第一个实训项目（3）_exit.addactionlistener(new actionlistener() {-优快云博客

本文详细介绍了学生服务模块的设计与实现过程，包括学院、状态、学生和用户服务的接口及其实现类，以及学生记录的查询、删除等功能的具体实现。通过具体的代码示例，展示了如何在Java环境下构建学生信息管理系统的服务层。

和dao包一样
创建一个server包
在这里插入图片描述
CollegeService

StatusService

StudentService

UserService

在Service层新建了一个Impl包

CollegeServiceImpl
package net.hj.student.service.impl;

import net.hj.student.bean.College;
import net.hj.student.dao.CollegeDao;
import net.hj.student.dao.impl.CollegeDaoImpl;
import net.hj.student.service.CollegeService;

/**

功能：学校服务接口实现类
作者：何杰
日期：2019年7月1日
/
public class CollegeServiceImpl implements CollegeService {
/*
- 声明学校数据访问对象
  */
  private CollegeDao collegeDao = new CollegeDaoImpl();
@Override
public College findCollegeById(int id) {
return collegeDao.findById(id);
}

@Override
public int updateCollege(College college) {
return collegeDao.update(college);
}
}
StatusServiceImpl
package net.hj.student.service.impl;

import net.hj.student.bean.Status;
import net.hj.student.dao.StatusDao;
import net.hj.student.dao.impl.StatusDaoImpl;
import net.hj.student.service.StatusService;

/**

功能：状态服务接口实现类
作者：何杰
日期：2019年7月1日
/
public class StatusServiceImpl implements StatusService{
/*
- 声明状态数据访问对象
  */
  private StatusDao statusDao = new StatusDaoImpl();
@Override
public Status findStatusById(int id) {
return statusDao.findById(id);
}

@Override
public int updateStatus(Status status) {
return statusDao.update(status);
}
}
StudentServiceImpl
package net.hj.student.service.impl;

import net.hj.student.bean.Student;
import net.hj.student.dao.StudentDao;
import net.hj.student.dao.impl.StudentDaoImpl;
import net.hj.student.service.StudentService;

import java.util.List;
import java.util.Vector;

/**

功能：学生服务接口实现类
作者：何杰
日期：2019年7月1日
/
public class StudentServiceImpl implements StudentService {
/*
- 声明学生数据访问对象
  */
  private StudentDao studentDao = new StudentDaoImpl();
@Override
public int addStudent(Student student) {
return studentDao.insert(student);
}

@Override
public int deleteStudentById(String id) {
return studentDao.deleteById(id);
}

@Override
public int deleteStudentsByClass(String clazz) {
return studentDao.deleteByClass(clazz);
}

@Override
public int deleteStudentsByDepartment(String department) {
return studentDao.deleteByDepartment(department);
}

@Override
public List findAllStudents() {
return studentDao.findAll();
}

@Override
public Vector findRowsByClass() {
return studentDao.findRowsByClass();
}

@Override
public Vector findRowsByDepartment() {
return studentDao.findRowsByDepartment();
}

@Override
public Vector findRowsBySex() {
return studentDao.findRowsBySex();
}

@Override
public Student findStudentById(String id) {
return studentDao.findById(id);
}

@Override
public List findStudentsByClass(String clazz) {
return studentDao.findByClass(clazz);
}

@Override
public List findStudentsByDepartment(String department) {
return studentDao.findByDepartment(department);
}

@Override
public List findStudentsByName(String name) {
return studentDao.findByName(name);
}

@Override
public int updateStudent(Student student) {
return studentDao.update(student);
}
}
UserServiceImpl
package net.hj.student.service.impl;

import net.hj.student.bean.User;
import net.hj.student.dao.UserDao;
import net.hj.student.dao.impl.UserDaoImpl;
import net.hj.student.service.UserService;

import java.util.List;

/**

功能：用户服务接口实现类
作者：何杰
日期：2019年7月1日
/
public class UserServiceImpl implements UserService{
/*
- 声明用户数据访问对象
  */
  private UserDao userDao = new UserDaoImpl();
@Override
public int addUser(User user) {
return userDao.insert(user);
}

@Override
public int deleteUserById(int id) {
return userDao.deleteById(id);
}

@Override
public List findAllUsers() {
return userDao.findAll();
}

@Override
public User findUserById(int id) {
return userDao.findById(id);
}

@Override
public User login(String username, String password) {
return userDao.login(username, password);
}

@Override
public int updateUser(User user) {
return userDao.update(user);
}

@Override
public boolean isUsernameExisted(String username) {
return userDao.isUsernameExisted(username);
}

@Override
public String findPasswordByUsername(String username) {
return userDao.findPasswordByUsername(username);
}

@Override
public boolean isTelephoneExisted(String telephone) {
return userDao.isTelephoneExisted(telephone);
}
}

由于Service的测试和dao的测试一样
于是我取了个巧
将dao的测试直接复制复制了一份，并将里面引用的dao改成了Service，还有各种名字换成了dao的

在这里插入图片描述

然后接下来就是做功能模块
在这里插入图片描述
AddStudentFrame添加学生记录
package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.util.List;

/**

功能：添加学生记录
作者：何杰
日期：2019年7月2日
/
public class AddStudentFrame extends JFrame {
/*
- 声明面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  private JPanel pnlRow6;
  private JPanel pnlRow7;
  private JPanel pnlSouth;
  /*
- 声明标签
  /
  private JLabel lblId;
  private JLabel lblName;
  private JLabel lblSex;
  private JLabel lblAge;
  private JLabel lblDepartment;
  private JLabel lblClass;
  private JLabel lblTelephone;
  /*
- 声明文本框
  /
  private JTextField txtId;
  private JTextField txtName;
  private JTextField txtSex;
  private JTextField txtAge;
  private JTextField txtDepartment;
  private JTextField txtClass;
  private JTextField txtTelephone;
  /*
- 声明按钮
  /
  private JButton btnExit;
  private JButton btnOK;
  private JButton btnCancel;
  /*
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  */
  private List students;
/**
- 构造方法
- @param title
  */
  public AddStudentFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  pnlRow6 = new JPanel();
  pnlRow7 = new JPanel();
  
  pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  lblId = new JLabel(“学号：”);
  lblName = new JLabel(“姓名：”);
  lblSex = new JLabel(“性别：”);
  lblAge = new JLabel(“年龄：”);
  lblDepartment = new JLabel(“系部：”);
  lblClass = new JLabel(“班级：”);
  lblTelephone = new JLabel(“电话：”);
  
  txtId = new JTextField(20);
  txtName = new JTextField(20);
  txtSex = new JTextField(20);
  txtAge = new JTextField(20);
  txtDepartment = new JTextField(20);
  txtClass = new JTextField(20);
  txtTelephone = new JTextField(20);
  btnOK = new JButton(“确定[O]”);
  btnCancel = new JButton(“取消[C]”);
  btnExit = new JButton(“退出[X]”);
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.setLayout(new BorderLayout());
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlSouth, BorderLayout.SOUTH);
  pnlCenter.setLayout(new GridLayout(7, 1));
  pnlCenter.add(pnlRow1);
  pnlCenter.add(pnlRow2);
  pnlCenter.add(pnlRow3);
  pnlCenter.add(pnlRow4);
  pnlCenter.add(pnlRow5);
  pnlCenter.add(pnlRow6);
  pnlCenter.add(pnlRow7);
  
  pnlRow1.add(lblId);
  pnlRow1.add(txtId);
  pnlRow2.add(lblName);
  pnlRow2.add(txtName);
  pnlRow3.add(lblSex);
  pnlRow3.add(txtSex);
  pnlRow4.add(lblAge);
  pnlRow4.add(txtAge);
  pnlRow5.add(lblDepartment);
  pnlRow5.add(txtDepartment);
  pnlRow6.add(lblClass);
  pnlRow6.add(txtClass);
  pnlRow7.add(lblTelephone);
  pnlRow7.add(txtTelephone);
  
  pnlSouth.add(btnOK);
  pnlSouth.add(btnCancel);
  pnlSouth.add(btnExit);
  
  // 设置窗口属性
  setSize(500, 300);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“添加学生记录”);
  // 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);
  
