4회차 - 연습문제 (3)

문제

상품 조회 api 역할 구분하기

controller, service, repository 구분하기

 

풀이

@RestController
@RequestMapping("api/products")
public class ProductController3 {
 
    private final ProductService3 productService;
 
 
    public ProductController3(ProductService3 productService) {
        this.productService = productService;
    }
 
    // 상품 조회
    @GetMapping("/id/{id}")
    public Product3 getProductInfo(@PathVariable("id") String id) {
        return productService.getProductInfo(Integer.valueOf(id));
    }
}

@Service
public class ProductService3 {
 
    private final ProductRepository3 productRepository;
 
    public ProductService3(ProductRepository3 productRepository) {
        this.productRepository = productRepository;
    }
 
    public Product3 getProductInfo(Integer id) {
        Product3 product = productRepository.getProductInfo(id);
        product.setPrice(product.getPrice()/1300);
        return product;
    }
}

@Repository
public class ProductRepository3 {
 
    private final List<Product3> products = List.of(
        new Product3(1000, "키보드", 10000L),
        new Product3(1001, "마우스", 20000L),
        new Product3(1002, "모니터", 30000L)
    );
 
    public Product3 getProductInfo(Integer id) {
        for (Product3 product: products) {
            if (product.getId().equals(id)) {
                return product;
            }
        }
        return null;
    }
}

package com.jscode.spring.day04.Example3;
 
import lombok.Getter;
import lombok.Setter;
 
@Getter
@Setter
public class Product3 {
    private Integer id;
    private final String name;
    private Long price;
 
    public Product3(Integer id, String name, Long price) {
        this.id = id;
        this.name = name;
        this.price = price;
    }
}