add hibernate support, and example

src/main/java/io/github/lumijiez/example/Main.java

@@ -3,10 +3,14 @@ package io.github.lumijiez.example;
 import io.github.lumijiez.core.config.ServerConfig;
 import io.github.lumijiez.core.http.HttpServer;
 import io.github.lumijiez.core.http.HttpStatus;
+import io.github.lumijiez.example.daos.ProductDao;
+import io.github.lumijiez.example.models.Product;
 import io.github.lumijiez.logging.Logger;
 
 public class Main {
     public static void main(String[] args) {
+        ProductDao productDao = new ProductDao();
+
         ServerConfig config = new ServerConfig.Builder()
                 .port(8080)
                 .keepAliveTimeout(30000)
@@ -25,6 +29,11 @@ public class Main {
             res.sendResponse(HttpStatus.OK, "All good, lil bro");
         });
 
+        server.GET("/products", (req, res) -> {
+            Product product = productDao.getProductById(5);
+            res.sendResponse(HttpStatus.OK, product.toString());
+        });
+
         server.start();
     }
 }

src/main/java/io/github/lumijiez/example/daos/ProductDao.java

@@ -0,0 +1,78 @@
+package io.github.lumijiez.example.daos;
+
+import io.github.lumijiez.example.models.Product;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import org.hibernate.cfg.Configuration;
+
+import java.util.List;
+
+public class ProductDao {
+
+    public void saveProduct(Product product) {
+        Transaction transaction = null;
+        try (Session session = new Configuration().configure().buildSessionFactory().openSession()) {
+            transaction = session.beginTransaction();
+            session.save(product);
+            transaction.commit();
+            System.out.println("Product saved successfully!");
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            e.printStackTrace();
+        }
+    }
+
+    public Product getProductById(int id) {
+        try (Session session = new Configuration().configure().buildSessionFactory().openSession()) {
+            return session.get(Product.class, id);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public List<Product> getAllProducts() {
+        try (Session session = new Configuration().configure().buildSessionFactory().openSession()) {
+            return session.createQuery("from Product").list();
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public void updateProduct(Product product) {
+        Transaction transaction = null;
+        try (Session session = new Configuration().configure().buildSessionFactory().openSession()) {
+            transaction = session.beginTransaction();
+            session.update(product);
+            transaction.commit();
+            System.out.println("Product updated successfully!");
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            e.printStackTrace();
+        }
+    }
+
+    public void deleteProduct(int id) {
+        Transaction transaction = null;
+        try (Session session = new Configuration().configure().buildSessionFactory().openSession()) {
+            transaction = session.beginTransaction();
+            Product product = session.get(Product.class, id);
+            if (product != null) {
+                session.delete(product);
+                System.out.println("Product deleted successfully!");
+            }
+            transaction.commit();
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/io/github/lumijiez/example/models/Product.java

@@ -0,0 +1,70 @@
+package io.github.lumijiez.example.models;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "products")
+public class Product {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+
+    @Column(name = "product_code")
+    private String productCode;
+
+    @Column(name = "name")
+    private String name;
+
+    @Column(name = "category")
+    private String category;
+
+    @Column(name = "price")
+    private double price;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getProductCode() {
+        return productCode;
+    }
+
+    public void setProductCode(String productCode) {
+        this.productCode = productCode;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "Product [id=" + id + ", productCode=" + productCode + ", name=" + name +
+                ", category=" + category + ", price=" + price + "]";
+    }
+}