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最新推荐文章于 2024-05-07 19:55:42 发布

SO_IF_ELSE

最新推荐文章于 2024-05-07 19:55:42 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/SO_IF_ELSE/article/details/94621726

本文详细介绍了一个学生信息管理系统的用户界面设计，包括登录界面、注册界面和主界面的实现细节，涵盖了组件布局、事件处理和系统功能模块。

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制作图像界面
在这里插入图片描述
主要说明登陆界面LoginFrame注册界面RegisterFrame和主界面框架MainFrame其余为主界面的功能模块
LoginFrame：
package net.zzq.student.gui;
import net.zzq.student.app.Application;
import net.zzq.student.bean.Status;
import net.zzq.student.bean.User;
import net.zzq.student.service.StatusService;
import net.zzq.student.service.UserService;
import net.zzq.student.service.impl.StatusServiceImpl;
import net.zzq.student.service.impl.UserServiceImpl;

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

/**

功能：登录窗口
作者：郑志强
日期：2019年7月1日
/
public class LoginFrame extends JFrame{
/*
- 构造方法
- @param title
  */
  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);
initGUI();
}

/**
- 初始化图形用户界面
  */
  private void initGUI() {
  //实例化组件（面板控制与控件）
  panel =(JPanel) getContentPane();
  panel1=new JPanel();
  panel2=new JPanel();
  panel3=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]”);
  btnRegister =new JButton(“注册[R]”);
  
  //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);
  panel3.add(btnRegister);
  //设置主面板为三行一列的网格布局
  panel.setLayout(new GridLayout(3,1));
  //将三个小面板依次添加到主面板
  panel.add(panel1);
  panel.add(panel2);
  panel.add(panel3);
  // 设置按钮热键字母
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  btnRegister.setMnemonic(KeyEvent.VK_R);
  // 设置密码框回显字符
  txtPassword.setEchoChar(’*’);
  // 设置窗口大小
  setSize(250, 200);
  // 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.EXIT_ON_CLOSE);
  //【确定】按钮单击事件处理
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  login();
  }
  });
  //【确定】按钮按键事件处理
  btnOK.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode()==KeyEvent.VK_ENTER){
  login();
  }
  }
  });
  //【用户名】文本框按键事件处理
  txtUsername.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  //判断是否按下回车键
  if (e.getKeyCode()==KeyEvent.VK_ENTER) {
  //让密码文本框获取焦点
  txtPassword.requestFocus();
  }
  }
  });
  //【密码】按钮单击事件SE处理
  txtPassword.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() ==KeyEvent.VK_ENTER) {
  login();
  }
  }
  });
  //【取消】按钮单击事件处理
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  System.exit(0);
  }
  });
  //【注册】按钮单击事件处理
  btnRegister.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  //隐藏登陆窗口
  Application.loginFrame.setVisible(false);
  //创建注册窗口
  Application.registerFrame=new RegisterFrame(“用户注册”);
```
 }
```
  });
  }
  /**
- 登陆方法
  /
  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 =new UserServiceImpl();
  //调用登陆用户方法，返回登陆用户对象
  User user =userService.login(username,password);
  //判断登陆用户是否为空，决定登陆是否成功
  if (user !=null){
  //隐藏登陆窗口
  Application.loginFrame.setVisible(false);
  //定义状态服务对象
  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();
  }
  }
  /*
- 主方法
- @param args
  */
  public static void main(String[] args) {
  Application.loginFrame = new LoginFrame(“用户登录”);
  }

}
RegisterFrame：
package net.zzq.student.gui;

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

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import java.sql.Timestamp;
import java.util.Date;
/**

