ProductController jako zwykły @Controller

PC37-RestSpring/src/main/java/sklep/rest/ProductController.java

+package sklep.rest;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.server.ResponseStatusException;
+
+import sklep.model.Product;
+import sklep.repository.ProductRepository;
+
+@Controller
+public class ProductController {
+	@Autowired
+	private ProductRepository productRepository;
+	
+	@GetMapping("/products")
+	@ResponseBody
+	public List<Product> readAll() {
+		return productRepository.findAll();
+	}
+
+	@GetMapping("/products/{id}")
+	@ResponseBody
+	public Product readOne(@PathVariable("id") int productId) {
+		Optional<Product> product = productRepository.findById(productId);
+		if(product.isPresent()) {
+			return product.get();
+		} else {
+			throw new ResponseStatusException(HttpStatus.NOT_FOUND); // 404
+		}
+	}
+
+}