  // 【确定】按钮单击事件
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 学号非空校验
  if (txtId.getText().trim().equals("")) {
  JOptionPane.showMessageDialog(null, “学号不能为空！”, “增加学生记录”, JOptionPane.WARNING_MESSAGE);
  txtId.requestFocus();
  return;
  }
```
     // 年龄数字校验
     if (!isNumber(txtAge.getText().trim())) {
         JOptionPane.showMessageDialog(null, "注意：年龄全由数字构成！", "增加学生记录", JOptionPane.WARNING_MESSAGE);
         txtAge.setText("");
         txtAge.requestFocus();
         return;
     }

     // 创建学生实体
     Student student = new Student();
     // 设置学生实体属性
     student.setId(txtId.getText().trim());
     student.setName(txtName.getText().trim());
     student.setSex(txtSex.getText().trim());
     student.setAge(Integer.parseInt(txtAge.getText()));
     student.setDepartment(txtDepartment.getText().trim());
     student.setClazz(txtClass.getText().trim());
     student.setTelephone(txtTelephone.getText().trim());

     // 创建学生服务对象
     StudentService studentService = new StudentServiceImpl();
     // 添加学生记录
     int count = studentService.addStudent(student);
     // 判断是否添加成功
     if (count > 0) {
         JOptionPane.showMessageDialog(null, "添加记录成功！", "增加学生记录", JOptionPane.INFORMATION_MESSAGE);
         txtId.setText("");
         txtName.setText("");
         txtSex.setText("");
         txtAge.setText("");
         txtDepartment.setText("");
         txtClass.setText("");
         txtTelephone.setText("");
         txtId.requestFocus();
     } else {
         JOptionPane.showMessageDialog(null, "添加记录失败！", "增加学生记录", JOptionPane.ERROR_MESSAGE);
     }
 }
```
  });
  
  // 【取消】按钮单击事件处理
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  txtId.setText("");
  txtName.setText("");
  txtSex.setText("");
  txtAge.setText("");
  txtDepartment.setText("");
  txtClass.setText("");
  txtTelephone.setText("");
  txtId.requestFocus();
  }
  });
  
  // 【退出】按钮单击事件处理
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  dispose();
  }
  });
  
  // 【学号】文本框按键事件处理
  txtId.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  if (!txtId.getText().trim().equals("")) {
  txtName.requestFocus();
  }
  }
  }
  });
  
  // 【姓名】文本框按键事件处理
  txtName.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtSex.requestFocus();
  }
  }
  });
  
  // 【性别】文本框按键事件处理
  txtSex.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtAge.requestFocus();
  }
  }
  });
  
  // 【年龄】文本框按键事件处理
  txtAge.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtDepartment.requestFocus();
  }
  }
  });
  
  // 【系部】文本框按键事件处理
  txtDepartment.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtClass.requestFocus();
  }
  }
  });
  
  // 【班级】文本框按键事件处理
  txtClass.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtTelephone.requestFocus();
  }
  }
  });
  }
/**
- 判断一个字符串是否全是数字
- @param str
- @return
  */
  boolean isNumber(String str) {
  for (int i = 0; i < str.length(); i++) {
  if (str.charAt(i) < ‘0’ || str.charAt(i) > ‘9’) {
  return false;
  }
  }
  return true;
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new AddStudentFrame("");
  }
  }

运行结果
在这里插入图片描述
浏览学生记录
package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.List;

/**

功能：浏览学生记录
作者：何杰
日期：2019年7月2日
/
public class BrowseStudentsFrame extends JFrame {
/*
- 声明面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  private JPanel pnlRow6;
  private JPanel pnlRow7;
  private JPanel pnlSouth;
  /*
- 声明标签
  /
  private JLabel lblId;
  private JLabel lblName;
  private JLabel lblSex;
  private JLabel lblAge;
  private JLabel lblDepartment;
  private JLabel lblClass;
  private JLabel lblTelephone;
  /*
- 声明文本框
  /
  private JTextField txtId;
  private JTextField txtName;
  private JTextField txtSex;
  private JTextField txtAge;
  private JTextField txtDepartment;
  private JTextField txtClass;
  private JTextField txtTelephone;
  /*
- 声明按钮
  */
  private JButton btnTop;
  private JButton btnPrevious;
  private JButton btnNext;
  private JButton btnBottom;
  private JButton btnExit;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  StudentService studentService;
/**
- 构造方法
- @param title
  */
  public BrowseStudentsFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  pnlRow6 = new JPanel();
  pnlRow7 = new JPanel();
  
  pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  lblId = new JLabel(“学号：”);
  lblName = new JLabel(“姓名：”);
  lblSex = new JLabel(“性别：”);
  lblAge = new JLabel(“年龄：”);
  lblDepartment = new JLabel(“系部：”);
  lblClass = new JLabel(“班级：”);
  lblTelephone = new JLabel(“电话：”);
  
  txtId = new JTextField(40);
  txtName = new JTextField(40);
  txtSex = new JTextField(40);
  txtAge = new JTextField(40);
  txtDepartment = new JTextField(40);
  txtClass = new JTextField(40);
  txtTelephone = new JTextField(40);
  txtId.setEditable(false);
  txtName.setEditable(false);
  txtSex.setEditable(false);
  txtAge.setEditable(false);
  txtDepartment.setEditable(false);
  txtClass.setEditable(false);
  txtTelephone.setEditable(false);
  
  btnTop = new JButton(“第一条[T]”);
  btnPrevious = new JButton(“上一条[P]”);
  btnNext = new JButton(“下一条[N]”);
  btnBottom = new JButton(“最后一条[B]”);
  btnExit = new JButton(“退出[X]”);
  btnTop.setMnemonic(KeyEvent.VK_T);
  btnPrevious.setMnemonic(KeyEvent.VK_P);
  btnNext.setMnemonic(KeyEvent.VK_N);
  btnBottom.setMnemonic(KeyEvent.VK_B);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.setLayout(new BorderLayout());
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlSouth, BorderLayout.SOUTH);
  pnlCenter.setLayout(new GridLayout(7, 1));
  
  pnlCenter.add(pnlRow1);
  pnlCenter.add(pnlRow2);
  pnlCenter.add(pnlRow3);
  pnlCenter.add(pnlRow4);
  pnlCenter.add(pnlRow5);
  pnlCenter.add(pnlRow6);
  pnlCenter.add(pnlRow7);
  
  pnlRow1.add(lblId);
  pnlRow1.add(txtId);
  pnlRow2.add(lblName);
  pnlRow2.add(txtName);
  pnlRow3.add(lblSex);
  pnlRow3.add(txtSex);
  pnlRow4.add(lblAge);
  pnlRow4.add(txtAge);
  pnlRow5.add(lblDepartment);
  pnlRow5.add(txtDepartment);
  pnlRow6.add(lblClass);
  pnlRow6.add(txtClass);
  pnlRow7.add(lblTelephone);
  pnlRow7.add(txtTelephone);
  
  pnlSouth.add(btnTop);
  pnlSouth.add(btnPrevious);
  pnlSouth.add(btnNext);
  pnlSouth.add(btnBottom);
  pnlSouth.add(btnExit);
  
  // 设置窗口属性
  setSize(500, 300);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 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);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 判断是否有学生记录
  if (students.size() > 0) {
  // 设置当前记录号
  currentRow = 1;
  // 设置窗口标题
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  // 填充窗口各文本框数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “表中没有记录！”, “浏览学生表记录”, JOptionPane.ERROR_MESSAGE);
  btnTop.setEnabled(false);
  btnPrevious.setEnabled(false);
  btnNext.setEnabled(false);
  btnBottom.setEnabled(false);
  }
  
  // 【第一条】按钮单击事件
  btnTop.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【上一条】按钮单击事件
  btnPrevious.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow > 1) {
  // 设置当前记录号
  currentRow–;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到第一条记录！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【下一条】按钮单击事件
  btnNext.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow < students.size() - 1) {
  // 设置当前记录号
  currentRow++;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到最后一条记录！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【最后一条】按钮单击事件
  btnBottom.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = students.size() - 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
```
 @Override
 public void actionPerformed(ActionEvent e) {
     dispose();
 }
```
  });
  }
/**
- 将当前记录数据填充窗口各文本框
- @param currentRow
  */
  private void fillFrameData(int currentRow) {
  if (currentRow > 0) {
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  txtId.setText(students.get(currentRow).getId());
  txtName.setText(students.get(currentRow).getName());
  txtSex.setText(students.get(currentRow).getSex());
  txtAge.setText(students.get(currentRow).getAge() + “”);
  txtDepartment.setText(students.get(currentRow).getDepartment());
  txtClass.setText(students.get(currentRow).getClazz());
  txtTelephone.setText(students.get(currentRow).getTelephone());
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new BrowseStudentsFrame("");
  }
  }

运行结果
在这里插入图片描述
修改用户密码
package net.hj.student.gui;