功能：注册窗口
作者：郑志强
日期：2019年7月1日
/
public class RegisterFrame extends JFrame {
/*
- 标签
  /
  private JLabel lblUsername;
  private JLabel lblPassword;
  private JLabel lblTelephone;
  /*
- 文本框
  /
  private JTextField txtUsername;
  private JTextField txtTelephone;
  private JPasswordField txtPassword;
  /*
- 按钮
  /
  private JButton btnSubmit;
  private JButton btnCancel;
  private JButton btnLogin;
  /*
- 面板
  */
  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 Date registerTime;

/**
- 构造方法
- @param title
  */
  public RegisterFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化图形用户界面
  */
  private void initGUI() {
  // 创建组件（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：”);
  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]”);
  // 将控件添加到四个小面板
  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);
  
  // 设置大面板布局，将四个小面板添加到大面板
  panel.setLayout(new GridLayout(4, 1));
  panel.add(panel1);
  panel.add(panel2);
  panel.add(panel3);
  panel.add(panel4);
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口标题
  setTitle(“用户注册”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作（卸载当前窗口）
  setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
  // 注册窗口监听器
  addWindowListener(new WindowAdapter() {
  @Override
  public void windowClosing(WindowEvent e) {
  // 卸载当前窗口——注册窗口
  dispose();
  // 让登录窗口可见
  Application.loginFrame.setVisible(true);
  }
  });
  // 【提交】按钮单击事件处理
  btnSubmit.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  register();
  }
  });
  // 【提交】按钮按键事件处理
  btnSubmit.addKeyListener(new KeyAdapter() {
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  register();
  }
  }
  });
  // 【取消】按钮单击事件处理
  btnCancel.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  // 显示登录窗口
  Application.loginFrame.setVisible(true);
  // 卸载当前窗口
  dispose();
  }
  });
  // // 【登录】按钮单击事件处理
  // btnLogin.addActionListener(new ActionListener() {
  // @Override
  // public void actionPerformed(ActionEvent arg0) {
  // // 显示登录窗口
  // Application.loginFrame.setVisible(true);
  // // 卸载当前窗口
  // dispose();
  // }
  // });
  btnLogin.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  // 显示登录窗口
  Application.registerFrame.setVisible(false);
  //创建注册窗口
  Application.loginFrame=new LoginFrame(“用户登陆”);
  }
  });
  // 【用户名】文本框按键事件处理
  txtUsername.addKeyListener(new KeyAdapter() {
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtPassword.requestFocus();
  }
  }
  });
  
  // 【密码】文本框按键事件处理
  txtPassword.addKeyListener(new KeyAdapter() {
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == 10) {
  txtTelephone.requestFocus();
  }
  }
  });
  
  // 【电话】文本框按键事件处理
  txtTelephone.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  btnSubmit.requestFocus();
  }
  }
  });
  }
  private void register(){
  // 获取用户名
  username = txtUsername.getText().trim();
  // 获取密码
  password = new String(txtPassword.getPassword());
  // 获取电话
  telephone = txtTelephone.getText().trim();
  // 定义当前时间为注册时间
  registerTime = new Timestamp(System.currentTimeMillis());
  
  // 对用户名进行非空校验
  if (username.equals("")) {
  JOptionPane.showMessageDialog(null, “用户名不能为空！”, “学生信息管理系统”, JOptionPane.WARNING_MESSAGE);
  txtUsername.requestFocus();
  return;
  }
  
  // 对密码进行非空校验
  if (password.equals("")) {
  JOptionPane.showMessageDialog(null, “密码不能为空！”, “学生信息管理系统”, JOptionPane.WARNING_MESSAGE);
  txtPassword.requestFocus();
  return;
  }
  
  // 定义用户服务对象
  UserService userService = new UserServiceImpl();
  // 创建用户
  User user = new User();
  user.setUsername(username);
  user.setPassword(password);
  user.setTelephone(telephone);
  user.setRegisterTime(registerTime);
  //判断是否用户已存在
  boolean user1 =userService.isUsernameExisted(username);
  System.out.println(user1);
  
  if (user1 == false) {
  // 添加用户
  int count = userService.addUser(user);
  // 判断是否添加成功
  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);
  }
  }else {
  JOptionPane.showMessageDialog(null, “遗憾！注册失败，该用户已存在！”, “学生信息管理系统”, JOptionPane.INFORMATION_MESSAGE);
  }
}

