모든 View 페이지에 날짜/시간/학번/성명 FOOTER 추가

.gitignore

@@ -1,28 +1,39 @@
 # =====================================================================
 # Maven 빌드 산출물
 # =====================================================================
-target/          # 컴파일 결과, WAR, 테스트 리포트 등 모든 빌드 산출물
-*.class          # target 밖에 생성된 .class 파일 (안전망)
+# 컴파일 결과, WAR, 테스트 리포트 등 모든 빌드 산출물
+target/
+
+# target 밖에 생성된 .class 파일 (안전망)
+*.class
 
 # =====================================================================
 # Docker 데이터
 # =====================================================================
-mysql-data/      # MySQL 컨테이너 데이터 볼륨 (로컬 바인드 마운트)
+# MySQL 컨테이너 데이터 볼륨 (로컬 바인드 마운트)
+mysql-data/
 
 # =====================================================================
 # Claude Code
 # =====================================================================
-.claude/         # Claude Code 설정 및 메모리 파일
+# Claude Code 설정 및 메모리 파일
+.claude/
 
 # =====================================================================
 # IntelliJ IDEA
 # =====================================================================
-.idea/           # IDE 설정 디렉터리 전체
-*.iml            # 모듈 설정 파일
-*.iws            # 워크스페이스 파일
+# IDE 설정 디렉터리 전체
+.idea/
+# 모듈 설정 파일
+*.iml
+# 워크스페이스 파일
+*.iws
 
 # =====================================================================
 # OS 생성 파일
 # =====================================================================
-.DS_Store        # macOS
-Thumbs.db        # Windows
+# macOS
+.DS_Store
+
+# Windows
+Thumbs.db

src/main/java/kr/ac/hansung/cse/config/DbConfig.java

@@ -39,7 +39,7 @@ public class DbConfig {
     public DataSource dataSource() {
         DriverManagerDataSource ds = new DriverManagerDataSource();
         ds.setDriverClassName("com.mysql.cj.jdbc.Driver");
-        ds.setUrl("jdbc:mysql://localhost:3306/productdb" +
+        ds.setUrl("jdbc:mysql://mysql:3306/productdb" +
                   "?useSSL=false" +
                   "&allowPublicKeyRetrieval=true" +
                   "&serverTimezone=Asia/Seoul" +

src/main/java/kr/ac/hansung/cse/controller/CategoryController.java

@@ -0,0 +1,68 @@
+package kr.ac.hansung.cse.controller;
+
+import kr.ac.hansung.cse.exception.DuplicateCategoryException;
+import kr.ac.hansung.cse.model.CategoryForm;
+import kr.ac.hansung.cse.service.CategoryService;
+import jakarta.validation.Valid;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.mvc.support.RedirectAttributes;
+
+@Controller
+@RequestMapping("/categories")
+public class CategoryController {
+
+    private final CategoryService categoryService;
+
+    public CategoryController(CategoryService categoryService) {
+        this.categoryService = categoryService;
+    }
+
+    // GET /categories → 목록 조회
+    @GetMapping
+    public String listCategories(Model model) {
+        model.addAttribute("categories", categoryService.getAllCategories());
+        return "categoryList";
+    }
+
+    // GET /categories/create → 등록 폼
+    @GetMapping("/create")
+    public String showCreateForm(Model model) {
+        model.addAttribute("categoryForm", new CategoryForm());
+        return "categoryForm";
+    }
+
+    // POST /categories/create → 등록 처리
+    @PostMapping("/create")
+    public String createCategory(
+            @Valid @ModelAttribute CategoryForm categoryForm,
+            BindingResult bindingResult,
+            RedirectAttributes redirectAttributes) {
+
+        if (bindingResult.hasErrors()) return "categoryForm";
+
+        try {
+            categoryService.createCategory(categoryForm.getName());
+            redirectAttributes.addFlashAttribute("successMessage", "카테고리가 등록되었습니다.");
+        } catch (DuplicateCategoryException e) {
+            bindingResult.rejectValue("name", "duplicate", e.getMessage());
+            return "categoryForm";
+        }
+        return "redirect:/categories";
+    }
+
+    // POST /categories/{id}/delete → 삭제
+    @PostMapping("/{id}/delete")
+    public String deleteCategory(@PathVariable Long id,
+                                 RedirectAttributes redirectAttributes) {
+        try {
+            categoryService.deleteCategory(id);
+            redirectAttributes.addFlashAttribute("successMessage", "삭제되었습니다.");
+        } catch (IllegalStateException e) {
+            redirectAttributes.addFlashAttribute("errorMessage", e.getMessage());
+        }
+        return "redirect:/categories";
+    }
+}

src/main/java/kr/ac/hansung/cse/controller/ProductController.java

@@ -4,6 +4,7 @@
 import kr.ac.hansung.cse.exception.ProductNotFoundException;
 import kr.ac.hansung.cse.model.Product;
 import kr.ac.hansung.cse.model.ProductForm;
+import kr.ac.hansung.cse.service.CategoryService;
 import kr.ac.hansung.cse.service.ProductService;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
@@ -37,9 +38,11 @@
 public class ProductController {
 
     private final ProductService productService;
+    private final CategoryService categoryService;
 
