alternatywne produkty - by_price

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

 package sklep.controller;
 
+import java.math.BigDecimal;
 import java.util.List;
 
 import javax.persistence.EntityManager;
@@ -11,6 +12,7 @@ import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 
 import sklep.model.Product;
 
@@ -35,4 +37,17 @@ public class AlternatywneProdukty2 {
 		return "product";
 	}
 	
+	@GetMapping("/by_price")
+	public String byPrice(Model model,
+			@RequestParam(defaultValue = "0") BigDecimal min,
+			@RequestParam(defaultValue = "999999999") BigDecimal max) {
+		String ql = "SELECT p FROM Product p WHERE p.price BETWEEN :min AND :max ORDER BY p.productId";
+		TypedQuery<Product> query = em.createQuery(ql, Product.class);
+		query.setParameter("min", min);
+		query.setParameter("max", max);
+		List<Product> products = query.getResultList();
+		model.addAttribute("products", products);
+		return "products";
+	}
+	
 }

PC30-SklepSpring/src/main/webapp/WEB-INF/templates/index.jsp

@@ -45,7 +45,7 @@
 <li><a href="/alt1/products">Dostęp JDBC</a> (wstrzykiwanie DataSource)</li>
 <li><a href="/alt2/products">Dostęp Hibernate/JPA</a> (wstrzykiwanie EntityManager)</li>
 <li><a href="/alt2/products/1">jeden produkt</a></li>
-<li><a href="/alt2/products/by_price?min=1000&max=2900">by price</a></li>
+<li><a href="/alt2/by_price?min=1000&max=2900">by price</a></li>
 </ul>
 
 </body>