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Programming Languages/Java

Chapter 29. WindowBuilder

by 더 이프 2023. 1. 17.
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목차

    1. WindowBuilder

    ￭ WindowBuilder란?

    • Swing, SWT와 같은 자바 라이브러리를 기반으로 코드를 직접 작성하지 않고도 GUI를 시각적으로 간단하게 만들 수 있는 도구
    • WindowBuilder를 통해 디자인 구현 가능

    ￭ WindowBuilder 설치

    1. Help에서 Eclipse Marketplace 클릭
    2. Windows 검색 후 WindowBuilder Current 설치
    3. Confirm 후 동의하여 종료

     

    2. 예시

    ￭ User

    package usermanagement.entity;

import lombok.Builder;
import lombok.Data;

@Builder
@Data
public class User {

	private String username;
	private String password;
	private String name;
	private String email;

}

    ￭ UserRepository

    package usermanagement.repository;

import java.util.ArrayList;
import java.util.List;

import org.mindrot.jbcrypt.BCrypt;

import usermanagement.entity.User;

public class UserRepository {

	private List<User> userDataList;

	private static UserRepository instance;

	public static UserRepository getInstance() {
		if (instance == null) {
			instance = new UserRepository();
		}
		return instance;
	}

	public UserRepository() {
		userDataList = new ArrayList<>();
		userDataList.add(User.builder()
				.username("aaa")
				.password(BCrypt.hashpw("1234", BCrypt.gensalt())).name("김준일")
				.email("aaa@gmial")
				.build());
	}

	public void saveUser(User user) {
		userDataList.add(user);
	}

	public User findUserByUsername(String username) {
		User user = null;

		for (User u : userDataList) {
			if (u.getUsername().equals(username)) {
				user = u;
				break;
			}
		}

		return user;
	}

	public User findUserByEmail(String email) {
		User user = null;

		for (User u : userDataList) {
			if (u.getEmail().equals(email)) {
				user = u;
				break;
			}
		}

		return user;
	}
}

    ￭ UserService

    package usermanagement.service;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import org.mindrot.jbcrypt.BCrypt;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import usermanagement.entity.User;
import usermanagement.repository.UserRepository;

public class UserService {

	private UserRepository userRepository;
	private Gson gson;

	private static UserService instance;

	public static UserService getInstance() {
		if (instance == null) {
			instance = new UserService();
		}
		return instance;
	}

	private UserService() {
		userRepository = UserRepository.getInstance();
		gson = new GsonBuilder().setPrettyPrinting().create();
	}

	public Map<String, String> register(String userJson) {
		// reponse : 응답
		Map<String, String> response = new HashMap<>();
		// 반복 작업을 하기 위해서 Map형태로 변환
		Map<String, String> userMap = gson.fromJson(userJson, Map.class);
		for (Entry<String, String> userEntry : userMap.entrySet()) {
			// isBlank는 스페이스를 공백으로 봄
			if (userEntry.getValue().isBlank()) {
				response.put("error", userEntry.getKey() + "은(는) 공백일 수 없습니다.");
				return response;
			}
		}

		User user = gson.fromJson(userJson, User.class);
		System.out.println("서비스에 넘어옴! User 객체로 변환");
		System.out.println(user);

		if (duplicatedUsername(user.getUsername())) {
			response.put("error", "이미 사용중인 사용자 이름입니다.");
			return response;
		}

		if (duplicatedEmail(user.getEmail())) {
			response.put("error", "이미 사용중인 이메일입니다.");
			return response;
		}

