学生信息系统设计-优快云博客

本文链接：https://blog.youkuaiyun.com/m0_46470018/article/details/107243169

作者：康鑫
时间：2020.07.10

（九）创建应用程序类

1、在net.kx.student包里创建app子包
2、在net.kx.student.app包里创建Application类
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package net.kx.student.app;

import net.kx.student.gui.LoginFrame;
import net.kx.student.gui.MainFrame;
import net.kx.student.gui.RegisterFrame;

/**
 * 功能：应用程序类，存放全局数据
 * 作者：康鑫
 * 日期：2020.07.10
 */
public class Application {
    public static int id; // 登录用户标识符
    public static String username; // 登录用户名
    public static String password; // 登录用户密码
    public static LoginFrame loginFrame; // 登录窗口
    public static MainFrame mainFrame; // 主窗口
    public static RegisterFrame registerFrame; // 注册窗口
    public static RegisterFrame reisterFrame;
}

（十）创建窗口界面类
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1、创建主界面窗口MainFrame

package net.kx.student.gui;
import javax.swing.*;

import net.kx.student.app.Application;
import net.kx.student.dao.impl.StatusServiceImpl;
import net.kx.student.service.StatusService;
import net.kx.student.bean.Status;

public class MainFrame extends JFrame{
    private Status status;
    private StatusService statusService;

    public MainFrame(String title){
        super(title);
        initGUI();
    }
        public void initGUI(){
        statusService = (StatusService) new StatusServiceImpl();
        status = statusService.findStatusById(1);

        setSize(800,640);
        setVisible(true);
        setLocationRelativeTo(null);
        setTitle("学生信息管理系统"+status.getVersion());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        Application.mainFrame = new MainFrame("");
    }
}

2、创建用户登录窗口LoginFrame
在这里插入图片描述

package net.kx.student.gui;

import net.kx.student.app.Application;
import net.kx.student.bean.Status;
import net.kx.student.bean.User;
import net.kx.student.service.StatusService;
import net.kx.student.service.UserService;
import net.kx.student.service.impl.StatusServiceImpl;
import net.kx.student.service.impl.UserServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

public class LoginFrame extends JFrame {
    private String username;
    private String password;

    private JLabel lblUsername;
    private JLabel lblPassword;
    private JTextField txtUsername;
    private JPasswordField txtPassword;

    private JButton btnOK;
    private JButton btnCancel;
    private JButton btnRegister;

    private JPanel panel,panel1,panel2,panel3;

    public LoginFrame(String title){
        super(title);
        intiGUI();
    }

    public void intiGUI(){
        panel = (JPanel)getContentPane();
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();

        lblUsername = new JLabel("用户名");
        txtUsername = new JTextField(15);
        lblPassword = new JLabel("密   码");
        txtPassword = new JPasswordField(15);
        btnOK = new JButton("确定[O]");
        btnCancel = new JButton("取消[C]");
        btnRegister = new JButton("注册[R]");

        panel1.add(lblUsername);
        panel1.add(txtUsername);
        panel2.add(lblPassword);
        panel2.add(txtPassword);
        panel3.add(btnOK);
        panel3.add(btnCancel);
        panel3.add(btnRegister);

        panel.setLayout(new GridLayout(3,1));
        panel.add(panel1);
        panel.add(panel2);
        panel.add(panel3);

        btnOK.setMnemonic(KeyEvent.VK_0);
        btnCancel.setMnemonic(KeyEvent.VK_C);
        btnRegister.setMnemonic(KeyEvent.VK_R);

        txtPassword.setEchoChar('*');

        setSize(350,225);
        setLocationRelativeTo(null);
        setResizable(false);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        btnOK.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                login();
            }
        });
        btnCancel.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });
        btnRegister.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Application.loginFrame.setVisible(false);
                Application.reisterFrame = new RegisterFrame("用户注册");
            }
        });
    }
    /**
     * 登录方法
     */
    private void login() {
        // 获取用户名
        username = txtUsername.getText().trim();
        // 获取密码
        password = new String(txtPassword.getPassword());

        // 创建用户服务对象
        UserService userService = (UserService) new UserServiceImpl();
        // 调用登录方法，返回登录用户对象
        User user = userService.login(username, password);

        // 判断登录用户是否为空，决定登录是否成功
        if (user != null) {
            // 隐藏登录窗口
            Application.loginFrame.setVisible(false);
            // 定义状态服务对象
            StatusService statusService = (StatusService) new StatusServiceImpl();
            // 获取状态对象
            Status status = statusService.findStatusById(1);
            // 保存登录用户的信息
            Application.id = user.getId();
            Application.username = user.getUsername();
            Application.password = user.getPassword();
            // 提示用户登录成功
            JOptionPane.showMessageDialog(null,
                    "欢迎使用学生信息管理系统" + status.getVersion(),
                    "用户登录", JOptionPane.INFORMATION_MESSAGE);
            // 显示系统主窗口
            Application.mainFrame = new MainFrame("");
            // 释放登录窗口
            Application.loginFrame.dispose();
        } else {
            // 隐藏登录窗口
            Application.loginFrame.setVisible(false);
            // 提示用户登录失败，要重新输入用户名或密码
            JOptionPane.showMessageDialog(null,
                    "用户名或密码错误，请重新输入！",
                    "用户登录", JOptionPane.ERROR_MESSAGE);
            // 显示登录窗口
            Application.loginFrame.setVisible(true);
            // 用户名文本框内容全选
            txtUsername.selectAll();
            // 密码文本框内容全选
            txtPassword.selectAll();
            // 用户名文本框获取焦点
            txtUsername.requestFocus();
        }
    }