-    public ProductController(ProductService productService) {
+    public ProductController(ProductService productService, CategoryService categoryService) {
         this.productService = productService;
+        this.categoryService = categoryService;
     }
 
 
@@ -48,9 +51,24 @@ public ProductController(ProductService productService) {
     // ─────────────────────────────────────────────────────────────────
 
     @GetMapping
-    public String listProducts(Model model) {
-        List<Product> products = productService.getAllProducts();
+    public String listProducts(
+            @RequestParam(required = false) String keyword,
+            @RequestParam(required = false) Long categoryId,
+            Model model) {
+
+        List<Product> products;
+        if (keyword != null && !keyword.isBlank()) {
+            products = productService.searchByName(keyword);
+        } else if (categoryId != null) {
+            products = productService.searchByCategory(categoryId);
+        } else {
+            products = productService.getAllProducts();
+        }
+
         model.addAttribute("products", products);
+        model.addAttribute("categories", categoryService.getAllCategories());
+        model.addAttribute("keyword", keyword);
+        model.addAttribute("categoryId", categoryId);
         return "productList";
     }
 

src/main/java/kr/ac/hansung/cse/exception/DuplicateCategoryException.java

@@ -0,0 +1,7 @@
+package kr.ac.hansung.cse.exception;
+
+public class DuplicateCategoryException extends RuntimeException {
+    public DuplicateCategoryException(String name) {
+        super("이미 존재하는 카테고리입니다: " + name);
+    }
+}

src/main/java/kr/ac/hansung/cse/model/CategoryForm.java

@@ -0,0 +1,13 @@
+package kr.ac.hansung.cse.model;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter @Setter
+public class CategoryForm {
+    @NotBlank(message = "카테고리 이름을 입력하세요")
+    @Size(max = 50, message = "50자 이내로 입력하세요")
+    private String name;
+}

src/main/java/kr/ac/hansung/cse/repository/CategoryRepository.java

@@ -37,7 +37,7 @@ public Optional<Category> findByName(String name) {
         return result.isEmpty() ? Optional.empty() : Optional.of(result.get(0));
     }
 
-    // JOIN FETCH: N+1 문제 방지 (Category + Products 한 번에 로드)
+        // JOIN FETCH: N+1 문제 방지 (Category + Products 한 번에 로드)
     public Optional<Category> findByIdWithProducts(Long id) {
         List<Category> result = em.createQuery(
                         "SELECT DISTINCT c FROM Category c JOIN FETCH c.products WHERE c.id = :id",
@@ -46,5 +46,20 @@ public Optional<Category> findByIdWithProducts(Long id) {
                 .getResultList();
         return result.isEmpty() ? Optional.empty() : Optional.of(result.get(0));
     }
+
+    // 해당 카테고리에 연결된 상품 수 세기
+    public long countProductsByCategoryId(Long categoryId) {
+        return em.createQuery(
+                        "SELECT COUNT(p) FROM Product p WHERE p.category.id = :id", Long.class)
+                .setParameter("id", categoryId)
+                .getSingleResult();
+    }
+
+    // 카테고리 삭제
+    public void delete(Long id) {
+        Category c = em.find(Category.class, id);
+        if (c != null) em.remove(c);
+    }
+
 }
 

src/main/java/kr/ac/hansung/cse/repository/ProductRepository.java

@@ -131,4 +131,21 @@ public void delete(Long id) {
             entityManager.remove(product);
         }
     }
+
+    // 상품 키워드 검색
+    public List<Product> findByNameContaining(String keyword) {
+        return entityManager.createQuery(
+                        "SELECT p FROM Product p LEFT JOIN FETCH p.category WHERE p.name LIKE :keyword", Product.class)
+                .setParameter("keyword", "%" + keyword + "%")
+                .getResultList();
+    }
+
+    // 카테고리 ID로 필터
+    public List<Product> findByCategoryId(Long categoryId) {
+        return entityManager.createQuery(
+                        "SELECT p FROM Product p LEFT JOIN FETCH p.category WHERE p.category.id = :cid", Product.class)
+                .setParameter("cid", categoryId)
+                .getResultList();
+    }
+
 }

