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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;
}
}
src/main/java/dev/database/DatabaseConnection.java
+23 -7
View File
@@ -1,27 +1,43 @@
package dev.database;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DatabaseConnection {
private static final String URL = "jdbc:postgresql://localhost:5432/restaurant_db"; // DB Server
private static final String USER = "postgres"; // Your Username
private static final String URL =
"jdbc:postgresql://localhost:5432/restaurant_db";
private static final String PASSWORD = "password"; // Your Password
private DatabaseConnection() {
private static final String USER =
"postgres";
private static final String PASSWORD =
"neda3113";
private DatabaseConnection(){
}
public static Connection getConnection()
throws SQLException {
// TODO:
// Return a valid PostgreSQL connection
return null;
return DriverManager.getConnection(
URL,
USER,
PASSWORD
);
}
}
src/main/java/dev/model/MenuItem.java
+72
View File
@@ -1,7 +1,9 @@
package dev.model;
public class MenuItem {
private int id;
private String name;
@@ -12,4 +14,74 @@ public class MenuItem {
private String category;
public MenuItem(){
}
public MenuItem(int id,String name,String description,
double price,String category){
this.id=id;
this.name=name;
this.description=description;
this.price=price;
this.category=category;
}
public int getId(){
return id;
}
public void setId(int id){
this.id=id;
}
public String getName(){
return name;
}
public void setName(String name){
this.name=name;
}
public String getDescription(){
return description;
}
public void setDescription(String description){
this.description=description;
}
public double getPrice(){
return price;
}
public void setPrice(double price){
this.price=price;
}
public String getCategory(){
return category;
}
public void setCategory(String category){
this.category=category;
}
}
src/main/java/dev/model/Order.java
+60
View File
@@ -1,9 +1,12 @@
package dev.model;
import java.time.LocalDateTime;
public class Order {
private int id;
private int userId;
@@ -12,4 +15,61 @@ public class Order {
private double totalPrice;
public Order(){
}
public Order(int userId,double totalPrice){
this.userId=userId;
this.totalPrice=totalPrice;
}
public int getId(){
return id;
}
public void setId(int id){
this.id=id;
}
public int getUserId(){
return userId;
}
public void setUserId(int userId){
this.userId=userId;
}
public LocalDateTime getCreatedAt(){
return createdAt;
}
public void setCreatedAt(LocalDateTime createdAt){
this.createdAt=createdAt;
}
public double getTotalPrice(){
return totalPrice;
}
public void setTotalPrice(double totalPrice){
this.totalPrice=totalPrice;
}
}
src/main/java/dev/model/OrderDetail.java
+73
View File
@@ -1,7 +1,9 @@
package dev.model;
public class OrderDetail {
private int id;
private int orderId;
@@ -12,4 +14,75 @@ public class OrderDetail {
private double price;
public OrderDetail(){
}
public OrderDetail(int orderId,
int menuItemId,
int quantity,
double price){
this.orderId=orderId;
this.menuItemId=menuItemId;
this.quantity=quantity;
this.price=price;
}
public int getId(){
return id;
}
public void setId(int id){
this.id=id;
}
public int getOrderId(){
return orderId;
}
public void setOrderId(int orderId){
this.orderId=orderId;
}
public int getMenuItemId(){
return menuItemId;
}
public void setMenuItemId(int menuItemId){
this.menuItemId=menuItemId;
}
public int getQuantity(){
return quantity;
}
public void setQuantity(int quantity){
this.quantity=quantity;
}
public double getPrice(){
return price;
}
public void setPrice(double price){
this.price=price;
}
}
src/main/java/dev/model/User.java
+59 -3
View File
@@ -3,11 +3,67 @@ package dev.model;
public class User {
private int id;
private String username;
private String password;
private String email;
public User() {
}
public User(String username, String password, String email) {
this.username = username;
this.password = password;
this.email = email;
}
public User(int id, String username, String password, String email) {
this.id = id;
this.username = username;
this.password = password;
this.email = email;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
src/main/java/dev/service/AuthService.java
+120 -7
View File
@@ -1,23 +1,136 @@
package dev.service;
import dev.dao.UserDao;
import dev.model.User;
import java.security.MessageDigest;
public class AuthService {
public boolean register(String username, String password, String email) {
// TODO:
// Validate and register user
private final UserDao userDao =
new UserDao();
return false;
public boolean register(String username,
String password,
String email){
User existingUser = userDao.findByUsername(username);
if (existingUser != null) {
return false;
}
String hashedPassword = hashPassword(password);
User user = new User(username, hashedPassword, email);
return userDao.save(user);
}
public User login(String username, String password) {
// TODO:
// Authenticate user
public User login(String username,
String password){
User user =
userDao.findByUsername(username);
if(user==null){
return null;
}
String hashed =
hashPassword(password);
if(user.getPassword().equals(hashed)){
return user;
}
return null;
}
private String hashPassword(String password){
try{
MessageDigest md =
MessageDigest.getInstance("SHA-256");
byte[] bytes =
md.digest(
password.getBytes()
);
StringBuilder sb =
new StringBuilder();
for(byte b:bytes){
sb.append(
String.format("%02x",b)
);
}
return sb.toString();
}catch(Exception e){
throw new RuntimeException(e);
}
}
}
src/main/java/dev/service/MenuService.java
+45 -3
View File
@@ -1,12 +1,54 @@
package dev.service;
import dev.dao.MenuItemDao;
import dev.model.MenuItem;
import java.util.List;
public class MenuService {
public void showMenu() {
// TODO:
// Display menu items
private final MenuItemDao dao =
new MenuItemDao();
public void showMenu(){
List<MenuItem> items =
dao.findAll();
System.out.println(
"========== MENU =========="
);
for(MenuItem item:items){
System.out.println(
item.getId()
+" - "
+item.getName()
+" $"
+item.getPrice()
);
}
}
}
src/main/java/dev/service/OrderService.java
+283 -9
View File
@@ -1,26 +1,300 @@
package dev.service;
import dev.dao.MenuItemDao;
import dev.dao.OrderDao;
import dev.dao.OrderDetailDao;
import dev.model.MenuItem;
import dev.model.Order;
import dev.model.OrderDetail;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class OrderService {
public void placeOrder(int userId) {
// TODO:
// Create order
private final MenuItemDao menuDao =
new MenuItemDao();
private final OrderDao orderDao =
new OrderDao();
private final OrderDetailDao detailDao =
new OrderDetailDao();
public int placeOrder(int userId){
Scanner scanner =
new Scanner(System.in);
List<OrderDetail> cart =
new ArrayList<>();
double total = 0;
while(true){
System.out.println(
"Enter menu item id (0 finish): "
);
int itemId =
scanner.nextInt();
if(itemId == 0){
break;
}
MenuItem item =
menuDao.findById(itemId);
if(item == null){
System.out.println(
"Item not found!"