    public static void main(String[] args) {
        Application.loginFrame = new LoginFrame("用户登录");
    }

}

3、创建用户注册窗口RegisterFrame
在这里插入图片描述

package net.kx.student.gui;

import net.kx.student.app.Application;
import net.kx.student.bean.User;
import net.kx.student.service.UserService;
import net.kx.student.service.impl.UserServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.Timestamp;


public class RegisterFrame extends JFrame {

    private JLabel lblUsername;
    private JLabel lblPassword;
    private JLabel lblTelephone;

    private JTextField txtUsername;
    private JTextField txtTelephone;
    private JPasswordField txtPassword;

    private JButton btnSubmit;
    private JButton btnCancel;
    private JButton btnLogin;

    private JPanel panel;
    private JPanel panel1;
    private JPanel panel2;
    private JPanel panel3;
    private JPanel panel4;

    private String username;
    private String password;
    private String telephone;
    private Timestamp registerTime;

    public RegisterFrame(String title) {

        super(title);
        initGUI();
    }

    private void initGUI() {

        panel = (JPanel) getContentPane();
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        panel4 = new JPanel();

        lblUsername = new JLabel("用户名");
        lblPassword = new JLabel("密 码");
        lblTelephone = new JLabel("电 话");
        txtUsername = new JTextField(15);
        txtPassword = new JPasswordField(15);
        txtTelephone = new JTextField(15);
        btnSubmit = new JButton("提交[S]");
        btnCancel = new JButton("取消[C]");
        btnLogin = new JButton("登录[L]");

        setSize(350, 225);
        panel1.add(lblUsername);
        panel1.add(txtUsername);
        panel2.add(lblPassword);
        panel2.add(txtPassword);
        panel3.add(lblTelephone);
        panel3.add(txtTelephone);
        panel4.add(btnSubmit);
        panel4.add(btnCancel);
        panel4.add(btnLogin);

        panel.setLayout(new GridLayout(4, 1));
        panel.add(panel1);
        panel.add(panel2);
        panel.add(panel3);
        panel.add(panel4);

        setSize(350, 225);
        setLocationRelativeTo(null);
        setResizable(false);
        setTitle("用户注册");
        setVisible(true);

        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                dispose();
                Application.loginFrame.setVisible(true);
            }
        });
        btnSubmit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                register();
            }
        });
        btnSubmit.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    register();
                }
            }
        });
        btnCancel.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Application.loginFrame.setVisible(true);

                dispose();
            }
        });
        btnLogin.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                Application.loginFrame.setVisible(true);

                dispose();
            }
        });
        txtUsername.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtPassword.requestFocus();
                }
            }
        });
        txtPassword.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == 10) {
                    txtTelephone.requestFocus();
                }
            }
        });
        txtTelephone.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    btnSubmit.requestFocus();
                }
            }
        });

    }
    public static void main(String[] args) {
        Application.reisterFrame = new RegisterFrame("用户注册");
    }

    private void register() {
        username = txtUsername.getText().trim();
        password = new String(txtPassword.getPassword());
        telephone = txtTelephone.getText().trim();
        registerTime = new Timestamp(System.currentTimeMillis());
        if (username.equals("")) {
            JOptionPane.showMessageDialog(null, "用户名不能为空！", "学生管理系统，",
                    JOptionPane.WARNING_MESSAGE);
            txtUsername.requestFocus();
            return;
        }
        if (txtPassword.equals("")) {
            JOptionPane.showMessageDialog(null, "密码不能为空",
                    "学生信息管理系统", JOptionPane.WARNING_MESSAGE);
            txtPassword.requestFocus();
            return;
        }


        UserService userService = (UserService) new UserServiceImpl();
        User user = new User();
        user.setUsername(username);
        user.setPassword(password);
        user.setTelephone(telephone);
        user.setRegisterTime(registerTime);

        int count = userService.addUser(user);
        if (count > 0) {
            setVisible(false);
            JOptionPane.showMessageDialog(null, "恭喜，注册成功！",
                    "学生信息管理系统", JOptionPane.INFORMATION_MESSAGE);
            setVisible(true);
        } else {
            JOptionPane.showMessageDialog(null, "遗憾！注册失败",
                    "学生信息管理系统", JOptionPane.INFORMATION_MESSAGE);
        }

    }
}

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第六次实训