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

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

/**

功能：修改用户密码
作者：何杰
日期：2019年7月2日
/
public class ChangePasswordFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  /*
- 标签
  /
  private JLabel lblUsername;
  private JLabel lblPassword;
  private JLabel lblNewPassword1;
  private JLabel lblNewPassword2;
  /*
- 文本框
  /
  private JTextField txtUsername;
  private JPasswordField txtPassword;
  private JPasswordField txtNewPassword1;
  private JPasswordField txtNewPassword2;
  /*
- 按钮
  /
  private JButton btnOK;
  private JButton btnCancel;
  /*
- 用户服务对象
  */
  private UserService userService;
/**
- 构造方法
- @param title
  */
  public ChangePasswordFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件（面板与控件）
  panel = (JPanel) getContentPane();
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  
  lblUsername = new JLabel(“用户名：”);
  lblPassword = new JLabel(“旧密码：”);
  lblNewPassword1 = new JLabel(“新密码：”);
  lblNewPassword2 = new JLabel(“确认：”);
  
  txtUsername = new JTextField(20);
  txtUsername.setEditable(false);
  txtPassword = new JPasswordField(20);
  txtNewPassword1 = new JPasswordField(20);
  txtNewPassword2 = new JPasswordField(20);
  
  btnOK = new JButton(“确定[O]”);
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel = new JButton(“取消[C]”);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  
  // 设置大面板布局，添加五个小面板
  panel.setLayout(new GridLayout(5, 1));
  panel.add(pnlRow1);
  panel.add(pnlRow2);
  panel.add(pnlRow3);
  panel.add(pnlRow4);
  panel.add(pnlRow5);
  
  // 将控件添加到五个小面板
  pnlRow1.add(lblUsername);
  pnlRow1.add(txtUsername);
  pnlRow2.add(lblPassword);
  pnlRow2.add(txtPassword);
  pnlRow3.add(lblNewPassword1);
  pnlRow3.add(txtNewPassword1);
  pnlRow4.add(lblNewPassword2);
  pnlRow4.add(txtNewPassword2);
  pnlRow5.add(btnOK);
  pnlRow5.add(btnCancel);
  
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“修改用户密码”);
  // 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);
  
  // 设置控件属性
  txtUsername.setEditable(false);
  txtUsername.setText(Application.username);
  
  // 【取消】按钮单击事件处理
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  dispose();
  }
  });
  
  // 【确定】按钮单击事件处理
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  changePassword();
  }
  });
  
  // 【确定】按钮按键事件处理
  btnOK.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == 10) {
  changePassword();
  }
  }
  });
  
  // 【用户名】文本框按键事件处理
  txtUsername.addKeyListener(new KeyAdapter() {
  @Override
  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() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtNewPassword1.requestFocus();
  }
  }
  });
  
  // 【新密码1】文本框按键事件处理
  txtNewPassword1.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtNewPassword2.requestFocus();
  }
  }
  });
  
  // 【新密码2】文本框按键事件处理
  txtNewPassword2.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  btnOK.requestFocus();
  }
  }
  });
  }
/**
- 修改密码方法
  */
  private void changePassword() {
  // 获取用户信息
  int id = Application.id;
  String username = Application.username;
  
  // 保存用户输入的旧密码与两个新密码
  String password = new String(txtPassword.getPassword());
  String newPassword1 = new String(txtNewPassword1.getPassword());
  String newPassword2 = new String(txtNewPassword2.getPassword());
  
  // 创建学生服务对象
  userService = new UserServiceImpl();
  
  if (userService.login(username, password) == null) {
  JOptionPane.showMessageDialog(null, “旧密码错误，请重新输入！”, “错误提示”, JOptionPane.ERROR_MESSAGE);
  txtPassword.requestFocus();
  txtPassword.selectAll();
  } else if (newPassword1.equals("")) {
  JOptionPane.showMessageDialog(null, “新密码不能为空！”, “错误提示”, JOptionPane.ERROR_MESSAGE);
  txtNewPassword1.requestFocus();
  } else if (newPassword2.equals("")) {
  JOptionPane.showMessageDialog(null, “确认密码不能为空！”, “错误提示”, JOptionPane.ERROR_MESSAGE);
  txtNewPassword2.requestFocus();
  } else if (!newPassword1.equals(newPassword2)) {
  JOptionPane.showMessageDialog(null, “两次密码不一致，请重新输入！”, “错误提示”, JOptionPane.ERROR_MESSAGE);
  txtNewPassword1.setText("");
  txtNewPassword2.setText("");
  txtNewPassword1.requestFocus();
  } else {
  // 按标识符获取用户
  User user = userService.findUserById(id);
  // 修改用户的密码属性
  user.setPassword(newPassword1);
  // 调用用户服务对象的更新方法，更新用户信息
  int count = userService.updateUser(user);
  if (count > 0) {
  JOptionPane.showMessageDialog(null, “密码修改成功！”, “设置密码”, JOptionPane.INFORMATION_MESSAGE);
  dispose();
  } else {
  JOptionPane.showMessageDialog(null, “密码修改失败！”, “设置密码”, JOptionPane.WARNING_MESSAGE);
  }
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  Application.id = 1;
  Application.username = “郑志强”;
  new ChangePasswordFrame("");
  }
  }

运行结果
在这里插入图片描述
按班级统计学生人数
package net.hj.student.gui;

import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.print.PrinterException;
import java.util.Vector;

/**

功能：按班级统计学生人数
作者：何杰
日期：2019年7月2日
/
public class CountStudentsByClassFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  /*
- 按钮
  /
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
public CountStudentsByClassFrame(String title) {
super(title);
initGUI();
}

/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_P);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  TitledBorder tb = new TitledBorder(“统计结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取按班级统计结果记录行集
  rows = studentService.findRowsByClass();
  // 设置表头
  colHead.add(“班级”);
  colHead.add(“人数”);
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  repaint(); // 重绘窗体
  
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  }
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按班级统计学生人数”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new CountStudentsByClassFrame("");
  }
  }
  运行结果
  
  按系部统计学生人数
  package net.hj.student.gui;

import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

/**

功能：按系部统计学生人数
作者：何杰
日期：2019年7月2日
/
public class CountStudentsByDepartmentFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  /*
- 按钮
  /
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
public CountStudentsByDepartmentFrame(String title) {
super(title);
initGUI();
}

/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_P);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  TitledBorder tb = new TitledBorder(“统计结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取按系部统计结果记录行集
  rows = studentService.findRowsByDepartment();
  // 设置表头
  colHead.add(“系部”);
  colHead.add(“人数”);
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  repaint(); // 重绘窗体
  
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  }
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按系部统计学生人数”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new CountStudentsByDepartmentFrame("");
  }
  }
  运行结果
  
  按性别统计学生人数
  package net.hj.student.gui;

import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

/**

功能：按性别统计学生人数
作者：何杰
日期：2019年7月2日
/
public class CountStudentsBySexFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  /*
- 按钮
  /
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
public CountStudentsBySexFrame(String title) {
super(title);
initGUI();
}

/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_P);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  TitledBorder tb = new TitledBorder(“统计结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取按性别统计结果记录行集
  rows = studentService.findRowsBySex();
  // 设置表头
  colHead.add(“性别”);
  colHead.add(“人数”);
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  repaint(); // 重绘窗体
  
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  }
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按性别统计学生人数”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new CountStudentsBySexFrame("");
  }
  }
  运行结果
  
  按学号删除学生记录
  package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.util.Vector;
import java.util.List;

/**

功能：按学号删除学生记录
作者：何杰

日期：2019年7月2日
/
public class DeleteStudentByIdFrame extends JFrame {
/*

学号标签
/
private JLabel lblInputId;
/*
学号文本框
/
private JTextField txtId;
/*
面板
*/
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;

/**

按钮
/
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnDelete;
private JButton btnExit;
/*
记录行集
/
private Vector rows;
/*
表格列标题
/
private Vector colHead;
/*
表格
/
private JTable table;
/*
滚动面板
/
private JScrollPane scroller;
/*
当前记录行号
/
private int currentRow;
/*
学生列表
/
private List students;
/*
创建学生服务对象
*/
private StudentService studentService;

/**

构造方法
@param title
*/
public DeleteStudentByIdFrame(String title) {
super(title);
intiGUI();
}

private void intiGUI() {
// 创建组件
panel = (JPanel) getContentPane();
pnlNorth = new JPanel();
pnlCenter = new JPanel();
pnlSouth = new JPanel();

 rows = new Vector();
 colHead = new Vector();

 lblInputId = new JLabel("输入学号：");
 txtId = new JTextField(10);
 txtId.setHorizontalAlignment(JTextField.CENTER);
 btnQuery = new JButton("查询[Q]");
 btnQuery.setMnemonic(KeyEvent.VK_Q);
 btnBrowseAll = new JButton("显示全部记录[A]");
 btnBrowseAll.setMnemonic(KeyEvent.VK_A);
 btnDelete = new JButton("删除查询的记录[D]");
 btnDelete.setEnabled(false);// 删除按钮不可用
 btnDelete.setMnemonic(KeyEvent.VK_D);
 btnExit = new JButton("退出[X]");
 btnExit.setMnemonic(KeyEvent.VK_X);