/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  Application.registerFrame = new RegisterFrame("");
  }

}
MainFrame：
package net.zzq.student.gui;

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

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.io.IOException;

/**

功能：主界面窗口
```
 通过菜单系统
```
```
 调用各个功能模块
```
作者：华卫
日期：2019年6月20日
/
public class MainFrame extends JFrame {
/*
- 菜单部分
  /
  private JMenuBar mnbMain;
  /*
- 设置菜单
  /
  private JMenu mnuSet;
  private JMenuItem mniSetCollegeInfo;
  private JMenuItem mniSetStatusBar;
  private JMenuItem mniChangePassword;
  private JMenuItem mniExit;
  /*
- 操作菜单
  /
  private JMenu mnuOperate;
  private JMenuItem mniAddStudent;
  private JMenuItem mniBrowseStudent;
  private JMenuItem mniEditStudent;
  /*
- 删除菜单
  /
  private JMenu mnuDelStu;
  private JMenuItem mniDelStudentById;
  private JMenuItem mniDelStudentsByClass;
  private JMenuItem mniDelStudentsByDepartment;
  /*
- 查询菜单
  /
  private JMenu mnuFind;
  private JMenuItem mniFindStudentById;
  private JMenuItem mniFindStudentsByName;
  private JMenuItem mniFindStudentsByClass;
  private JMenuItem mniFindStudentsByDepartment;
  /*
- 统计菜单
  /
  private JMenu mnuCount;
  private JMenuItem mniCountStudentsBySex;
  private JMenuItem mniCountStudentsByClass;
  private JMenuItem mniCountStudentsByDepartment;
  /*
- 帮助菜单
  /
  private JMenu mnuHelp;
  private JMenuItem mniHelp;
  private JMenuItem mniAbout;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlSouth;
  /*
- 状态栏标签
  /
  private JLabel lblStatusBar;
  /*
- 背景标签
  */
  private JLabel lblBackground;
/**
- 图标对象
  /
  private ImageIcon imgCollege;
  private ImageIcon imgExit;
  private ImageIcon imgPassword;
  private ImageIcon imgQuery;
  private ImageIcon imgBrowse;
  private ImageIcon imgCount;
  private ImageIcon imgBackground;
  /*
- 工具栏
  /
  private JToolBar toolbar;
  /*
- 按钮
  /
  private JButton btnSetCollege;
  private JButton btnChangePassword;
  private JButton btnFindStudentById;
  private JButton btnExit;
  private JButton btnBrowseStudent;
  private JButton btnCountByDepartment;
  /*
- 状态对象
  /
  private Status status;
  /*
- 状态服务对象
  */
  private StatusService statusService;
/**
- 构造方法
- @param title
  */
  public MainFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化图形用户界面
  */
  private void initGUI() {
  // 创建主菜单
  mnbMain = new JMenuBar();
  
  // 创建【设置】菜单及其菜单项
  mnuSet = new JMenu(“系统设置[S]”);
  mnuSet.setMnemonic(KeyEvent.VK_S);
  mniSetCollegeInfo = new JMenuItem(“学校信息”);
  mniSetStatusBar = new JMenuItem(“状态栏信息”);
  mniChangePassword = new JMenuItem(“修改密码”);
  mniExit = new JMenuItem(“退出系统”);
  
  // 创建【操作】菜单及其菜单项
  mnuOperate = new JMenu(“数据操作[O]”);
  mnuOperate.setMnemonic(KeyEvent.VK_O);
  mniAddStudent = new JMenuItem(“增加学生表记录”);
  mnuDelStu = new JMenu(“删除学生表记录”);
  mniEditStudent = new JMenuItem(“编辑学生表记录”);
  mniBrowseStudent = new JMenuItem(“浏览学生表记录”);
  
