Dodatkowe wersje dostępów do bazy danych

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v1.java

@@ -3,7 +3,9 @@ package sklep.alternatywne_dostepy_do_bazy;
 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.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.ResponseBody;
 
 import javax.sql.DataSource;
@@ -37,4 +39,55 @@ public class ProductController_v1 {
         }
         return sb.toString();
     }
+    
+    @GetMapping("/{id}")
+    @ResponseBody
+    public String jedenProdukt(@PathVariable int id) {
+        StringBuilder sb = new StringBuilder();        
+        final String sql = "SELECT * FROM products WHERE product_id = ?";
+        try(Connection c = dataSource.getConnection();
+            PreparedStatement stmt = c.prepareStatement(sql)) {
+            stmt.setInt(1, id);
+            try(ResultSet rs = stmt.executeQuery()) {
+                if(rs.next()) {
+                    sb.append("Znaleziony produkt:\n")
+                        .append(rs.getString("product_name"))
+                        .append(" za cenę ")
+                        .append(rs.getBigDecimal("price"))
+                        .append('\n');
+                } else {
+                    sb.append("Nie ma produktu o numerze ").append(id);
+                }
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+            sb.append("Błąd: " + e);
+        }
+        return sb.toString();
+    }
+    
+    @GetMapping("/szukaj")
+    @ResponseBody
+    public String wyszukajProdukty(@RequestParam String name) {
+        StringBuilder sb = new StringBuilder();
+        
+        final String sql = "SELECT * FROM products WHERE product_name = ? ORDER BY product_id";
+        try(Connection c = dataSource.getConnection();
+            PreparedStatement stmt = c.prepareStatement(sql)) {
+            stmt.setString(1, name);
+            try(ResultSet rs = stmt.executeQuery()) {
+                while(rs.next()) {
+                    sb.append("* produkt ")
+                        .append(rs.getString("product_name"))
+                        .append(" za cenę ")
+                        .append(rs.getBigDecimal("price"))
+                        .append('\n');
+                }
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+            sb.append("Błąd: " + e);
+        }
+        return sb.toString();
+    }
 }

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v2.java

 package sklep.alternatywne_dostepy_do_bazy;
 
-import jakarta.persistence.EntityManager;
+import java.util.List;
+
 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.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
-import sklep.model.Product;
-
-import java.util.List;
 
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.TypedQuery;
+import sklep.model.Product;
 
 @Controller
 @RequestMapping("/alt2/products")
@@ -22,7 +24,7 @@ public class ProductController_v2 {
     public String readAll() {
         List<Product> products = em.createNamedQuery("Product.findAll", Product.class).getResultList();
         StringBuilder sb = new StringBuilder("Lista produktów:\n");
-        for (Product product : products) {
+        for(Product product : products) {
             sb.append(" * ")
                     .append(product.getProductName())
                     .append(" za cenę ")
@@ -31,4 +33,41 @@ public class ProductController_v2 {
         }
         return sb.toString();
     }
+
+    @GetMapping(path = "/{id}", produces = "text/plain;charset=UTF-8")
+    @ResponseBody
+    public String readOne(@PathVariable("id") Integer productId) {
+        Product product = em.find(Product.class, productId);
+        StringBuilder sb = new StringBuilder();
+        if(product != null) {
+            sb.append("Znaleziony produkt:\n")
+                    .append(product.getProductName())
+                    .append(" za cenę ")
+                    .append(product.getPrice())
+                    .append('\n');
+        } else {
+            sb.append("Nie ma produktu o numerze ").append(productId);
+        }
+        return sb.toString();
+    }
+
+    @GetMapping(path = "/szukaj", produces = "text/plain;charset=UTF-8")
+    @ResponseBody
+    public String szukaj(String name) {
+        TypedQuery<Product> query = em.createQuery("SELECT p FROM Product p WHERE productName = :nazwa", Product.class);
+        query.setParameter("nazwa", name);
+        Product product = query.getSingleResult();
+        StringBuilder sb = new StringBuilder();
+        if(product != null) {
+            sb.append("Znaleziony produkt:\n")
+                    .append(product.getProductName())
+                    .append(" za cenę ")
+                    .append(product.getPrice())
+                    .append('\n');
+        } else {
+            sb.append("Nie ma produktu o nazwie ").append(name);
+        }
+        return sb.toString();
+    }
+
 }

