전남대 BE_고준서 1단계 - 상품API

README.md

@@ -1 +1,2 @@
-# spring-gift-product
+# spring-gift-product
+-상품 조회, 수정, 추가, 삭제 구현

build.gradle

@@ -9,7 +9,7 @@ version = '0.0.1-SNAPSHOT'
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(17)
     }
 }
 
@@ -24,6 +24,7 @@ dependencies {
     runtimeOnly 'com.h2database:h2'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+    implementation 'org.springframework.boot:spring-boot-starter-validation'
 }
 
 tasks.named('test') {

src/main/java/gift/Controller/ProductController.java

@@ -0,0 +1,77 @@
+package gift.Controller;
+
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import gift.Model.Product;
+import gift.Validation.ProductValidator;
+import org.springframework.http.*;
+
+@RestController
+@RequestMapping("/api/products")
+public class ProductController {
+
+    private final Map<Long, Product> products = new HashMap<>();
+    private long nextId = 1;
+
+    public ProductController() {
+        products.put(nextId, new Product(
+                nextId++,
+                "아이스 카페 아메리카노 T",
+                4500,
+                "https://st.kakaocdn.net/product/gift/product/20231010111814_9a667f9eccc943648797925498bdd8a3.jpg"
+        ));
+    }
+
+    @GetMapping
+    public List<Product> getAllPRoducts(){
+        return new ArrayList<>(products.values());
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<Product> getProductById(@PathVariable Long id) {
+        Product product = products.get(id);
+        if (product == null) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        return ResponseEntity.ok(product);
+    }
+
+    @PostMapping
+    public ResponseEntity<?> addProduct(@RequestBody Product product) {
+        Map<String, String> errors = ProductValidator.validate(product);
+        if (!errors.isEmpty()) {
+            return ResponseEntity.badRequest().body(errors);
+        }
+
+        product.setId(nextId++);
+        products.put(product.getId(), product);
+        return ResponseEntity.status(HttpStatus.CREATED).body(product);
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteProduct(@PathVariable Long id) {
+        if (!products.containsKey(id)) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        products.remove(id);
+        return ResponseEntity.noContent().build();
+    }
+
+    @PutMapping("/{id}")
+    public ResponseEntity<?> updateProduct(@PathVariable Long id, @RequestBody Product updated) {
+        Product existing = products.get(id);
+        if (existing == null) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+
+        Map<String, String> errors = ProductValidator.validate(updated);
+        if (!errors.isEmpty()) {
+            return ResponseEntity.badRequest().body(errors);
+        }
+
+        existing.setName(updated.getName());
+        existing.setPrice(updated.getPrice());
+        existing.setImgURL(updated.getImgURL());
+        return ResponseEntity.ok(existing);
+    }
+}

src/main/java/gift/Model/Product.java

@@ -0,0 +1,29 @@
+package gift.Model;
+
+public class Product {
+    private Long id;
+    private String name;
+    private int price;
+    private String imgURL;
+
+    public Product() {}
+
+    public Product(Long id, String name, int price, String imgURL) {
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.imgURL = imgURL;
+    }
+
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+
+    public int getPrice() { return price; }
+    public void setPrice(int price) { this.price = price; }
+
+    public String getImgURL() { return imgURL; }
+    public void setImgURL(String imgURL) { this.imgURL = imgURL; }
+}

src/main/java/gift/Validation/ProductValidator.java

@@ -0,0 +1,26 @@
+package gift.Validation;
+
+import gift.Model.Product;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ProductValidator {
+
+    public static Map<String, String> validate(Product product) {
+        Map<String, String> errors = new HashMap<>();
+
+        if (product.getName() == null || product.getName().trim().isEmpty()) {
+            errors.put("name", "상품 이름이 비어있습니다.");
+        }
+
+        if (product.getPrice() < 0) {
+            errors.put("price", "상품 가격은 0 이상이어야 합니다.");
+        }
+
+        if (product.getImgURL() == null || product.getImgURL().trim().isEmpty()) {
+            errors.put("imgURL", "이미지 URL이 비어 있습니다.");
+        }
+
+        return errors;
+    }
+}