 // 添加组件
 panel.add(pnlSouth, BorderLayout.SOUTH);
 panel.add(pnlCenter, BorderLayout.CENTER);
 panel.add(pnlNorth, BorderLayout.NORTH);

 pnlNorth.add(lblInputId);
 pnlNorth.add(txtId);
 pnlNorth.add(btnQuery);
 pnlNorth.add(btnBrowseAll);
 pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
 pnlSouth.add(btnDelete);
 pnlSouth.add(btnExit);
 pnlCenter.setLayout(new BorderLayout());

 // 创建标题边框对象
 TitledBorder tb = new TitledBorder("查询结果");
 pnlCenter.setBorder(tb);

 // 创建学生服务对象
 studentService = new StudentServiceImpl();
 // 获取全部学生列表
 students = studentService.findAllStudents();
 // 填充表格数据
 fillTableData();

 // 设置窗口大小
 setSize(600, 350);
 // 设置窗口不可调整大小
 setResizable(false);
 // 设置窗口屏幕居中
 setLocationRelativeTo(null);
 // 设置窗口标题
 setTitle("按学号删除学生记录");
 // 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);

 // 【退出】按钮单击事件
 btnExit.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         dispose();
     }
 });

 // 【删除】按钮单击事件
 btnDelete.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (!rows.isEmpty()) {
             long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录？");
             if (choice == JOptionPane.OK_OPTION) {
                 // 获取待删学生学号
                 String id = txtId.getText().trim();
                 // 按学号删除学生
                 int count = studentService.deleteStudentById(id);
                 if (count > 0) {
                     JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                     // 重新获取全部学生列表
                     students = studentService.findAllStudents();
                     // 清空待删学生学号文本框
                     txtId.setText("");
                     // 填充数据
                     fillTableData();
                     // 删除按钮不可用
                     btnDelete.setEnabled(false);
                 } else {
                     JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                 }
             }
         }
     }
 });

 // 【查询】按钮单击事件
 btnQuery.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         doQuery();
     }
 });

 // 【显示全部记录】按钮单击事件
 btnBrowseAll.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         // 获取全部学生记录
         students = studentService.findAllStudents();
         // 填充表格数据
         fillTableData();
         // 删除按钮不可用
         btnDelete.setEnabled(false);
     }
 });

 // 【学号】文本框按键事件
 txtId.addKeyListener(new KeyAdapter() {
     @Override
     public void keyPressed(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             doQuery();
         }
     }
 });

 // 表格单击事件
 table.addMouseListener(new MouseAdapter() {
     public void mouseClicked(MouseEvent e) {
         // 获取当前行的行数
         int row = table.rowAtPoint(e.getPoint());
         // 选中鼠标单击的行
         table.setRowSelectionInterval(row, row);
         // 设置文本框内容
         txtId.setText(table.getValueAt(row, 0).toString());
     }
 });

}

/**

查询方法
*/
private void doQuery() {
// 获取查询学号
String id = txtId.getText().trim();
if (!id.equals("")) {
students.clear();
Student student = studentService.findStudentById(id);
if (student != null) {
// 将查询到的学生添加到列表
students.add(student);
// 让删除按钮可用
btnDelete.setEnabled(true);
}
// 填充表格
fillTableData();
} else {
JOptionPane.showMessageDialog(this, “请输入待查学生学号！”, “警告”, JOptionPane.WARNING_MESSAGE);
txtId.requestFocus();
}
}

/**

填充表格方法
*/
private void fillTableData() {
// 填充表头
colHead.clear();
colHead.add(“学号”);
colHead.add(“姓名”);
colHead.add(“性别”);
colHead.add(“年龄”);
colHead.add(“系部”);
colHead.add(“班级”);
colHead.add(“电话”);

// 填充表记录
rows.clear();
for (Student student : students) {
Vector currentRow = new Vector();
currentRow.addElement(student.getId());
currentRow.addElement(student.getName());
currentRow.addElement(student.getSex());
currentRow.addElement(student.getAge() + “”);
currentRow.addElement(student.getDepartment());
currentRow.addElement(student.getClazz());
currentRow.addElement(student.getTelephone());
// 将当前行添加到记录行集
rows.add(currentRow);
}

// 创建表格（参数1：记录集；参数2：表头）
table = new JTable(rows, colHead);

// 定义滚动面板
scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// 将滚动面板添加到中心面板
pnlCenter.add(scroller, BorderLayout.CENTER);

// 重绘窗体
repaint();

// 判断是否有记录行
if (rows.isEmpty()) {
JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
txtId.setText("");
} else {
// 让滚动条移到最上方
scroller.getVerticalScrollBar().setValue(0);
}
}

/**

主方法
@param args
*/
public static void main(String[] args) {
new DeleteStudentByIdFrame("");
}
}
运行结果

按班级删除学生记录
package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.util.Vector;
import java.util.List;

/**

功能：按班级删除学生记录
作者：何杰

日期：2019年7月2日
/
public class DeleteStudentsByClassFrame extends JFrame {
/*

班级标签
/
private JLabel lblInputClass;
/*
班级文本框
/
private JTextField txtClass;
/*
面板
/
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;
/*
按钮
/
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnDelete;
private JButton btnExit;
/*
记录行集
/
private Vector rows;
/*
表格列标题
/
private Vector colHead;
/*
表格
/
private JTable table;
/*
滚动面板
*/
private JScrollPane scroller;

/**

当前记录行号
/
private int currentRow;
/*
学生列表
/
private List students;
/*
创建学生服务对象
*/
private StudentService studentService;

/**

构造方法
@param title
*/
public DeleteStudentsByClassFrame(String title) {
super(title);
intiGUI();
}

private void intiGUI() {
// 创建组件
panel = (JPanel) getContentPane();
pnlNorth = new JPanel();
pnlCenter = new JPanel();
pnlSouth = new JPanel();

 rows = new Vector();
 colHead = new Vector();

 lblInputClass = new JLabel("输入班级：");
 txtClass = new JTextField(10);
 txtClass.setHorizontalAlignment(JTextField.CENTER);
 btnQuery = new JButton("查询[Q]");
 btnQuery.setMnemonic(KeyEvent.VK_Q);
 btnBrowseAll = new JButton("显示全部记录[A]");
 btnBrowseAll.setMnemonic(KeyEvent.VK_A);
 btnDelete = new JButton("删除查询的记录[D]");
 btnDelete.setEnabled(false);// 删除按钮不可用
 btnDelete.setMnemonic(KeyEvent.VK_D);
 btnExit = new JButton("退出[X]");
 btnExit.setMnemonic(KeyEvent.VK_X);

 // 添加组件
 panel.add(pnlSouth, BorderLayout.SOUTH);
 panel.add(pnlCenter, BorderLayout.CENTER);
 panel.add(pnlNorth, BorderLayout.NORTH);

 pnlNorth.add(lblInputClass);
 pnlNorth.add(txtClass);
 pnlNorth.add(btnQuery);
 pnlNorth.add(btnBrowseAll);
 pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
 pnlSouth.add(btnDelete);
 pnlSouth.add(btnExit);
 pnlCenter.setLayout(new BorderLayout());

 // 创建标题边框对象
 TitledBorder tb = new TitledBorder("查询结果");
 pnlCenter.setBorder(tb);

 // 创建学生服务对象
 studentService = new StudentServiceImpl();
 // 获取全部学生列表
 students = studentService.findAllStudents();
 // 填充表格数据
 fillTableData();

 // 设置窗口大小
 setSize(600, 350);
 // 设置窗口不可调整大小
 setResizable(false);
 // 设置窗口屏幕居中
 setLocationRelativeTo(null);
 // 设置窗口标题
 setTitle("按班级删除学生记录");
 // 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);


 // 【退出】按钮单击事件
 btnExit.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         dispose();
     }
 });

 // 【删除】按钮单击事件
 btnDelete.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (!rows.isEmpty()) {
             long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录？");
             if (choice == JOptionPane.OK_OPTION) {
                 // 获取待删班级
                 String clazz = txtClass.getText().trim();
                 // 按班级删除学生
                 int count = studentService.deleteStudentsByClass(clazz);
                 if (count > 0) {
                     JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                     // 重新获取全部学生列表
                     students = studentService.findAllStudents();
                     // 清空待删班级文本框
                     txtClass.setText("");
                     // 填充数据
                     fillTableData();
                     // 删除按钮不可用
                     btnDelete.setEnabled(false);
                 } else {
                     JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                 }
             }
         }
     }
 });

 // 【查询】按钮单击事件
 btnQuery.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         doQuery();
     }
 });