  // 创建【删除学生表记录】的子菜单
  mniDelStudentById = new JMenuItem(“按学号删除”);
  mniDelStudentsByClass = new JMenuItem(“按班级删除”);
  mniDelStudentsByDepartment = new JMenuItem(“按系部删除”);
  
  // 创建【查询】菜单及其菜单项
  mnuFind = new JMenu(“查询学生[Q]”);
  mnuFind.setMnemonic(KeyEvent.VK_Q);
  mniFindStudentById = new JMenuItem(“按学号查询”);
  mniFindStudentsByName = new JMenuItem(“按姓名查询”);
  mniFindStudentsByClass = new JMenuItem(“按班级查询”);
  mniFindStudentsByDepartment = new JMenuItem(“按系部查询”);
  
  // 创建【统计】菜单及其菜单项
  mnuCount = new JMenu(“人数统计[C]”);
  mnuCount.setMnemonic(KeyEvent.VK_C);
  mniCountStudentsBySex = new JMenuItem(“按性别统计”);
  mniCountStudentsByClass = new JMenuItem(“按班级统计”);
  mniCountStudentsByDepartment = new JMenuItem(“按系部统计”);
  
  // 创建【帮助】菜单及其菜单项
  mnuHelp = new JMenu(“帮助[H]”);
  mnuHelp.setMnemonic(KeyEvent.VK_H);
  mniHelp = new JMenuItem(“帮助”);
  mniAbout = new JMenuItem(“关于”);
  
  // 创建图标对象
  imgCollege = new ImageIcon(“images/college.png”);
  imgPassword = new ImageIcon(“images/password.png”);
  imgQuery = new ImageIcon(“images/query.png”);
  imgBrowse = new ImageIcon(“images/browse.png”);
  imgCount = new ImageIcon(“images/count.png”);
  imgExit = new ImageIcon(“images/exit.png”);
  
  // 创建工具栏
  toolbar = new JToolBar();
  btnSetCollege = new JButton(“设置学校”, imgCollege);
  btnSetCollege.setToolTipText(“设置学校信息”);
  btnSetCollege.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnSetCollege.setHorizontalTextPosition(AbstractButton.CENTER);
  btnChangePassword = new JButton(“修改密码”, imgPassword);
  btnChangePassword.setToolTipText(“修改用户密码”);
  btnChangePassword.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnChangePassword.setHorizontalTextPosition(AbstractButton.CENTER);
  btnBrowseStudent = new JButton(“浏览学生”, imgBrowse);
  btnBrowseStudent.setToolTipText(“浏览学生记录”);
  btnBrowseStudent.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnBrowseStudent.setHorizontalTextPosition(AbstractButton.CENTER);
  btnFindStudentById = new JButton(“查询学生”, imgQuery);
  btnFindStudentById.setToolTipText(“按学号查询学生记录”);
  btnFindStudentById.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnFindStudentById.setHorizontalTextPosition(AbstractButton.CENTER);
  btnCountByDepartment = new JButton(“统计人数”, imgCount);
  btnCountByDepartment.setToolTipText(“按系部统计学生人数”);
  btnCountByDepartment.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnCountByDepartment.setHorizontalTextPosition(AbstractButton.CENTER);
  btnExit = new JButton(“退出系统”, imgExit);
  btnExit.setToolTipText(“退出系统”);
  btnExit.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnExit.setHorizontalTextPosition(AbstractButton.CENTER);
  toolbar.add(btnSetCollege);
  toolbar.add(btnChangePassword);
  toolbar.add(btnBrowseStudent);
  toolbar.add(btnFindStudentById);
  toolbar.add(btnCountByDepartment);
  toolbar.add(btnExit);
  