        // password를 암호화한 것을 pw에 대입
//		String pw = BCrypt.hashpw("1234", BCrypt.gensalt());
//		System.out.println(pw);
//		System.out.println(BCrypt.checkpw("1234", pw));

		user.setPassword(BCrypt.hashpw(user.getPassword(), BCrypt.gensalt()));
		System.out.println("암호화 후");
		System.out.println(user);

		userRepository.saveUser(user);

		response.put("ok", "회원가입 성공.");

		return response;
	}

	private boolean duplicatedUsername(String username) {
		return userRepository.findUserByUsername(username) != null;
	}

	private boolean duplicatedEmail(String email) {
		return userRepository.findUserByEmail(email) != null;
	}

	public Map<String, String> authorize(String loginUserJson) {
		Map<String, String> loginUser = gson.fromJson(loginUserJson, Map.class);

		Map<String, String> response = new HashMap<>();

		for (Entry<String, String> entry : loginUser.entrySet()) {
			if (entry.getValue().isBlank()) {
				response.put("error", entry.getKey() + "은(는) 공백일 수 없습니다.");
				return response;
			}
		}

		String usernameAndEmail = loginUser.get("usernameAndEmail");

		User user = userRepository.findUserByUsername(usernameAndEmail);
		if (user == null) {
			user = userRepository.findUserByEmail(usernameAndEmail);
			if (user == null) {
				response.put("error", "사용자 정보를 확인해주세요");
			}
		}

		if (!BCrypt.checkpw(loginUser.get("password"), user.getPassword())) {
			response.put("error", "사용자 정보를 확인해주세요");
		}

		response.put("ok", user.getName() + "님 환영합니다.");
		return response;
	}
}

    ￭ UserManagementFrame

    package usermanagement.frame;

import java.awt.CardLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

import com.google.gson.JsonObject;

import usermanagement.service.UserService;

public class UserManagementFrame extends JFrame {

	private List<JTextField> loginFields;
	private List<JTextField> registerFields;

	private CardLayout mainCard;
	private JPanel mainPanel;
	private JTextField usernameField;
	private JPasswordField passwordField;
	private JTextField registerUsernameField;
	private JPasswordField registerPasswordField;
	private JTextField registerNameField;
	private JTextField registerEmailField;

	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					UserManagementFrame frame = new UserManagementFrame();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	public UserManagementFrame() {
		loginFields = new ArrayList<>();
		registerFields = new ArrayList<>();

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 400, 500);
		mainPanel = new JPanel();
		mainPanel.setLocation(0, 0);
		mainPanel.setBackground(new Color(255, 255, 255));
		mainPanel.setBorder(null);

		setContentPane(mainPanel);

		mainCard = new CardLayout();
		mainPanel.setLayout(mainCard);

		JPanel loginPanel = new JPanel();
		loginPanel.setBackground(new Color(255, 255, 255));

		mainPanel.add(loginPanel, "loginPanel");
		loginPanel.setLayout(null);

		JLabel LogoText = new JLabel("UserManagement");
		LogoText.setFont(new Font("Arial", Font.BOLD, 20));
		LogoText.setHorizontalAlignment(SwingConstants.CENTER);
		LogoText.setBounds(75, 50, 250, 50);
		loginPanel.add(LogoText);

		JLabel LoginText = new JLabel("Login");
		LoginText.setFont(new Font("Arial", Font.PLAIN, 30));
		LoginText.setHorizontalAlignment(SwingConstants.CENTER);
		LoginText.setBounds(115, 100, 170, 50);
		loginPanel.add(LoginText);

		usernameField = new JTextField();
		usernameField.setFont(new Font("Arial", Font.PLAIN, 12));
		usernameField.setBounds(75, 220, 250, 30);
		loginPanel.add(usernameField);
		usernameField.setColumns(10);

		passwordField = new JPasswordField();
		passwordField.setFont(new Font("Arial", Font.PLAIN, 12));
		passwordField.setBounds(75, 280, 250, 30);
		loginPanel.add(passwordField);

		JLabel usernameLable = new JLabel("Username or email");
		usernameLable.setFont(new Font("Arial", Font.PLAIN, 12));
		usernameLable.setBounds(75, 200, 120, 15);
		loginPanel.add(usernameLable);