 // 【显示全部记录】按钮单击事件
 btnBrowseAll.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         // 获取全部学生记录
         students = studentService.findAllStudents();
         // 填充表格数据
         fillTableData();
         // 删除按钮不可用
         btnDelete.setEnabled(false);
     }
 });

 // 【班级】文本框按键事件
 txtClass.addKeyListener(new KeyAdapter() {
     @Override
     public void keyPressed(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             doQuery();
         }
     }
 });

 // 表格单击事件
 table.addMouseListener(new MouseAdapter() {
     public void mouseClicked(MouseEvent e) {
         // 获取当前行的行数
         int row = table.rowAtPoint(e.getPoint());
         if (row <= table.getRowCount()) {
             // 选中鼠标单击的行
             table.setRowSelectionInterval(row, row);
             // 设置文本框内容
             txtClass.setText(table.getValueAt(row, 5).toString());
         }
     }
 });

}

/**

查询方法
*/
private void doQuery() {
// 获取查询班级
String clazz = txtClass.getText().trim();
if (!clazz.equals("")) {
students = studentService.findStudentsByClass(clazz);
if (students.size() > 0) {
// 让删除按钮可用
btnDelete.setEnabled(true);
}
// 填充表格
fillTableData();
} else {
JOptionPane.showMessageDialog(this, “请输入待查班级！”, “警告”, JOptionPane.WARNING_MESSAGE);
txtClass.requestFocus();
}
}

/**

填充表格方法
*/
private void fillTableData() {
// 填充表头
colHead.clear();
colHead.add(“学号”);
colHead.add(“姓名”);
colHead.add(“性别”);
colHead.add(“年龄”);
colHead.add(“系部”);
colHead.add(“班级”);
colHead.add(“电话”);

// 填充表记录
rows.clear();
for (Student student : students) {
Vector currentRow = new Vector();
currentRow.addElement(student.getId());
currentRow.addElement(student.getName());
currentRow.addElement(student.getSex());
currentRow.addElement(student.getAge() + “”);
currentRow.addElement(student.getDepartment());
currentRow.addElement(student.getClazz());
currentRow.addElement(student.getTelephone());
// 将当前行添加到记录行集
rows.add(currentRow);
}

// 创建表格（参数1：记录集；参数2：表头）
table = new JTable(rows, colHead);

// 定义滚动面板
scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// 将滚动面板添加到中心面板
pnlCenter.add(scroller, BorderLayout.CENTER);

// 重绘窗体
repaint();

// 判断是否有记录行
if (rows.isEmpty()) {
JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
txtClass.setText("");
} else {
// 让滚动条移到最上方
scroller.getVerticalScrollBar().setValue(0);
}
}

/**

主方法
@param args
*/
public static void main(String[] args) {
new DeleteStudentsByClassFrame("");
}
}
运行结果

按系部删除学生记录
package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.util.Vector;
import java.util.List;

/**

功能：按系部删除学生记录
作者：何杰

日期：2019年7月2日
/
public class DeleteStudentsByDepartmentFrame extends JFrame {
/*

系部标签
/
private JLabel lblInputDepartment;
/*
系部文本框
/
private JTextField txtDepartment;
/*
面板
/
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;
/*
按钮
/
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnDelete;
private JButton btnExit;
/*
记录行集
/
private Vector rows;
/*
表格列标题
/
private Vector colHead;
/*
表格
/
private JTable table;
/*
滚动面板
*/
private JScrollPane scroller;

/**

当前记录行号
/
private int currentRow;
/*
学生列表
/
private List students;
/*
创建学生服务对象
*/
private StudentService studentService;

/**

构造方法
@param title
*/
public DeleteStudentsByDepartmentFrame(String title) {
super(title);
intiGUI();
}

private void intiGUI() {
// 创建组件
panel = (JPanel) getContentPane();
pnlNorth = new JPanel();
pnlCenter = new JPanel();
pnlSouth = new JPanel();

 rows = new Vector();
 colHead = new Vector();

 lblInputDepartment = new JLabel("输入系部：");
 txtDepartment = new JTextField(10);
 txtDepartment.setHorizontalAlignment(JTextField.CENTER);
 btnQuery = new JButton("查询[Q]");
 btnQuery.setMnemonic(KeyEvent.VK_Q);
 btnBrowseAll = new JButton("显示全部记录[A]");
 btnBrowseAll.setMnemonic(KeyEvent.VK_A);
 btnDelete = new JButton("删除查询的记录[D]");
 btnDelete.setEnabled(false);// 删除按钮不可用
 btnDelete.setMnemonic(KeyEvent.VK_D);
 btnExit = new JButton("退出[X]");
 btnExit.setMnemonic(KeyEvent.VK_X);

 // 添加组件
 panel.add(pnlSouth, BorderLayout.SOUTH);
 panel.add(pnlCenter, BorderLayout.CENTER);
 panel.add(pnlNorth, BorderLayout.NORTH);

 pnlNorth.add(lblInputDepartment);
 pnlNorth.add(txtDepartment);
 pnlNorth.add(btnQuery);
 pnlNorth.add(btnBrowseAll);
 pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
 pnlSouth.add(btnDelete);
 pnlSouth.add(btnExit);
 pnlCenter.setLayout(new BorderLayout());

 // 创建标题边框对象
 TitledBorder tb = new TitledBorder("查询结果");
 pnlCenter.setBorder(tb);

 // 创建学生服务对象
 studentService = new StudentServiceImpl();
 // 获取全部学生列表
 students = studentService.findAllStudents();
 // 填充表格数据
 fillTableData();

 // 设置窗口大小
 setSize(600, 350);
 // 设置窗口不可调整大小
 setResizable(false);
 // 设置窗口屏幕居中
 setLocationRelativeTo(null);
 // 设置窗口标题
 setTitle("按系部删除学生记录");
 // 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);


 // 【退出】按钮单击事件
 btnExit.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         dispose();
     }
 });

 // 【删除】按钮单击事件
 btnDelete.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (!rows.isEmpty()) {
             long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录？");
             if (choice == JOptionPane.OK_OPTION) {
                 // 获取待删系部
                 String department = txtDepartment.getText().trim();
                 // 按系部删除学生
                 int count = studentService.deleteStudentsByDepartment(department);
                 if (count > 0) {
                     JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                     // 重新获取全部学生列表
                     students = studentService.findAllStudents();
                     // 清空待删班级文本框
                     txtDepartment.setText("");
                     // 填充数据
                     fillTableData();
                     // 删除按钮不可用
                     btnDelete.setEnabled(false);
                 } else {
                     JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                 }
             }
         }
     }
 });

 // 【查询】按钮单击事件
 btnQuery.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         doQuery();
     }
 });

 // 【显示全部记录】按钮单击事件
 btnBrowseAll.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         // 获取全部学生记录
         students = studentService.findAllStudents();
         // 填充表格数据
         fillTableData();
         // 删除按钮不可用
         btnDelete.setEnabled(false);
     }
 });

 // 【系部】文本框按键事件
 txtDepartment.addKeyListener(new KeyAdapter() {
     @Override
     public void keyPressed(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             doQuery();
         }
     }
 });

 // 表格单击事件
 table.addMouseListener(new MouseAdapter() {
     public void mouseClicked(MouseEvent e) {
         // 获取当前行的行数
         int row = table.rowAtPoint(e.getPoint());
         // 选中鼠标单击的行
         table.setRowSelectionInterval(row, row);
         // 设置文本框内容
         txtDepartment.setText(table.getValueAt(row, 4).toString());
     }
 });

}

/**

查询方法
*/
private void doQuery() {
// 获取查询系部
String department = txtDepartment.getText().trim();
if (!department.equals("")) {
students = studentService.findStudentsByDepartment(department);
if (students.size() > 0) {
// 让删除按钮可用
btnDelete.setEnabled(true);
}
// 填充表格
fillTableData();
} else {
JOptionPane.showMessageDialog(this, “请输入待查系部！”, “警告”, JOptionPane.WARNING_MESSAGE);
txtDepartment.requestFocus();
}
}

/**

填充表格方法
*/
private void fillTableData() {
// 填充表头
colHead.clear();
colHead.add(“学号”);
colHead.add(“姓名”);
colHead.add(“性别”);
colHead.add(“年龄”);
colHead.add(“系部”);
colHead.add(“班级”);
colHead.add(“电话”);

// 填充表记录
rows.clear();
for (Student student : students) {
Vector currentRow = new Vector();
currentRow.addElement(student.getId());
currentRow.addElement(student.getName());
currentRow.addElement(student.getSex());
currentRow.addElement(student.getAge() + “”);
currentRow.addElement(student.getDepartment());
currentRow.addElement(student.getClazz());
currentRow.addElement(student.getTelephone());
// 将当前行添加到记录行集
rows.add(currentRow);
}

