName));
+        }
+        throw new UnsupportedOperationException();
+    }
+}

app/src/main/java/com/techcourse/controller/HomeController.java

@@ -0,0 +1,20 @@
+package com.techcourse.controller;
+
+import context.org.springframework.stereotype.Controller;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import web.org.springframework.web.bind.annotation.RequestMapping;
+import web.org.springframework.web.bind.annotation.RequestMethod;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.view.JspView;
+
+@Controller
+public class HomeController {
+
+    private static final JspView INDEX_PAGE_VIEW = new JspView("/index.jsp");
+
+    @RequestMapping(value = "/", method = RequestMethod.GET)
+    public ModelAndView home(final HttpServletRequest request, final HttpServletResponse response) {
+        return new ModelAndView(INDEX_PAGE_VIEW);
+    }
+}

app/src/main/java/com/techcourse/controller/LoginController.java

@@ -2,36 +2,42 @@
 
 import com.techcourse.domain.User;
 import com.techcourse.repository.InMemoryUserRepository;
+import context.org.springframework.stereotype.Controller;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
-import webmvc.org.springframework.web.servlet.mvc.asis.Controller;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import web.org.springframework.web.bind.annotation.RequestMapping;
+import web.org.springframework.web.bind.annotation.RequestMethod;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.View;
+import webmvc.org.springframework.web.servlet.view.JspView;
 
-public class LoginController implements Controller {
+@Controller
+public class LoginController {
 
     private static final Logger log = LoggerFactory.getLogger(LoginController.class);
+    private static final View REDIRECT_UNAUTHORIZED_VIEW = new JspView("redirect:/401.jsp");
+    private static final JspView REDIRECT_INDEX_PAGE_VIEW = new JspView("redirect:/index.jsp");
 
-    @Override
-    public String execute(final HttpServletRequest req, final HttpServletResponse res) throws Exception {
+    @RequestMapping(value = "/login", method = RequestMethod.POST)
+    public ModelAndView login(final HttpServletRequest req, final HttpServletResponse res) {
         if (UserSession.isLoggedIn(req.getSession())) {
-            return "redirect:/index.jsp";
+            return new ModelAndView(REDIRECT_INDEX_PAGE_VIEW);
         }
-
         return InMemoryUserRepository.findByAccount(req.getParameter("account"))
-                .map(user -> {
-                    log.info("User : {}", user);
-                    return login(req, user);
-                })
-                .orElse("redirect:/401.jsp");
+            .map(user -> checkUser(req, user))
+            .orElse(new ModelAndView(REDIRECT_UNAUTHORIZED_VIEW));
     }
 
-    private String login(final HttpServletRequest request, final User user) {
+    private ModelAndView checkUser(final HttpServletRequest request, final User user) {
+        log.info("User : {}", user);
+
         if (user.checkPassword(request.getParameter("password"))) {
             final var session = request.getSession();
             session.setAttribute(UserSession.SESSION_KEY, user);
-            return "redirect:/index.jsp";
+            return new ModelAndView(REDIRECT_INDEX_PAGE_VIEW);
         }
-        return "redirect:/401.jsp";
+        return new ModelAndView(REDIRECT_UNAUTHORIZED_VIEW);
     }
 }

app/src/main/java/com/techcourse/controller/LoginViewController.java

@@ -1,22 +1,31 @@
 package com.techcourse.controller;
 
+import context.org.springframework.stereotype.Controller;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import webmvc.org.springframework.web.servlet.mvc.asis.Controller;
+import web.org.springframework.web.bind.annotation.RequestMapping;
+import web.org.springframework.web.bind.annotation.RequestMethod;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.View;
+import webmvc.org.springframework.web.servlet.view.JspView;
 
-public class LoginViewController implements Controller {
+@Controller
+public class LoginViewController {
+
+    private static final View LOGIN_PAGE_VIEW = new JspView("redirect:/login.jsp");
+    private static final JspView REDIRECT_INDEX_PAGE_VIEW = new JspView("redirect:/index.jsp");
 
     private static final Logger log = LoggerFactory.getLogger(LoginViewController.class);
 