);
continue;
}
System.out.println(
"Enter quantity:"
);
int quantity =
scanner.nextInt();
OrderDetail detail =
new OrderDetail(
0,
item.getId(),
quantity,
item.getPrice()
);
cart.add(detail);
total +=
item.getPrice()
*
quantity;
System.out.println(
"Added to cart."
);
}
if(cart.isEmpty()){
System.out.println(
"Cart is empty"
);
return -1;
}
// Save Order first
Order order =
new Order(
userId,
total
);
int orderId =
orderDao.save(order);
for(OrderDetail detail:cart){
detail.setOrderId(orderId);
detailDao.save(detail);
}
System.out.println(
"Order created successfully!"
);
printReceipt(orderId);
return orderId;
}
public void printReceipt(int orderId) {
// TODO:
// Print order receipt
public void printReceipt(int orderId){
System.out.println(
"\n========== RECEIPT =========="
);
List<OrderDetail> details =
detailDao.findByOrderId(orderId);
double total = 0;
for(OrderDetail d:details){
MenuItem item =
menuDao.findById(
d.getMenuItemId()
);
double subtotal =
d.getQuantity()
*
d.getPrice();
total += subtotal;
System.out.println(
item.getName()
+" | Qty: "
+d.getQuantity()
+" | Unit: $"
+d.getPrice()
+" | Total: $"
+subtotal
);
}
System.out.println(
"----------------------------"
);
System.out.println(
"Grand Total: $"
+total
);
System.out.println(
"============================"
);
}
public void showOrderHistory(int userId) {
// TODO:
// Display user's order history
public void showOrderHistory(int userId){
System.out.println(
"\n======= ORDER HISTORY ======="
);
for(Order order:
orderDao.findByUserId(userId)){
System.out.println(
"Order ID: "
+order.getId()
+
" Total: $"+
order.getTotalPrice()
);
}
}
}
src/main/java/dev/ui/ConsoleMenu.java
+270 -12
View File
@@ -1,44 +1,302 @@
package dev.ui;
import dev.model.User;
import dev.service.AuthService;
import dev.service.MenuService;
import dev.service.OrderService;
import java.util.Scanner;
public class ConsoleMenu {
private final Scanner scanner =
new Scanner(System.in);
public void start() {
while (true) {
System.out.println();
System.out.println("===== JAVA PIZZERIA =====");
System.out.println("1. Login");
System.out.println("2. Register");
System.out.println("3. Exit");
private final AuthService authService =
new AuthService();
int choice = scanner.nextInt();
switch (choice) {
private final MenuService menuService =
new MenuService();
private final OrderService orderService =
new OrderService();
private User currentUser;
public void start(){
while(true){
System.out.println(
"""
=======================================
🍕 WELCOME TO JAVA PIZZERIA 🍕
=======================================
1. Login
2. Register New Account
3. Exit
Choose an option:
"""
);
int choice =
scanner.nextInt();
scanner.nextLine();
switch(choice){
case 1:
// TODO
login();
break;
case 2:
// TODO
register();
break;
case 3:
System.out.println(
"Goodbye!"
);
return;
default:
System.out.println("Invalid choice");
System.out.println(
"Invalid option"
);
}
}
}
private void register() {
System.out.println("Username:");
String username = scanner.nextLine();
System.out.println("Password:");
String password = scanner.nextLine();
System.out.println("Email:");
String email = scanner.nextLine();
boolean success = authService.register(username, password, email);
if (success) {
System.out.println("Registration successful!");
} else {
System.out.println("Username already exists!");
}
}
private void login(){
System.out.println(
"Username:"
);
String username =
scanner.nextLine();
System.out.println(
"Password:"
);
String password =
scanner.nextLine();
currentUser =
authService.login(
username,
password
);
if(currentUser != null){
System.out.println(
"Login successful"
);
mainMenu();
}
else{
System.out.println(
"Wrong username or password"
);
}
}
private void mainMenu(){
while(currentUser != null){
System.out.println(
"""
=======================================
🍽️ MAIN MENU 🍽️
=======================================
1. View Menu
2. Place Order
3. Order History
4. Logout
=========================
"""
);
int choice =
scanner.nextInt();
switch(choice){
case 1:
menuService.showMenu();
break;
case 2:
orderService.placeOrder(
currentUser.getId()
);
break;
case 3:
orderService.showOrderHistory(
currentUser.getId()
);
break;
case 4:
currentUser=null;
System.out.println(
"Logged out"
);
break;
default:
System.out.println(
"Invalid option"
);
}
}
}
}