学生管理系统

一、整体列表总览

• 登录文件——LoginFrame

package net.zwh.p03.t09.gui;

import net.zwh.p03.t09.bean.User;
import net.zwh.p03.t09.service.UserService;

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

/**
 * 功能：用户登录窗口
 * 作者：曾文浩
 * 日期：2022年06月09日
 */
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 btnSign;

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

    /**
     * 有参构造方法
     *
     * @param title
     */
    public LoginFrame(String title) {
        super(title);
        initGUI(); // 调用初始化图形用户界面方法
        eventsHandling(); // 调用事件处理方法
    }

    /**
     * 事件处理
     */
    private void eventsHandling() {
        // 给【确定】按钮注册监听器
        btnOK.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 获取用户输入的用户名和密码
                username = txtUsername.getText().trim();
                password = new String(txtPassword.getPassword());
                // 创建用户服务对象
                UserService userService = new UserService();
                // 调用服务对象的登录方法
                User user = userService.login(username, password);
                // 判断用户登录是否成功
                if (user != null) {
                    // 弹出消息提示窗口
                    try {
                        new Main();
                        JOptionPane.showMessageDialog(null, "恭喜【"+ username + "】登录成功~");
                    } catch (IOException ioException) {
                        System.err.println("失败~");
                    }
                    dispose();
                } else {
                    // 弹出消息提示窗口
                    JOptionPane.showMessageDialog(null, "【"+ username + "】登录失败~\n用户名或密码错误~");
                    // 情况两个文本框
                    txtUsername.setText("");
                    txtPassword.setText("");
                    // 让姓名文本框获取焦点
                    txtUsername.requestFocus();
                }
            }
        });

        //给取消按钮注册监听器
        btnCancel.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });

        btnSign.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                new Sign();
            }
        });
    }

    /**
     * 初始化图形用户界面方法
     */
    private void initGUI() {
        // 实例化组件（面板与控件）
        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：");
        txtUsername = new JTextField(15);
        txtPassword = new JPasswordField(15);
        btnOK = new JButton("确定[O]");
        btnCancel = new JButton("取消[C]");
        btnSign = new JButton("注册[I]");

        // 将控件添加到三个小面板
        panel1.add(lblUsername);
        panel1.add(txtUsername);
        panel2.add(lblPassword);
        panel2.add(txtPassword);
        panel3.add(btnOK);
        panel3.add(btnCancel);
        panel4.add(btnSign);

        // 设置主面板为三行一列的网格布局
        panel.setLayout(new GridLayout(4, 1));
        // 将三个小面板依次添加到主面板
        panel.add(panel1);
        panel.add(panel2);
        panel.add(panel3);
        panel.add(panel4);

        // 设置按钮热键字母
        btnOK.setMnemonic(KeyEvent.VK_O);
        btnCancel.setMnemonic(KeyEvent.VK_C);
        btnSign.setMnemonic(KeyEvent.VK_I);
        // 设置密码框回显字符
        txtPassword.setEchoChar('*');

        // 设置窗口大小
        setSize(700, 500);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }


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

• 主文件——Main

package net.zwh.p03.t09.gui;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;

public class Main extends JFrame implements ActionListener{
    public static void main(String[] args) throws IOException {
        new Main();
        final int WIDTH=800;//设置窗口的宽
        final int HEIGHT=500;//设置窗口的高
    }

    //面板控件
    private JLabel queryLab = null;
    private JTextField queryTxt = null;
    private JButton queryBtn = null;
    private JButton allBtn = null;
    private JTable resultTb = null;
    private JScrollPane jsp = null;
    private JButton addBtn = null;
    private JButton deleteBtn = null;
    private JButton updateBtn = null;
    private JPanel top = null;
    private JPanel bottom = null;

    private Model sm = null;

    //构造函数
    public Main() throws IOException {
        super("学生管理系统");