  // 创建面板
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  pnlSouth.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  // 创建背景图片
  imgBackground = new ImageIcon(“images/background.jpg”);
  // 创建背景标签
  lblBackground = new JLabel(imgBackground);
  // 创建状态栏标签
  lblStatusBar = new JLabel();
  
  // 设置菜单栏
  setJMenuBar(mnbMain);
  // 添加【设置】菜单
  mnbMain.add(mnuSet);
  mnuSet.add(mniSetCollegeInfo);
  mnuSet.add(mniSetStatusBar);
  mnuSet.add(mniChangePassword);
  mnuSet.addSeparator();
  mnuSet.add(mniExit);
  
  // 添加【删除学生表记录】菜单
  mnuDelStu.add(mniDelStudentById);
  mnuDelStu.add(mniDelStudentsByClass);
  mnuDelStu.add(mniDelStudentsByDepartment);
  
  // 添加【操作】菜单
  mnbMain.add(mnuOperate);
  mnuOperate.add(mniAddStudent);
  mnuOperate.add(mniEditStudent);
  mnuOperate.add(mnuDelStu);
  mnuOperate.add(mniBrowseStudent);
  
  // 添加【查询】菜单
  mnbMain.add(mnuFind);
  mnuFind.add(mniFindStudentById);
  mnuFind.add(mniFindStudentsByName);
  mnuFind.add(mniFindStudentsByClass);
  mnuFind.add(mniFindStudentsByDepartment);
  
  // 添加【统计】菜单
  mnbMain.add(mnuCount);
  mnuCount.add(mniCountStudentsBySex);
  mnuCount.add(mniCountStudentsByClass);
  mnuCount.add(mniCountStudentsByDepartment);
  
  // 添加【帮助】菜单
  mnbMain.add(mnuHelp);
  mnuHelp.add(mniHelp);
  mnuHelp.add(mniAbout);
  
  // 添加面板
  panel.setLayout(new BorderLayout());
  panel.add(toolbar, “North”);
  panel.add(pnlCenter, “Center”);
  panel.add(pnlSouth, “South”);
  pnlCenter.add(lblBackground);
  pnlSouth.add(lblStatusBar);
  
  // 非管理员不能设置状态栏
  if (!Application.username.equals(“zzq”)) {
  mniSetStatusBar.setEnabled(false);
  mniAddStudent.setEnabled(false);
  mnuDelStu.setEnabled(false);
  mniEditStudent.setEnabled(false);
  }
  
  // 设置状态栏信息
  setStatusBar();
  
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 获取状态对象
  status = statusService.findStatusById(1);
  
  // 设置窗口尺寸
  setSize(800, 640);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“学生信息管理系统” + status.getVersion());
  
  // 注册窗口监听器，继承窗口适配器，编写事件处理方法
  addWindowListener(new WindowAdapter() {
  @Override
  public void windowClosing(WindowEvent e) {
  exitSystem();
  }
  });
  
  // 设置菜单
  // 【设置学校信息】菜单项单击事件
  mniSetCollegeInfo.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new SetCollegeInfoFrame("");
  }
  });
  
  // 【设置状态栏信息】菜单项单击事件
  mniSetStatusBar.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new SetStatusBarFrame("");
  }
  });
  
  // 【修改密码】菜单项单击事件
  mniChangePassword.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new ChangePasswordFrame("");
  }
  });
  
  // 【退出系统】菜单项单击事件
  mniExit.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  exitSystem();
  }
  });
  
  // 查询菜单
  // 【按学号查询】菜单项单击事件
  mniFindStudentById.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentByIdFrame("");
  }
  });
  
  // 【按姓名查询】菜单项单击事件
  mniFindStudentsByName.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentsByNameFrame("");
  }
  });
  
  // 【按班级查询】菜单项单击事件
  mniFindStudentsByClass.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentsByClassFrame("");
  }
  });
  
