odczyt produktów przez EM

PC30-SklepSpring/src/main/java/sklep/controller/AlternatywneProdukty2.java

+package sklep.controller;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import javax.persistence.EntityManager;
+import javax.persistence.TypedQuery;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import sklep.model.Product;
+
+@Controller
+@RequestMapping("/alt2")
+public class AlternatywneProdukty2 {
+	@Autowired
+	private EntityManager em;
+		
+	@GetMapping("/products")
+	@ResponseBody
+	public String products() {
+		
+		TypedQuery<Product> query = em.createNamedQuery("Product.findAll", Product.class);
+		List<Product> products = query.getResultList();
+		
+		return products.stream().map(Product::getProductName).collect(Collectors.joining(", "));
+	}
+	
+}