-    @Override
-    public String execute(final HttpServletRequest req, final HttpServletResponse res) throws Exception {
+    @RequestMapping(value = "/login/view", method = RequestMethod.GET)
+    public ModelAndView showLoginPage(final HttpServletRequest req, final HttpServletResponse res) {
         return UserSession.getUserFrom(req.getSession())
-                .map(user -> {
-                    log.info("logged in {}", user.getAccount());
-                    return "redirect:/index.jsp";
-                })
-                .orElse("/login.jsp");
+            .map(user -> {
+                log.info("logged in {}", user.getAccount());
+                return new ModelAndView(REDIRECT_INDEX_PAGE_VIEW);
+            })
+            .orElse(new ModelAndView(LOGIN_PAGE_VIEW));
     }
 }

app/src/main/java/com/techcourse/controller/LogoutController.java

@@ -1,15 +1,22 @@
 package com.techcourse.controller;
 
+import context.org.springframework.stereotype.Controller;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
-import webmvc.org.springframework.web.servlet.mvc.asis.Controller;
+import web.org.springframework.web.bind.annotation.RequestMapping;
+import web.org.springframework.web.bind.annotation.RequestMethod;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.view.JspView;
 
-public class LogoutController implements Controller {
+@Controller
+public class LogoutController {
 
-    @Override
-    public String execute(final HttpServletRequest req, final HttpServletResponse res) throws Exception {
+    private static final JspView REDIRECT_HOME_PAGE_VIEW = new JspView("redirect:/");
+
+    @RequestMapping(value = "/logout", method = RequestMethod.POST)
+    public ModelAndView logout(final HttpServletRequest req, final HttpServletResponse res) {
         final var session = req.getSession();
         session.removeAttribute(UserSession.SESSION_KEY);
-        return "redirect:/";
+        return new ModelAndView(REDIRECT_HOME_PAGE_VIEW);
     }
 }

app/src/main/java/com/techcourse/controller/RegisterController.java

@@ -13,13 +13,6 @@
 @Controller
 public class RegisterController {
 
-    @RequestMapping(value = "/register", method = RequestMethod.GET)
-    public ModelAndView show(final HttpServletRequest req, final HttpServletResponse res) {
-        final String redirectViewName = "redirect:register.jsp";
-
-        return new ModelAndView(new JspView(redirectViewName));
-    }
-
     @RequestMapping(value = "/register", method = RequestMethod.POST)
     public ModelAndView registerUser(final HttpServletRequest req, final HttpServletResponse res) {
         final String redirectViewName = "redirect:/index.jsp";
@@ -30,9 +23,9 @@ public ModelAndView registerUser(final HttpServletRequest req, final HttpServlet
 
     private void saveUser(final HttpServletRequest request) {
         final var user = new User(
-            request.getParameter("account"),
-            request.getParameter("password"),
-            request.getParameter("email")
+                request.getParameter("account"),
+                request.getParameter("password"),
+                request.getParameter("email")
         );
         InMemoryUserRepository.save(user);
     }

app/src/main/java/com/techcourse/controller/RegisterViewController.java

@@ -1,13 +1,20 @@
 package com.techcourse.controller;
 
+import context.org.springframework.stereotype.Controller;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
-import webmvc.org.springframework.web.servlet.mvc.asis.Controller;
+import web.org.springframework.web.bind.annotation.RequestMapping;
+import web.org.springframework.web.bind.annotation.RequestMethod;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.view.JspView;
 
-public class RegisterViewController implements Controller {
+@Controller
+public class RegisterViewController {
 
-    @Override
-    public String execute(final HttpServletRequest req, final HttpServletResponse res) throws Exception {
-        return "/register.jsp";
+    private static final JspView REGISTER_PAGE_VIEW = new JspView("/register.jsp");
+
+    @RequestMapping(value = "/register/view", method = RequestMethod.GET)
+    public ModelAndView showRegisterPage(final HttpServletRequest req, final HttpServletResponse res) {
+        return new ModelAndView(REGISTER_PAGE_VIEW);
     }
 }