src/main/java/kr/ac/hansung/cse/service/CategoryService.java

@@ -0,0 +1,41 @@
+package kr.ac.hansung.cse.service;
+
+import kr.ac.hansung.cse.exception.DuplicateCategoryException;
+import kr.ac.hansung.cse.model.Category;
+import kr.ac.hansung.cse.repository.CategoryRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import java.util.List;
+
+// 카테고리 비즈니스 로직 : 중복 방지, 삭제 시 연결 상품 예외 처리
+
+@Service
+@Transactional(readOnly = true)
+public class CategoryService {
+
+    private final CategoryRepository categoryRepository;
+
+    public CategoryService(CategoryRepository categoryRepository) {
+        this.categoryRepository = categoryRepository;
+    }
+
+    public List<Category> getAllCategories() {
+        return categoryRepository.findAll();
+    }
+
+    @Transactional  // 쓰기 허용
+    public Category createCategory(String name) {
+        categoryRepository.findByName(name)
+                .ifPresent(c -> { throw new DuplicateCategoryException(name); });
+        return categoryRepository.save(new Category(name));
+    }
+
+    @Transactional
+    public void deleteCategory(Long id) {
+        long count = categoryRepository.countProductsByCategoryId(id);
+        if (count > 0) {
+            throw new IllegalStateException("상품 " + count + "개가 연결되어 있어 삭제할 수 없습니다.");
+        }
+        categoryRepository.delete(id);
+    }
+}

src/main/java/kr/ac/hansung/cse/service/ProductService.java

@@ -79,6 +79,16 @@ public List<Product> getAllProducts() {
         return productRepository.findAll();
     }
 
+
+    public List<Product> searchByName(String keyword) {
+        return productRepository.findByNameContaining(keyword);
+    }
+
+
+    public List<Product> searchByCategory(Long categoryId) {
+        return productRepository.findByCategoryId(categoryId);
+    }
+
     /**
      * ID로 상품 조회
      * Optional을 그대로 반환하여 Controller가 null 처리를 명시적으로 하도록 강제합니다.

src/main/webapp/WEB-INF/views/categoryForm.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head><title>카테고리 등록</title></head>
+<body>
+<h1>카테고리 등록</h1>
+
+<form th:action="@{/categories/create}" th:object="${categoryForm}" method="post">
+    <label>카테고리 이름:</label>
+    <input type="text" th:field="*{name}" placeholder="카테고리 이름"/>
+    <span th:errors="*{name}" style="color:red"></span>
+    <br/>
+    <button type="submit">등록</button>
+</form>
+
+<a href="/categories">← 목록으로</a>
+
+<footer style="margin-top:30px; border-top:1px solid #ccc; padding:10px; font-size:12px;">
+    <p th:text="${'실습 수행 일시: ' + #temporals.format(#temporals.createNow(), 'yyyy년 MM월 dd일 HH:mm:ss') + ' | 학번: 2271520 | 성명: 노영민'}"></p>
+</footer>
+</body>
+</html>

src/main/webapp/WEB-INF/views/categoryList.html

@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head><title>카테고리 목록</title></head>
+<body>
+<h1>카테고리 목록</h1>
+
+<!-- 성공/오류 메시지 -->
+<p th:if="${successMessage}" th:text="${successMessage}" style="color:green"></p>
+<p th:if="${errorMessage}" th:text="${errorMessage}" style="color:red"></p>
+
+<a href="/categories/create">+ 카테고리 등록</a>
+
+<table border="1">
+    <tr><th>ID</th><th>이름</th><th>삭제</th></tr>
+    <tr th:each="cat : ${categories}">
+        <td th:text="${cat.id}"></td>
+        <td th:text="${cat.name}"></td>
+        <td>
+            <form th:action="@{/categories/{id}/delete(id=${cat.id})}" method="post">
+                <button type="submit">삭제</button>
+            </form>
+        </td>
+    </tr>
+</table>
+
+<footer style="margin-top:30px; border-top:1px solid #ccc; padding:10px; font-size:12px;">
+    <p th:text="${'실습 수행 일시: ' + #temporals.format(#temporals.createNow(), 'yyyy년 MM월 dd일 HH:mm:ss') + ' | 학번: 2271520 | 성명: 노영민'}"></p>
+</footer>
+</body>
+</html>