  // 【按系部查询】菜单项单击事件
  mniFindStudentsByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentsByDepartmentFrame("");
  }
  });
  
  // 统计菜单
  // 【按性别统计人数】菜单项单击事件
  mniCountStudentsBySex.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsBySexFrame("");
  }
  });
  
  // 【按班级统计人数】菜单项单击事件
  mniCountStudentsByClass.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsByClassFrame("");
  }
  });
  
  // 【按系部统计人数】菜单项单击事件
  mniCountStudentsByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsByDepartmentFrame("");
  }
  });
  
  // 【增加学生记录】菜单项单击事件
  mniAddStudent.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  new AddStudentFrame("");
  }
  });
  
  // 【按学号删除学生记录】菜单项单击事件
  mniDelStudentById.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new DeleteStudentByIdFrame("");
  }
  });
  
  // 【按班级删除学生记录】菜单项单击事件
  mniDelStudentsByClass.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new DeleteStudentsByClassFrame("");
  }
  });
  
  // 【按系部删除学生记录】菜单项单击事件
  mniDelStudentsByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new DeleteStudentsByDepartmentFrame("");
  }
  });
  
  // 【编辑学生记录】菜单项单击事件
  mniEditStudent.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  new EditStudentFrame("");
  }
  });
  
  // 【浏览学生记录】菜单项单击事件
  mniBrowseStudent.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  new BrowseStudentsFrame("");
  }
  });
  
  // 【帮助】菜单单击事件
  mniHelp.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  try {
  Runtime.getRuntime().exec(“cmd /c start help/帮助文档.chm”);
  } catch (IOException e1) {
  JOptionPane.showMessageDialog(null, e1.getMessage(), “学生信息管理系统”, JOptionPane.ERROR_MESSAGE);
  }
  }
  });
  
  // 【关于】菜单单击事件
  mniAbout.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  JOptionPane.showMessageDialog(null,
  “开发人员：” + status.getCollege() + “_” + status.getAuthor() + “\n联系电话：” + status.getTelephone()
  + “\n电子邮箱：” + status.getEmail(),
  “学生信息管理系统” + status.getVersion(), JOptionPane.INFORMATION_MESSAGE);
  }
  });
  
  // 工具栏按钮单击事件
  // 【设置学校信息】按钮
  btnSetCollege.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new SetCollegeInfoFrame("");
  }
  });
  
  // 【修改密码】按钮
  btnChangePassword.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new ChangePasswordFrame("");
  }
  });
  
  // 【浏览】按钮
  btnBrowseStudent.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new BrowseStudentsFrame("");
  }
  });
  
  // 【查询】按钮
  btnFindStudentById.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentByIdFrame("");
  }
  });
  
  // 【统计】按钮
  btnCountByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsByDepartmentFrame("");
  }
  });
  
  // 【退出】按钮
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  exitSystem();
  }
  });
  }
/**
- 退出系统（询问用户是否要退出）
  */
  private void exitSystem() {
  int choice = JOptionPane.showConfirmDialog(this,
  “您是否要退出系统？”,“学生信息管理系统”, JOptionPane.YES_NO_OPTION);
  if (choice == JOptionPane.YES_OPTION) {
  System.exit(0);
  } else {
  // 卸载当前窗口
  dispose();
  // 重新显示主窗口
  Application.mainFrame = new MainFrame(“学生信息管理系统” + status.getVersion());
  }
  }
/**
- 设置状态栏信息
  */
  public void setStatusBar() {
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 获取状态栏对象
  status = statusService.findStatusById(1);
  // 设置状态栏标签
  lblStatusBar.setText(
  status.getCollege() + “学生信息管理系统” + status.getVersion() + " 作者：" + status.getAuthor() + " 地址："
  + status.getAddress() + " 电话：" + status.getTelephone() + " 邮箱：" + status.getEmail());
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  Application.mainFrame = new MainFrame("");
  }
  }