		JLabel passwordLable = new JLabel("Password");
		passwordLable.setFont(new Font("Arial", Font.PLAIN, 12));
		passwordLable.setBounds(75, 260, 60, 15);
		loginPanel.add(passwordLable);

		JButton loginButton = new JButton("Login");

		loginButton.addMouseListener(new MouseAdapter() {
            // 인터페이스는 모두 구현해야함
            // MouseAdapter내에 인터페이스를 모두 구현해놓음
            // 사용하고 싶은 메소드만 오버라이드하여 사용가능
			@Override
			public void mouseClicked(MouseEvent e) {
				JsonObject loginUser = new JsonObject();
				loginUser.addProperty("usernameAndEmail", usernameField.getText());
				loginUser.addProperty("password", passwordField.getText());

				UserService userService = UserService.getInstance();

				Map<String, String> response = userService.authorize(loginUser.toString());

				if (response.containsKey("error")) {
					JOptionPane.showMessageDialog(null, response.get("error"), "error", JOptionPane.ERROR_MESSAGE);
					return;
				}
				
				JOptionPane.showMessageDialog(null, response.get("ok"), "ok", JOptionPane.INFORMATION_MESSAGE);
				
			}
		});

		loginButton.setBackground(new Color(192, 192, 192));
		loginButton.setFont(new Font("Arial", Font.PLAIN, 18));
		loginButton.setBounds(75, 320, 250, 30);
		loginPanel.add(loginButton);

		JLabel signupDescription = new JLabel("Don't have an account?");
		signupDescription.setFont(new Font("Arial", Font.PLAIN, 12));
		signupDescription.setBounds(75, 360, 130, 15);
		loginPanel.add(signupDescription);

		JLabel signupLink = new JLabel("Sign up");
		signupLink.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
                // mainPanel에서 registerPanel 키 값을 가진 화면을 보여줌
				mainCard.show(mainPanel, "registerPanel");
                // loginFields를 공백으로 만듬
				clearFields(loginFields);
			}
		});
		signupLink.setForeground(new Color(0, 128, 255));
		signupLink.setFont(new Font("Arial", Font.PLAIN, 12));
		signupLink.setBounds(210, 360, 50, 15);
		loginPanel.add(signupLink);

		JLabel forgotPasswordLink = new JLabel("Forgot your password?");
		forgotPasswordLink.setFont(new Font("Arial", Font.PLAIN, 12));
		forgotPasswordLink.setForeground(new Color(0, 128, 255));
		forgotPasswordLink.setBounds(75, 380, 130, 15);
		loginPanel.add(forgotPasswordLink);

		JPanel registerPanel = new JPanel();
		registerPanel.setBackground(new Color(255, 255, 255));
		mainPanel.add(registerPanel, "registerPanel");
		registerPanel.setLayout(null);

		JLabel signinLink = new JLabel("Sign in");
		signinLink.setForeground(new Color(0, 128, 255));
		signinLink.setFont(new Font("Arial", Font.PLAIN, 12));
		signinLink.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
                // mainPanel에서 loginPanel 키 값을 가진 화면을 보여줌
				mainCard.show(mainPanel, "loginPanel");
                // registerFields를 공백으로 만듬
				clearFields(registerFields);
			}
		});
		signinLink.setHorizontalAlignment(SwingConstants.CENTER);
		signinLink.setBounds(175, 440, 50, 15);
		registerPanel.add(signinLink);

		JLabel registerLogoText = new JLabel("UserManagement");
		registerLogoText.setHorizontalAlignment(SwingConstants.CENTER);
		registerLogoText.setFont(new Font("Arial", Font.BOLD, 20));
		registerLogoText.setBounds(75, 50, 250, 50);
		registerPanel.add(registerLogoText);