// 创建表格（参数1：记录集；参数2：表头）
table = new JTable(rows, colHead);

// 定义滚动面板
scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// 将滚动面板添加到中心面板
pnlCenter.add(scroller, BorderLayout.CENTER);

// 重绘窗体
repaint();

// 判断是否有记录行
if (rows.isEmpty()) {
JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
txtDepartment.setText("");
} else {
// 让滚动条移到最上方
scroller.getVerticalScrollBar().setValue(0);
}
}

/**

主方法
@param args
*/
public static void main(String[] args) {
new DeleteStudentsByDepartmentFrame("");
}
}
运行结果

编辑学生记录
package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

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;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.List;

/**

功能：编辑学生记录
作者：何杰
日期：2019年7月2日
/
public class EditStudentFrame extends JFrame {
/*
- 声明面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  private JPanel pnlRow6;
  private JPanel pnlRow7;
  private JPanel pnlSouth;
  private JPanel pnlSouth1;
  private JPanel pnlSouth2;
  /*
- 声明标签
  /
  private JLabel lblId;
  private JLabel lblName;
  private JLabel lblSex;
  private JLabel lblAge;
  private JLabel lblDepartment;
  private JLabel lblClass;
  private JLabel lblTelephone;
  /*
- 声明文本框
  /
  private JTextField txtId;
  private JTextField txtName;
  private JTextField txtSex;
  private JTextField txtAge;
  private JTextField txtDepartment;
  private JTextField txtClass;
  private JTextField txtTelephone;
  /*
- 声明按钮
  /
  private JButton btnTop;
  private JButton btnPrevious;
  private JButton btnNext;
  private JButton btnBottom;
  private JButton btnExit;
  private JButton btnEdit;
  private JButton btnOK;
  private JButton btnCancel;
  /*
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  StudentService studentService;
/**
- 构造方法
- @param title
  */
  public EditStudentFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  pnlSouth.setLayout(new GridLayout(2, 1));
  
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  pnlRow6 = new JPanel();
  pnlRow7 = new JPanel();
  pnlSouth1 = new JPanel();
  pnlSouth2 = new JPanel();
  
  pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  lblId = new JLabel(“学号：”);
  lblName = new JLabel(“姓名：”);
  lblSex = new JLabel(“性别：”);
  lblAge = new JLabel(“年龄：”);
  lblDepartment = new JLabel(“系部：”);
  lblClass = new JLabel(“班级：”);
  lblTelephone = new JLabel(“电话：”);
  
  txtId = new JTextField(40);
  txtName = new JTextField(40);
  txtSex = new JTextField(40);
  txtAge = new JTextField(40);
  txtDepartment = new JTextField(40);
  txtClass = new JTextField(40);
  txtTelephone = new JTextField(40);
  txtId.setEditable(false);
  txtName.setEditable(false);
  txtSex.setEditable(false);
  txtAge.setEditable(false);
  txtDepartment.setEditable(false);
  txtClass.setEditable(false);
  txtTelephone.setEditable(false);
  
  btnTop = new JButton(“第一条[T]”);
  btnPrevious = new JButton(“上一条[P]”);
  btnNext = new JButton(“下一条[N]”);
  btnBottom = new JButton(“最后一条[B]”);
  btnExit = new JButton(“退出[X]”);
  btnEdit = new JButton(“编辑[E]”);
  btnOK = new JButton(“确定[O]”);
  btnCancel = new JButton(“取消[C]”);
  btnOK.setEnabled(false);
  btnCancel.setEnabled(false);
  btnTop.setMnemonic(KeyEvent.VK_T);
  btnPrevious.setMnemonic(KeyEvent.VK_P);
  btnNext.setMnemonic(KeyEvent.VK_N);
  btnBottom.setMnemonic(KeyEvent.VK_B);
  btnExit.setMnemonic(KeyEvent.VK_X);
  btnEdit.setMnemonic(KeyEvent.VK_E);
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  
  // 添加组件
  panel.setLayout(new BorderLayout());
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlSouth, BorderLayout.SOUTH);
  pnlCenter.setLayout(new GridLayout(7, 1));
  
  pnlCenter.add(pnlRow1);
  pnlCenter.add(pnlRow2);
  pnlCenter.add(pnlRow3);
  pnlCenter.add(pnlRow4);
  pnlCenter.add(pnlRow5);
  pnlCenter.add(pnlRow6);
  pnlCenter.add(pnlRow7);
  
  pnlRow1.add(lblId);
  pnlRow1.add(txtId);
  pnlRow2.add(lblName);
  pnlRow2.add(txtName);
  pnlRow3.add(lblSex);
  pnlRow3.add(txtSex);
  pnlRow4.add(lblAge);
  pnlRow4.add(txtAge);
  pnlRow5.add(lblDepartment);
  pnlRow5.add(txtDepartment);
  pnlRow6.add(lblClass);
  pnlRow6.add(txtClass);
  pnlRow7.add(lblTelephone);
  pnlRow7.add(txtTelephone);
  
  pnlSouth.add(pnlSouth1);
  pnlSouth.add(pnlSouth2);
  pnlSouth1.add(btnTop);
  pnlSouth1.add(btnPrevious);
  pnlSouth1.add(btnNext);
  pnlSouth1.add(btnBottom);
  pnlSouth1.add(btnExit);
  pnlSouth2.add(btnEdit);
  pnlSouth2.add(btnOK);
  pnlSouth2.add(btnCancel);
  
  // 设置窗口属性
  setSize(500, 300);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 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);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 判断是否有学生记录
  if (students.size() > 0) {
  // 设置当前记录号
  currentRow = 1;
  // 设置窗口标题
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  // 填充窗口各文本框数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “表中没有记录！”, “浏览学生表记录”, JOptionPane.ERROR_MESSAGE);
  btnTop.setEnabled(false);
  btnPrevious.setEnabled(false);
  btnNext.setEnabled(false);
  btnBottom.setEnabled(false);
  }
  
  // 【第一条】按钮单击事件
  btnTop.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【上一条】按钮单击事件
  btnPrevious.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow > 1) {
  // 设置当前记录号
  currentRow–;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到第一条记录！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【下一条】按钮单击事件
  btnNext.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow < students.size() - 1) {
  // 设置当前记录号
  currentRow++;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到最后一条记录！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【最后一条】按钮单击事件
  btnBottom.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = students.size() - 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  dispose();
  }
  });
  
  // 【编辑】按钮单击事件
  btnEdit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置窗口标题
  setTitle(“编辑学生表记录” + " && 当前记录：" + currentRow);
```
     txtName.setEditable(true);
     txtSex.setEditable(true);
     txtAge.setEditable(true);
     txtDepartment.setEditable(true);
     txtClass.setEditable(true);
     txtTelephone.setEditable(true);
     btnOK.setEnabled(true);
     btnCancel.setEnabled(true);
 }
```
  });
  
  // 【确定】按钮单击事件
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 获取当前学生实体
  Student student = students.get(currentRow);
```
     if (isNumber(txtAge.getText())) {
         if (isLegalTelephone(txtTelephone.getText())) {
             // 修改学生实体属性
             student.setName(txtName.getText());
             student.setSex(txtSex.getText());
             student.setAge(Integer.parseInt(txtAge.getText()));
             student.setDepartment(txtDepartment.getText());
             student.setClazz(txtClass.getText());
             student.setTelephone(txtTelephone.getText());
             // 更新学生信息
             int count = studentService.updateStudent(student);
             // 判断是否更新成功
             if (count > 0) {
                 JOptionPane.showMessageDialog(null, "更新记录成功！", "编辑学生记录", JOptionPane.INFORMATION_MESSAGE);
                 btnOK.setEnabled(false);
                 btnCancel.setEnabled(false);
                 btnEdit.setEnabled(true);
                 txtName.setEditable(false);
                 txtSex.setEditable(false);
                 txtAge.setEditable(false);
                 txtDepartment.setEditable(false);
                 txtClass.setEditable(false);
                 txtTelephone.setEditable(false);
                 // 重新获取全部学生列表
                 students = studentService.findAllStudents();
                 // 设置窗口标题
                 setTitle("浏览学生表记录" + " && 当前记录：" + currentRow);
             } else {
                 JOptionPane.showMessageDialog(null, "更新记录失败！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
             }
         } else {
             JOptionPane.showMessageDialog(null, "非法手机号！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
             txtTelephone.selectAll();
             txtTelephone.requestFocus();
         }
     } else {
         JOptionPane.showMessageDialog(null, "年龄必须是数字！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
         txtAge.selectAll();
         txtAge.requestFocus();
     }
 }
```
  });
  