        //查询栏
        queryLab = new JLabel("请输入姓名:");
        queryTxt = new JTextField(10);
        queryBtn = new JButton("查询");
        allBtn = new JButton("全部");
        //添加查询栏监听
        queryBtn.addActionListener(this);
        queryBtn.setActionCommand("query");
        allBtn.addActionListener(this);
        allBtn.setActionCommand("all");
        //增删改栏
        addBtn = new JButton("添加");
        deleteBtn = new JButton("删除");
        updateBtn = new JButton("修改");
        //添加增删改栏监听
        addBtn.addActionListener(this);
        addBtn.setActionCommand("add");
        deleteBtn.addActionListener(this);
        deleteBtn.setActionCommand("delete");
        updateBtn.addActionListener(this);
        updateBtn.setActionCommand("update");
        //创建窗口整体布局
        //顶层查询栏
        top = new JPanel();
        top.add(queryLab);
        top.add(queryTxt);
        top.add(queryBtn);
        top.add(allBtn);
        //底层增删改栏
        bottom = new JPanel();
        bottom.add(addBtn);
        bottom.add(deleteBtn);
        bottom.add(updateBtn);
        //中间层显示栏
        sm = new Model();
        String sql = "select * from stu";
        sm.queryStu(sql, null);
        resultTb = new JTable(sm);
        jsp = new JScrollPane(resultTb);
        //构建整体布局
        this.add(top,BorderLayout.NORTH);
        this.add(jsp,BorderLayout.CENTER);
        this.add(bottom,BorderLayout.SOUTH);
        //设置窗口属性
        this.setBounds(500,250,500,300);
//        this.setIconImage(ImageIO.read(new File("D:\\yuandaima\\shishuo\\src\\studentManage\\img\\登录.png")));
        this.setVisible(true);
        this.setResizable(false);
    }

    //监听
    @Override
    public void actionPerformed(ActionEvent e)
    {
        // TODO Auto-generated method stub
        if(e.getActionCommand().equals("query")) {
            //查询
            //获取输入学生的姓名
            String name = queryTxt.getText().trim();
            if(name.length() != 0) {
                //姓名输入有效时，执行查询
                //定义参数
                String sql = "select * from stu where stuName=?";
                String []paras = {name};
                //更新模型
                jtableUpdate(sql, paras);
            } else {
                //姓名为空时，设置提醒
                JOptionPane.showMessageDialog(this, "姓名输入不能为空");
            }
        } else if(e.getActionCommand().equals("add")) {
            //添加
            new Add(this, "添加学生信息", true);
            String sql = "select * from stu";
            jtableUpdate(sql, null);
        } else if(e.getActionCommand().equals("all")) {
            //全部显示
            String sql = "select * from stu";
            jtableUpdate(sql, null);
        } else if(e.getActionCommand().equals("delete")) {
            //删除
            //获取选择行号
            int rowNum = this.resultTb.getSelectedRow();
            if(rowNum == -1) {
                JOptionPane.showMessageDialog(this, "请选择一行");
                return ;
            }
            //获取学生ID号
            String stuId = (String)sm.getValueAt(rowNum, 0);
            //删除学生
            String sql = "delete from stu where stuId=?";
            String []paras = {stuId};
            Model tmp = new Model();
            tmp.cudStu(sql, paras);
            //更新模型
            sql = "select * from stu";
            jtableUpdate(sql, null);
        } else if(e.getActionCommand().equals("update")) {
            //修改
            //获取选择行号
            int rowNum = this.resultTb.getSelectedRow();
            if(rowNum == -1) {
                JOptionPane.showMessageDialog(this, "请选择一行");
                return ;
            }
            new Set(this, "修改学生信息", true, sm, rowNum);
            String sql = "select * from stu";
            jtableUpdate(sql, null);
        }
    }

    //更新JTable内数据
    public void jtableUpdate(String sql, String[] paras)
    {
        //创建模型
        sm = new Model();
        sm.queryStu(sql, paras);
        //更新显示
        resultTb.setModel(sm);
    }

}

二、效果预览

• 登录界面
  

• 登录成功
  

• 添加学生信息
  
  

• 查询
  

三、所有代码下载链接

链接: ☞代码所在 提取码: ntie