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database

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neda
2026-07-19 05:38:14 +03:30
parent 00f990c653
commit 3edfdf75a9
20 changed files with 1620 additions and 187 deletions
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src/main/java/dev/dao/MenuItemDao.java
+115 -7
View File
@@ -1,25 +1,133 @@
package dev.dao;
import dev.database.DatabaseConnection;
import dev.model.MenuItem;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class MenuItemDao {
public List<MenuItem> findAll() {
// TODO:
// Retrieve all menu items
return null;
public List<MenuItem> findAll(){
List<MenuItem> list=new ArrayList<>();
String sql="SELECT * FROM menu_items";
try(Connection con =
DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ResultSet rs=ps.executeQuery();
while(rs.next()){
list.add(new MenuItem(
rs.getInt("id"),
rs.getString("name"),
rs.getString("description"),
rs.getDouble("price"),
rs.getString("category")
));
}
}catch(SQLException e){
e.printStackTrace();
}
return list;
}
public MenuItem findById(int id) {
// TODO:
// Find menu item by id
public MenuItem findById(int id){
String sql =
"SELECT * FROM menu_items WHERE id=?";
try(Connection con =
DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ps.setInt(1,id);
ResultSet rs=ps.executeQuery();
if(rs.next()){
return new MenuItem(
rs.getInt("id"),
rs.getString("name"),
rs.getString("description"),
rs.getDouble("price"),
rs.getString("category")
);
}
}catch(SQLException e){
e.printStackTrace();
}
return null;
}
}
src/main/java/dev/dao/OrderDao.java
+111 -6
View File
@@ -1,25 +1,130 @@
package dev.dao;
import dev.database.DatabaseConnection;
import dev.model.Order;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class OrderDao {
public int save(Order order) {
// TODO:
// Insert order and return generated id
String sql =
"INSERT INTO orders(user_id,total_price) VALUES(?,?)";
try(Connection con = DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS)){
ps.setInt(1, order.getUserId());
ps.setDouble(2, order.getTotalPrice());
ps.executeUpdate();
ResultSet rs = ps.getGeneratedKeys();
if(rs.next()){
return rs.getInt(1);
}
}catch(SQLException e){
e.printStackTrace();
}
return -1;
}
public List<Order> findByUserId(int userId) {
// TODO:
// Retrieve all orders of a user
return null;
public List<Order> findByUserId(int userId){
List<Order> orders = new ArrayList<>();
String sql =
"SELECT * FROM orders WHERE user_id=?";
try(Connection con = DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ps.setInt(1,userId);
ResultSet rs = ps.executeQuery();
while(rs.next()){
Order order = new Order();
order.setId(rs.getInt("id"));
order.setUserId(rs.getInt("user_id"));
order.setTotalPrice(
rs.getDouble("total_price")
);
Timestamp timestamp =
rs.getTimestamp("created_at");
if(timestamp != null){
order.setCreatedAt(
timestamp.toLocalDateTime()
);
}
orders.add(order);
}
}catch(SQLException e){
e.printStackTrace();
}
return orders;
}
}
src/main/java/dev/dao/OrderDetailDao.java
+127 -7
View File
@@ -1,24 +1,144 @@
package dev.dao;
import dev.database.DatabaseConnection;
import dev.model.OrderDetail;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class OrderDetailDao {
public void save(OrderDetail detail) {
// TODO:
// Insert order detail
public void save(OrderDetail detail){
String sql =
"""
INSERT INTO order_details
(order_id,menu_item_id,quantity,price)
VALUES(?,?,?,?)
""";
try(Connection con =
DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ps.setInt(1,detail.getOrderId());
ps.setInt(2,detail.getMenuItemId());
ps.setInt(3,detail.getQuantity());
ps.setDouble(4,detail.getPrice());
ps.executeUpdate();
}catch(SQLException e){
e.printStackTrace();
}
}
public List<OrderDetail> findByOrderId(int orderId) {
// TODO:
// Retrieve order details
return null;
public List<OrderDetail> findByOrderId(int orderId){
List<OrderDetail> list =
new ArrayList<>();
String sql =
"SELECT * FROM order_details WHERE order_id=?";
try(Connection con =
DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ps.setInt(1,orderId);
ResultSet rs =
ps.executeQuery();
while(rs.next()){
OrderDetail detail =
new OrderDetail();
detail.setId(
rs.getInt("id")
);
detail.setOrderId(
rs.getInt("order_id")
);
detail.setMenuItemId(
rs.getInt("menu_item_id")
);
detail.setQuantity(
rs.getInt("quantity")
);
detail.setPrice(
rs.getDouble("price")
);
list.add(detail);
}
}catch(SQLException e){
e.printStackTrace();
}
return list;
}
}
src/main/java/dev/dao/UserDao.java
+92 -6
View File
@@ -1,23 +1,109 @@
package dev.dao;
import dev.database.DatabaseConnection;
import dev.model.User;
import java.sql.*;
public class UserDao {
public boolean save(User user) {
// TODO:
// Insert user into database
public boolean save(User user){
String sql =
"INSERT INTO users(username,password,email) VALUES(?,?,?)";
try(Connection con =
DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ps.setString(1,user.getUsername());
ps.setString(2,user.getPassword());
ps.setString(3,user.getEmail());
ps.executeUpdate();
return true;
}catch(SQLException e){
e.printStackTrace();
}
return false;
}
public User findByUsername(String username) {
// TODO:
// Find a user by username
public User findByUsername(String username){
String sql =
"SELECT * FROM users WHERE username=?";
try(Connection con =
DatabaseConnection.getConnection();
PreparedStatement ps =
con.prepareStatement(sql)){
ps.setString(1,username);
ResultSet rs=ps.executeQuery();
if(rs.next()){
return new User(
rs.getInt("id"),
rs.getString("username"),
rs.getString("password"),
rs.getString("email")
);
}
}catch(SQLException e){
e.printStackTrace();
}
return null;
}
}