경북대 BE_권다운_1주차 과제(1단계~3단계)

src/main/java/gift/Application.java

@@ -3,9 +3,12 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+
 @SpringBootApplication
 public class Application {
+
     public static void main(String[] args) {
         SpringApplication.run(Application.class, args);
     }
+
 }

src/main/java/gift/controller/ProductController.java

@@ -0,0 +1,87 @@
+package gift.controller;
+
+import gift.model.Product;
+import gift.model.ProductDao;
+
+import java.util.List;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
+
+@Controller
+public class ProductController {
+
+    private final ProductDao productDao;
+
+    public ProductController(ProductDao productDao) {
+        this.productDao = productDao;
+    }
+
+    @GetMapping("/admin")
+    public String admin() {
+        return "adminPage";
+    }
+
+    @GetMapping("/products")
+    public ResponseEntity<List<ProductResponse>> getProducts() {
+        var products = productDao.findAll();
+        var response = products.stream()
+            .map(ProductResponse::from)
+            .toList();
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/products/{id}")
+    public ResponseEntity<ProductResponse> getProduct(@PathVariable("id") Long id) {
+        var product = productDao.findById(id)
+            .orElseThrow(() -> new IllegalArgumentException("해당 상품이 존재하지 않습니다."));
+        var response = ProductResponse.from(product);
+        return ResponseEntity.ok(response);
+    }
+
+    @PostMapping("/products")
+    public ResponseEntity<String> createProduct(@RequestBody ProductRequest request) {
+        productDao.save(request.toEntity());
+        return ResponseEntity.ok().body("Product created successfully.");
+    }
+
+
+    @PutMapping("/products/{id}")
+    public ResponseEntity<String> updateProduct(@PathVariable("id") Long id,
+        @RequestBody ProductRequest request) {
+        productDao.findById(id)
+            .orElseThrow(() -> new IllegalArgumentException("해당 상품이 존재하지 않습니다."));
+        productDao.update(request.toEntity(id));
+        return ResponseEntity.ok().body("Product updated successfully.");
+    }
+
+    @DeleteMapping("/products/{id}")
+    public ResponseEntity<Void> deleteProduct(@PathVariable("id") Long id) {
+        productDao.findById(id)
+            .orElseThrow(() -> new IllegalArgumentException("해당 상품이 존재하지 않습니다."));
+        productDao.deleteById(id);
+        return ResponseEntity.noContent().build();
+    }
+
+    @GetMapping("/products/paging")
+    public ResponseEntity<List<ProductResponse>> getProductsPaging(@RequestParam("page") int page,
+        @RequestParam("size") int size) {
+        var products = productDao.findPaging(page, size);
+        var response = products.stream()
+            .map(ProductResponse::from)
+            .toList();
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/products/count")
+    public ResponseEntity<Long> getProductsCount() {
+        return ResponseEntity.ok(productDao.count());
+    }
+}

src/main/java/gift/controller/ProductRequest.java

@@ -0,0 +1,19 @@
+package gift.controller;
+
+
+import gift.model.Product;
+
+public record ProductRequest(
+    String name,
+    Integer price,
+    String imageUrl
+) {
+
+    public Product toEntity() {
+        return Product.create(null, name(), price(), imageUrl());
+    }
+
+    public Product toEntity(Long id) {
+        return Product.create(id, name(), price(), imageUrl());
+    }
+}

src/main/java/gift/controller/ProductResponse.java

@@ -0,0 +1,16 @@
+package gift.controller;
+
+import gift.model.Product;
+
+public record ProductResponse(
+    Long id,
+    String name,
+    Integer price,
+    String imageUrl
+) {
+
+    public static ProductResponse from(Product product) {
+        return new ProductResponse(product.getId(), product.getName(), product.getPrice(),
+            product.getImageUrl());
+    }
+}

src/main/java/gift/model/Product.java

@@ -0,0 +1,38 @@
+package gift.model;
+
+
+public class Product {
+
+    private Long id;
+    private String name;
+    private Integer price;
+    private String imageUrl;
+
+    public Product(Long id, String name, Integer price, String imageUrl) {
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.imageUrl = imageUrl;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Integer getPrice() {
+        return price;
+    }
+
+    public String getImageUrl() {
+        return imageUrl;
+    }
+
+    public static Product create(Long id, String name, Integer price, String imageUrl) {
+        return new Product(id, name, price, imageUrl);
+    }
+
+}

src/main/java/gift/model/ProductDao.java

@@ -0,0 +1,23 @@
+package gift.model;
+
+import java.util.List;
+import java.util.Optional;
+import org.springframework.stereotype.Component;
+
+@Component
+public interface ProductDao {
+
+    void save(Product product);
+
+    Optional<Product> findById(Long id);
+
+    List<Product> findAll();
+
+    void deleteById(Long id);
+
+    void update(Product product);
+
+    List<Product> findPaging(int page, int size);
+
+    Long count();
+}