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v4.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import java.util.List;
+import java.util.Optional;
+
+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 org.springframework.web.bind.annotation.RequestParam;
+
+import sklep.model.Product;
+
+@Controller
+@RequestMapping("/alt4/products")
+public class ProductController_v4 {
+	@Autowired
+	private ProductRepository_v4 productRepository;
+	
+	@GetMapping
+	public String wszystkieProdukty(Model model) {
+		List<Product> products = productRepository.findAll();
+		model.addAttribute("products", products);
+		return "products";
+	}
+
+	@GetMapping("/{id}")
+	public String jedenProdukt(@PathVariable int id, Model model) {
+		Optional<Product> product = productRepository.findById(id);
+		if(product.isPresent()) {
+			model.addAttribute("product", product.get());
+			return "product";
+		} else {
+			model.addAttribute("product_id", id);
+			return "missing_product";
+		}
+	}
+	
+	@GetMapping("/szukaj")
+	public String wyszukajProdukty(@RequestParam String name, Model model) {
+		List<Product> products = productRepository.findByProductName(name);
+		model.addAttribute("products", products);
+		return "products";
+	}
+}

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v5.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import java.util.List;
+import java.util.Optional;
+
+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 org.springframework.web.bind.annotation.RequestParam;
+
+import sklep.model.Product;
+
+@Controller
+@RequestMapping("/alt5/products")
+public class ProductController_v5 {
+	@Autowired
+	private ProductRepository_v5 productRepository;
+	
+	@GetMapping
+	public String wszystkieProdukty(Model model) {
+		List<Product> products = productRepository.findAll();
+		model.addAttribute("products", products);
+		return "products";
+	}
+
+	@GetMapping("/{id}")
+	public String jedenProdukt(@PathVariable int id, Model model) {
+		Optional<Product> product = productRepository.findById(id);
+		if(product.isPresent()) {
+			model.addAttribute("product", product.get());
+			return "product";
+		} else {
+			model.addAttribute("product_id", id);
+			return "missing_product";
+		}
+	}
+	
+	@GetMapping("/szukaj")
+	public String wyszukajProdukty(@RequestParam String name, Model model) {
+		List<Product> products = productRepository.findByProductName(name);
+		model.addAttribute("products", products);
+		return "products";
+	}
+}

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductController_v6.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import java.util.List;
+import java.util.Optional;
+
+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;
+
+@Controller
+@RequestMapping("/alt6/products")
+public class ProductController_v6 {
+	@Autowired
+	private ProductRepository_v6 productRepository;
+	
+	@GetMapping
+	public String wszystkieProdukty(Model model) {
+		List<Product> products = productRepository.findAll();
+		model.addAttribute("products", products);
+		return "products";
+	}
+
+	@GetMapping("/{id}")
+	public String jedenProdukt(@PathVariable int id, Model model) {
+		Optional<Product> product = productRepository.findById(id);
+		if(product.isPresent()) {
+			model.addAttribute("product", product.get());
+			return "product";
+		} else {
+			model.addAttribute("product_id", id);
+			return "missing_product";
+		}
+	}
+
+}

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductRepository_v4.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.TypedQuery;
+import sklep.model.Product;
+
+@Repository
+public class ProductRepository_v4 {
+	@Autowired
+	private EntityManager em;
+	
+	public List<Product> findAll() {
+		TypedQuery<Product> query = em.createNamedQuery("Product.findAll", Product.class);
+		return query.getResultList();
+	}
+	
+	public Optional<Product> findById(int productId) {
+		return Optional.ofNullable(em.find(Product.class, productId));
+	}
+	
+	public List<Product> findByProductName(String name) {
+		final String sql = "SELECT p FROM Product p WHERE p.productName = :name";
+		TypedQuery<Product> query = em.createQuery(sql, Product.class);
+		query.setParameter("name", name);
+		return query.getResultList();
+	}
+}

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductRepository_v5.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import java.util.List;
+import java.util.Optional;
+
+import sklep.model.Product;
+
+public interface ProductRepository_v5 {
+
+	List<Product> findAll();
+
+	Optional<Product> findById(int productId);
+
+	List<Product> findByProductName(String name);
+
+}
\ No newline at end of file

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductRepository_v5_Impl.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.TypedQuery;
+import sklep.model.Product;
+
+@Repository
+public class ProductRepository_v5_Impl implements ProductRepository_v5 {
+	@Autowired
+	private EntityManager em;
+	
+	public List<Product> findAll() {
+		TypedQuery<Product> query = em.createNamedQuery("Product.findAll", Product.class);
+		return query.getResultList();
+	}
+	
+	public Optional<Product> findById(int productId) {
+		return Optional.ofNullable(em.find(Product.class, productId));
+	}
+	
+	public List<Product> findByProductName(String name) {
+		final String sql = "SELECT p FROM Product p WHERE p.productName = :name";
+		TypedQuery<Product> query = em.createQuery(sql, Product.class);
+		query.setParameter("name", name);
+		return query.getResultList();
+	}
+}

PC27-SklepSpring/src/main/java/sklep/alternatywne_dostepy_do_bazy/ProductRepository_v6.java

+package sklep.alternatywne_dostepy_do_bazy;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import sklep.model.Product;
+
+// We wcześniejszych wersjach pisało się tu adnotację @Repository.
+// @Repository
+public interface ProductRepository_v6 extends JpaRepository<Product, Integer> {
+
+}