Wyszukiwarka w oparciu o EntityManager

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v3.java

 package sklep.alternatywne_dostepy_do_bazy;
 
 import jakarta.persistence.EntityManager;
+import jakarta.persistence.TypedQuery;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
@@ -35,4 +36,13 @@ public class ProductController_v3 {
             return "missing_product";
         }
     }
+
+    @GetMapping("/szukaj")
+    public String szukaj(String name, Model model) {
+        TypedQuery<Product> query = em.createQuery("SELECT p FROM Product p WHERE productName = :nazwa", Product.class);
+        query.setParameter("nazwa", name);
+        List<Product> products = query.getResultList();
+        model.addAttribute("products", products);
+        return "wyszukiwarka";
+    }
 }

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v7.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+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 sklep.model.Product;
+import sklep.repository.ProductRepository;
+
+import java.math.BigDecimal;
+import java.util.List;
+import java.util.Optional;
+
+
+@Controller
+@RequestMapping("/alt7/products")
+public class ProductController_v7 {
+    @Autowired
+    private ProductRepository productRepository;
+
+    @GetMapping
+    public String readAll(Model model) {
+        List<Product> products = productRepository.findAll();
+        model.addAttribute("products", products);
+        return "products";
+    }
+
+    @GetMapping("/{id}")
+    public String readOne(@PathVariable("id") Integer productId, Model model) {
+        Optional<Product> product = productRepository.findById(productId);
+        if(product.isPresent()) {
+            model.addAttribute("product", product.get());
+            return "product";
+        } else {
+            return "missing_product";
+        }
+    }
+
+    @GetMapping("/szukaj")
+    public String szukaj(Model model,
+                                  String name,
+                                  BigDecimal min,
+                                  BigDecimal max) {
+        List<Product> products = List.of();
+        if(name != null && !name.isEmpty() && min == null && max == null) {
+            products = productRepository.findByProductNameContainingIgnoreCase(name);
+        } else if ((name == null || name.isEmpty()) && (min != null || max != null)) {
+            if(min == null) {
+                min = BigDecimal.ZERO;
+            }
+            if(max == null) {
+                max = BigDecimal.valueOf(1000_000_000);
+            }
+            products = productRepository.findByPriceBetween(min, max);
+        } else if (name != null && !name.isEmpty() && (min != null || max != null)) {
+            if(min == null) {
+                min = BigDecimal.ZERO;
+            }
+            if(max == null) {
+                max = BigDecimal.valueOf(1000_000_000);
+            }
+            products = productRepository.findByProductNameContainingIgnoringCaseAndPriceBetween(name, min, max);
+        }
+        model.addAttribute("products", products);
+        return "wyszukiwarka2";
+    }
+
+}