		JLabel RegisterText = new JLabel("Register");
		RegisterText.setHorizontalAlignment(SwingConstants.CENTER);
		RegisterText.setFont(new Font("Arial", Font.PLAIN, 30));
		RegisterText.setBounds(115, 100, 170, 50);
		registerPanel.add(RegisterText);

		registerUsernameField = new JTextField();
		registerUsernameField.setFont(new Font("Arial", Font.PLAIN, 12));
		registerUsernameField.setColumns(10);
		registerUsernameField.setBounds(75, 170, 250, 30);
		registerPanel.add(registerUsernameField);

		registerPasswordField = new JPasswordField();
		registerPasswordField.setFont(new Font("Arial", Font.PLAIN, 12));
		registerPasswordField.setBounds(75, 230, 250, 30);
		registerPanel.add(registerPasswordField);

		JLabel registerusernameLable = new JLabel("Username");
		registerusernameLable.setFont(new Font("Arial", Font.PLAIN, 12));
		registerusernameLable.setBounds(75, 150, 120, 15);
		registerPanel.add(registerusernameLable);

		JLabel registerpasswordLable = new JLabel("Password");
		registerpasswordLable.setFont(new Font("Arial", Font.PLAIN, 12));
		registerpasswordLable.setBounds(75, 210, 60, 15);
		registerPanel.add(registerpasswordLable);

		registerNameField = new JTextField();
		registerNameField.setFont(new Font("HY견고딕", Font.PLAIN, 12));
		registerNameField.setColumns(10);
		registerNameField.setBounds(75, 290, 250, 30);
		registerPanel.add(registerNameField);

		JLabel registernameLable = new JLabel("name");
		registernameLable.setFont(new Font("Arial", Font.PLAIN, 12));
		registernameLable.setBounds(75, 270, 120, 15);
		registerPanel.add(registernameLable);

		registerEmailField = new JTextField();
		registerEmailField.setFont(new Font("Arial", Font.PLAIN, 12));
		registerEmailField.setColumns(10);
		registerEmailField.setBounds(75, 350, 250, 30);
		registerPanel.add(registerEmailField);

		JLabel registeremailLable = new JLabel("email");
		registeremailLable.setFont(new Font("Arial", Font.PLAIN, 12));
		registeremailLable.setBounds(75, 330, 120, 15);
		registerPanel.add(registeremailLable);

		JButton registerButton = new JButton("Register");
		registerButton.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				JsonObject userJson = new JsonObject();
				userJson.addProperty("username", registerUsernameField.getText());
				userJson.addProperty("password", registerPasswordField.getText());
				userJson.addProperty("name", registerNameField.getText());
				userJson.addProperty("email", registerEmailField.getText());

				System.out.println(userJson.toString());

				UserService userService = UserService.getInstance();

				Map<String, String> response = userService.register(userJson.toString());

				if (response.containsKey("error")) {
					JOptionPane.showMessageDialog(null, response.get("error"), "error", JOptionPane.ERROR_MESSAGE);
					return;
				}
				JOptionPane.showMessageDialog(null, response.get("ok"), "ok", JOptionPane.INFORMATION_MESSAGE);
				mainCard.show(mainPanel, "loginPanel");
                // registerFields를 공백으로 만듬
				clearFields(registerFields);
			}
		});
		registerButton.setFont(new Font("Arial", Font.PLAIN, 18));
		registerButton.setBackground(Color.LIGHT_GRAY);
		registerButton.setBounds(75, 400, 250, 30);
		registerPanel.add(registerButton);

		loginFields.add(usernameField);
		loginFields.add(passwordField);

		registerFields.add(registerUsernameField);
		registerFields.add(registerPasswordField);
		registerFields.add(registerNameField);
		registerFields.add(registerEmailField);
	}

	private void clearFields(List<JTextField> textFields) {
		for (JTextField field : textFields) {
			// 공백이라도 있으면 setText("") 실행
			if (field.getText().isEmpty()) {
				continue;
			}
			field.setText("");
		}
	}
}

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