  // 【取消】按钮单击事件
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  btnOK.setEnabled(false);
  btnCancel.setEnabled(false);
  btnEdit.setEnabled(true);
  txtName.setEditable(false);
  txtSex.setEditable(false);
  txtAge.setEditable(false);
  txtDepartment.setEditable(false);
  txtClass.setEditable(false);
  txtTelephone.setEditable(false);
  // 恢复文本框修改前的值
  txtName.setText(students.get(currentRow).getName());
  txtSex.setText(students.get(currentRow).getSex());
  txtAge.setText(students.get(currentRow).getAge() + “”);
  txtDepartment.setText(students.get(currentRow).getDepartment());
  txtClass.setText(students.get(currentRow).getClazz());
  txtTelephone.setText(students.get(currentRow).getTelephone());
  }
  });
  
  // 【学号】文本框按键事件
  txtId.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtName.requestFocus();
  }
  }
  });
  
  // 【姓名】文本框按键事件
  txtName.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtSex.requestFocus();
  }
  }
  });
  
  // 【性别】文本框按键事件
  txtSex.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtAge.requestFocus();
  }
  }
  });
  
  // 【年龄】文本框按键事件
  txtAge.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtDepartment.requestFocus();
  }
  }
  });
  
  // 【系部】文本框按键事件
  txtDepartment.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtClass.requestFocus();
  }
  }
  });
  
  // 【班级】文本框按键事件
  txtClass.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtTelephone.requestFocus();
  }
  }
  });
  }
/**
- 将当前记录数据填充窗口各文本框
- @param currentRow
  */
  private void fillFrameData(int currentRow) {
  if (currentRow > 0) {
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  txtId.setText(students.get(currentRow).getId());
  txtName.setText(students.get(currentRow).getName());
  txtSex.setText(students.get(currentRow).getSex());
  txtAge.setText(students.get(currentRow).getAge() + “”);
  txtDepartment.setText(students.get(currentRow).getDepartment());
  txtClass.setText(students.get(currentRow).getClazz());
  txtTelephone.setText(students.get(currentRow).getTelephone());
  }
  }
// 判断一个字符串是否全是数字
private boolean isNumber(String str) {
for (int i = 0; i < str.length(); i++) {
if (str.charAt(i) < ‘0’ || str.charAt(i) > ‘9’) {
return false;
}
}
return true;
}

/**
- 判断是否合法手机号
- @param telephone
- @return
  */
  private boolean isLegalTelephone(String telephone) {
  Pattern p = Pattern.compile("^{((13[0-9])|(15[}4,\D])|(18[0-9]))\d{8}$");
  Matcher m = p.matcher(telephone);
  return m.matches();
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new EditStudentFrame("");
  }
  }

运行结果
在这里插入图片描述
按学号查询学生记录
package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**

功能：按学号查询学生记录
作者：何杰
日期：2019年7月2日
/
public class FindStudentByIdFrame extends JFrame {
/*
- 学号标签
  /
  private JLabel lblInputId;
  /*
- 学号文本框
  /
  private JTextField txtId;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
  /*
- 按钮
  /
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentByIdFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputId = new JLabel(“输入学号：”);
  txtId = new JTextField(10);
  txtId.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputId);
  pnlNorth.add(txtId);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按学号查询学生记录”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  // 删除按钮不可用
  btnPrint.setEnabled(false);
  }
  });
  
  // 【学号】文本框按键事件
  txtId.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtId.setText(table.getValueAt(row, 0).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询学号
  String id = txtId.getText().trim();
  if (!id.equals("")) {
  students.clear();
  Student student = studentService.findStudentById(id);
  if (student != null) {
  // 将查询到的学生添加到列表
  students.add(student);
  }
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查学生学号！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtId.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“学号”);
  colHead.add(“姓名”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“班级”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtId.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentByIdFrame("");
  }
  }
  运行结果
  
  按班级查询学生记录
  package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**

功能：按班级查询学生记录
作者：何杰
日期：2019年7月2日
/
public class FindStudentsByClassFrame extends JFrame {
/*
- 班级标签
  /
  private JLabel lblInputClass;
  /*
- 班级文本框
  /
  private JTextField txtClass;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
  /*
- 按钮
  /
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  */
  private JScrollPane scroller;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentsByClassFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputClass = new JLabel(“输入班级：”);
  txtClass = new JTextField(10);
  txtClass.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputClass);
  pnlNorth.add(txtClass);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按姓名查询学生记录”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  }
  });
  
  // 【班级】文本框按键事件
  txtClass.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtClass.setText(table.getValueAt(row, 5).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询班级
  String clazz = txtClass.getText().trim();
  if (!clazz.equals("")) {
  // 按班级查询获取学生列表
  students = studentService.findStudentsByClass(clazz);
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查班级！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtClass.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“班级”);
  colHead.add(“班级”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“班级”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtClass.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentsByClassFrame("");
  }
  }
  运行结果
  
  按系部查询学生记录
  package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.List;
import java.util.Vector;

/**

功能：按系部查询学生记录
作者：何杰
日期：2019年7月2日
/
public class FindStudentsByDepartmentFrame extends JFrame {
/*
- 系部标签
  /
  private JLabel lblInputDepartment;
  /*
- 系部文本框
  /
  private JTextField txtDepartment;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
  /*
- 按钮
  /
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  */
  private JScrollPane scroller;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentsByDepartmentFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputDepartment = new JLabel(“输入系部：”);
  txtDepartment = new JTextField(10);
  txtDepartment.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputDepartment);
  pnlNorth.add(txtDepartment);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按系部查询学生记录”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  }
  });
  
  // 【系部】文本框按键事件
  txtDepartment.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtDepartment.setText(table.getValueAt(row, 4).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询系部
  String department = txtDepartment.getText().trim();
  if (!department.equals("")) {
  // 按系部查询获取学生列表
  students = studentService.findStudentsByDepartment(department);
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查系部！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtDepartment.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“系部”);
  colHead.add(“系部”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“系部”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtDepartment.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentsByDepartmentFrame("");
  }
  }
  运行结果
  
  输入姓名查找记录
  package net.hj.student.gui;

import net.hj.student.bean.Student;
import net.hj.student.service.StudentService;
import net.hj.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**

功能：输入姓名查找记录
作者：何杰
日期：2019年7月2日
/
public class FindStudentsByNameFrame extends JFrame {
/*
- 姓名标签
  /
  private JLabel lblInputName;
  /*
- 姓名文本框
  */
  private JTextField txtName;
/**
- 面板
  */
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
/**
- 按钮
  */
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
/**
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  */
  private JScrollPane scroller;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentsByNameFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建对象
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputName = new JLabel(“输入姓名：”);
  txtName = new JTextField(10);
  txtName.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputName);
  pnlNorth.add(txtName);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按姓名查询学生记录”);
  // 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);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  }
  });
  
  // 【姓名】文本框按键事件
  txtName.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtName.setText(table.getValueAt(row, 1).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询姓名
  String name = txtName.getText().trim();
  if (!name.equals("")) {
  // 按姓名查询获取学生列表
  students = studentService.findStudentsByName(name);
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查学生姓名！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtName.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“姓名”);
  colHead.add(“姓名”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“班级”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtName.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentsByNameFrame("");
  }
  }
  运行结果
  
  设置学校信息
  package net.hj.student.gui;

import net.hj.student.bean.College;
import net.hj.student.service.CollegeService;
import net.hj.student.service.impl.CollegeServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;

/**

功能：设置学校信息
作者：何杰
日期：2019年7月1日
/
public class SetCollegeInfoFrame extends JFrame {
/*
- 面板
  /
  JPanel panel;
  JPanel pnlNorth;
  JPanel panel1;
  JPanel panel2;
  JPanel panel3;
  JPanel panel4;
  JPanel panel5;
  JPanel pnlCenter;
  JPanel pnlSouth;
  /*
- 标签
  /
  JLabel lblName;
  JLabel lblPresident;
  JLabel lblStartTime;
  JLabel lblTelephone;
  JLabel lblEmail;
  JLabel lblAddress;
  JLabel lblProfile;
  /*
- 按钮
  /
  JButton btnSave;
  JButton btnExit;
  /*
- 文本框与文本区
  /
  JTextField txtName;
  JTextField txtPresident;
  JTextField txtStartTime;
  JTextField txtTelephone;
  JTextField txtEMail;
  JTextField txtAddress;
  JTextArea txtProfile;
  /*
- 滚动面板
  /
  JScrollPane scrollPane;
  /*
- 学校服务
  */
  private CollegeService collegeService;
  private College college;
  private int id = 1;
/**
- 构造方法
- @param title
  */
  public SetCollegeInfoFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件（面板与控件）
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  panel1 = new JPanel();
  panel2 = new JPanel();
  panel3 = new JPanel();
  panel4 = new JPanel();
  panel5 = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  lblName = new JLabel(“学校名称：”);
  lblPresident = new JLabel(“校长：”);
  lblStartTime = new JLabel(“建校时间：”);
  lblTelephone = new JLabel(“联系电话：”);
  lblEmail = new JLabel(“电子邮箱：”);
  lblAddress = new JLabel(“通讯地址：”);
  lblProfile = new JLabel(“学校简介：”);
  
  txtName = new JTextField(30);
  txtPresident = new JTextField(11);
  txtStartTime = new JTextField(12);
  txtTelephone = new JTextField(11);
  txtEMail = new JTextField(12);
  txtAddress = new JTextField(30);
  txtProfile = new JTextArea(5, 37);
  txtProfile.setLineWrap(true);// 让文本区自动换行
  scrollPane = new JScrollPane(txtProfile, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
  ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
  btnSave = new JButton(“保存[S]”);
  btnSave.setMnemonic(KeyEvent.VK_S);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 设置大面板布局，将北面板、中面板与南面板添加到大面板
  panel.setLayout(new BorderLayout());
  panel.add(pnlNorth, “North”);
  panel.add(pnlCenter, “Center”);
  panel.add(pnlSouth, “South”);
  