src/main/java/gift/model/ProductJdbcTemplateDao.java

@@ -0,0 +1,75 @@
+package gift.model;
+
+import java.util.List;
+import java.util.Optional;
+import javax.sql.DataSource;
+import org.springframework.context.annotation.Primary;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Component;
+
+@Component
+@Primary
+public class ProductJdbcTemplateDao implements ProductDao {
+
+    private static final String SQL_INSERT = "INSERT INTO products(name, price, image_url) VALUES (?, ?, ?)";
+    private static final String SQL_SELECT_BY_ID = "SELECT id, name, price, image_url FROM products WHERE id = ?";
+    private static final String SQL_SELECT_ALL = "SELECT id, name, price, image_url FROM products";
+    private static final String SQL_DELETE_BY_ID = "DELETE FROM products WHERE id = ?";
+    private static final String SQL_UPDATE = "UPDATE products SET name = ?, price = ?, image_url = ? WHERE id = ?";
+    private static final String SQL_SELECT_PAGING = "SELECT id, name, price, image_url FROM products LIMIT ? OFFSET ?";
+    private static final String SQL_COUNT = "SELECT COUNT(*) FROM products";
+
+
+    private final JdbcTemplate jdbcTemplate;
+    private final RowMapper<Product> productRowMapper = new ProductRowMapper();
+
+    public ProductJdbcTemplateDao(DataSource dataSource) {
+        this.jdbcTemplate = new JdbcTemplate(dataSource);
+    }
+
+    @Override
+    public void save(Product product) {
+        jdbcTemplate.update(SQL_INSERT, product.getName(), product.getPrice(),
+            product.getImageUrl());
+    }
+
+    @Override
+    public Optional<Product> findById(Long id) {
+        try {
+            Product product = jdbcTemplate.queryForObject(SQL_SELECT_BY_ID,
+                productRowMapper, id);
+            return Optional.of(product);
+        } catch (Exception e) {
+            return Optional.empty();
+        }
+    }
+
+    @Override
+    public List<Product> findAll() {
+        return jdbcTemplate.query(SQL_SELECT_ALL,
+            productRowMapper);
+    }
+
+    @Override
+    public void deleteById(Long id) {
+        jdbcTemplate.update(SQL_DELETE_BY_ID, id);
+    }
+
+    @Override
+    public void update(Product product) {
+        jdbcTemplate.update(SQL_UPDATE, product.getName(), product.getPrice(),
+            product.getImageUrl(), product.getId());
+    }
+
+    @Override
+    public List<Product> findPaging(int page, int size) {
+        int offset = (page) * size;
+        return jdbcTemplate.query(SQL_SELECT_PAGING, productRowMapper, size, offset);
+    }
+
+    @Override
+    public Long count() {
+        return jdbcTemplate.queryForObject(SQL_COUNT, Long.class);
+    }
+}

src/main/java/gift/model/ProductMapDao.java

@@ -0,0 +1,50 @@
+package gift.model;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ProductMapDao implements ProductDao {
+
+    private final Map<Long, Product> database = new ConcurrentHashMap<>();
+
+    @Override
+    public void save(Product product) {
+        Product newProduct = Product.create(Long.valueOf(database.size() + 1), product.getName(),
+            product.getPrice(), product.getImageUrl());
+        database.put(newProduct.getId(), newProduct);
+    }
+
+    @Override
+    public Optional<Product> findById(Long id) {
+        return Optional.ofNullable(database.get(id));
+    }
+
+    @Override
+    public List<Product> findAll() {
+        return List.copyOf(database.values());
+    }
+
+    @Override
+    public void deleteById(Long id) {
+        database.remove(id);
+    }
+
+    @Override
+    public void update(Product product) {
+        database.replace(product.getId(), product);
+    }
+
+    @Override
+    public List<Product> findPaging(int page, int size) {
+        return null;
+    }
+
+    @Override
+    public Long count() {
+        return Long.valueOf(database.size());
+    }
+}

src/main/java/gift/model/ProductRowMapper.java

@@ -0,0 +1,18 @@
+package gift.model;
+
+import org.springframework.jdbc.core.RowMapper;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class ProductRowMapper implements RowMapper<Product> {
+
+    @Override
+    public Product mapRow(ResultSet resultSet, int rowNum) throws SQLException {
+        return new Product(
+            resultSet.getLong("id"),
+            resultSet.getString("name"),
+            resultSet.getInt("price"),
+            resultSet.getString("image_url")
+        );
+    }
+}

src/main/resources/application.properties

@@ -1 +1,8 @@
 spring.application.name=spring-gift
+# h2-console ??? ??
+spring.h2.console.enabled=true
+# db url
+spring.datasource.url=jdbc:h2:mem:test
+spring.sql.init.schema-locations=classpath:/static/sql/schema.sql
+spring.sql.init.data-locations=classpath:/static/sql/data.sql
+spring.sql.init.mode=always