  // 设置北面板布局，添加五个小面板
  pnlNorth.setLayout(new GridLayout(5, 1));
  pnlNorth.add(panel1);
  pnlNorth.add(panel2);
  pnlNorth.add(panel3);
  pnlNorth.add(panel4);
  pnlNorth.add(panel5);
  
  // 将控件依次添加到五个小面板
  panel1.add(lblName);
  panel1.add(txtName);
  panel2.add(lblPresident);
  panel2.add(txtPresident);
  panel2.add(lblStartTime);
  panel2.add(txtStartTime);
  panel3.add(lblTelephone);
  panel3.add(txtTelephone);
  panel3.add(lblEmail);
  panel3.add(txtEMail);
  panel4.add(lblAddress);
  panel4.add(txtAddress);
  panel5.add(lblProfile);
  
  // 将滚动面板添加到中面板
  pnlCenter.add(scrollPane);
  
  // 将两个按钮添加到南面板
  pnlSouth.add(btnSave);
  pnlSouth.add(btnExit);
  
  // 创建学校服务对象
  collegeService = new CollegeServiceImpl();
  // 获取学校对象
  college = collegeService.findCollegeById(id);
  // 利用学校对象属性值设置相应控件的内容
  txtName.setText(college.getName());
  txtPresident.setText(college.getPresident());
  txtStartTime.setText(college.getStartTime().toString());
  txtTelephone.setText(college.getTelephone());
  txtEMail.setText(college.getEmail());
  txtAddress.setText(college.getAddress());
  txtProfile.setText(college.getProfile());
  
  // 设置窗口大小
  setSize(450, 350);
  // 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();
  // 设置窗口标题
  setTitle(“设置学校信息”);
  // 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);
  
  // 【关闭】按钮单击事件处理
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 关闭窗口
  dispose();
  }
  });
  
  // 【保存】按钮单击事件处理
  btnSave.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  try {
  // 修改学校对象属性
  college.setName(txtName.getText());
  college.setPresident(txtPresident.getText());
  college.setStartTime(new Timestamp(
  new SimpleDateFormat(“yyyy-MM-dd”)
  .parse(txtStartTime.getText().toString()).getTime()));
  college.setTelephone(txtTelephone.getText());
  college.setEmail(txtEMail.getText());
  college.setAddress(txtAddress.getText());
  college.setProfile(txtProfile.getText());
  // 更新学校信息
  collegeService.updateCollege(college);
  // 提示用户更新成功
  JOptionPane.showMessageDialog(null, “更新数据成功！”);
  } catch (ParseException e) {
  // 提示用户更新失败
  JOptionPane.showMessageDialog(null, “更新数据失败！”);
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new SetCollegeInfoFrame("");
  }
  }
  运行结果
  
  设置状态栏信息
  package net.hj.student.gui;

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

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

/**

功能：设置状态栏信息
作者：何杰
日期：2019年7月2日
/
public class SetStatusBarFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel panel1;
  private JPanel panel2;
  private JPanel panel3;
  private JPanel panel4;
  private JPanel panel5;
  /*
- 标签
  /
  private JLabel lblCollege;
  private JLabel lblVersion;
  private JLabel lblAuthor;
  private JLabel lblTelephone;
  private JLabel lblAddress;
  private JLabel lblEmail;
  /*
- 文本框
  /
  private JTextField txtCollege;
  private JTextField txtVersion;
  private JTextField txtAuthor;
  private JTextField txtTelephone;
  private JTextField txtAddress;
  private JTextField txtEmail;
  /*
- 按钮
  /
  private JButton btnSave;
  private JButton btnExit;
  /*
- 状态服务对象
  */
  private StatusService statusService;
/**
- 构造方法
- @param title
  */
  public SetStatusBarFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  panel1 = new JPanel();
  panel2 = new JPanel();
  panel3 = new JPanel();
  panel4 = new JPanel();
  panel5 = new JPanel();
  
  lblCollege = new JLabel(“校名：”);
  lblVersion = new JLabel(“版本：”);
  lblAuthor = new JLabel(“作者：”);
  lblTelephone = new JLabel(“电话：”);
  lblAddress = new JLabel(“地址：”);
  lblEmail = new JLabel(“邮件：”);
  
  txtCollege = new JTextField(12);
  txtVersion = new JTextField(12);
  txtAuthor = new JTextField(12);
  txtTelephone = new JTextField(12);
  txtAddress = new JTextField(29);
  txtEmail = new JTextField(29);
  
  btnSave = new JButton(“保存[S]”);
  btnSave.setMnemonic(KeyEvent.VK_S);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.setLayout(new GridLayout(5, 1));
  panel.add(panel1);
  panel.add(panel2);
  panel.add(panel3);
  panel.add(panel4);
  panel.add(panel5);
  
  panel1.add(lblCollege);
  panel1.add(txtCollege);
  panel1.add(lblVersion);
  panel1.add(txtVersion);
  
  panel2.add(lblAuthor);
  panel2.add(txtAuthor);
  panel2.add(lblTelephone);
  panel2.add(txtTelephone);
  
  panel3.add(lblAddress);
  panel3.add(txtAddress);
  panel4.add(lblEmail);
  panel4.add(txtEmail);
  
  panel5.add(btnSave);
  panel5.add(btnExit);
  
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 按标识符获取状态对象
  Status status = statusService.findStatusById(1);
  if (status != null) {
  txtCollege.setText(status.getCollege());
  txtVersion.setText(status.getVersion());
  txtAuthor.setText(status.getAuthor());
  txtAddress.setText(status.getAuthor());
  txtTelephone.setText(status.getTelephone());
  txtAddress.setText(status.getAddress());
  txtEmail.setText(status.getEmail());
  }
  
  // 设置窗口大小
  setSize(450, 350);
  // 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();
  // 设置窗口标题
  setTitle(“设置状态栏信息”);
  // 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);
  
  // 【关闭】按钮事件处理
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【保存】按钮事件处理
  btnSave.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 获取状态信息对象
  Status status = statusService.findStatusById(1);
  // 修改属性值
  status.setCollege(txtCollege.getText());
  status.setVersion(txtVersion.getText());
  status.setAuthor(txtAuthor.getText());
  status.setTelephone(txtTelephone.getText());
  status.setAddress(txtAddress.getText());
  status.setEmail(txtEmail.getText());
  // 更新状态记录
  int count = statusService.updateStatus(status);
  // 判断是否更新成功
  if (count > 0) {
  Application.mainFrame.setStatusBar();
  Application.mainFrame.setTitle(“学生信息管理系统” + status.getVersion());
  }
  }
  });
  }
  }
  这个必须弄完登录注册之后才能运行
  登录界面
  package net.hj.student.gui;

import net.hj.student.app.Application;
import net.hj.student.bean.Status;
import net.hj.student.bean.User;
import net.hj.student.service.StatusService;
import net.hj.student.service.UserService;
import net.hj.student.service.impl.StatusServiceImpl;
import net.hj.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：何杰
日期：2019年7月1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 btnRegister;

private JPanel panel, panel1, panel2, panel3;

/**
- 构造方法
- @param title
  */
  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[0]”);
  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络布局
  panel.setLayout(new GridLayout(3,1));
  //将三个小面板一次添加到主面板
  panel.add(panel1);
  panel.add(panel2);
  panel.add(panel3);
  
  //设置按钮热键字母
  btnOK.setMnemonic(KeyEvent.VK_0);
  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) {
  //按下回车键，调用登录方法
  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】文本框按键事件处理
  txtPassword.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  //判断是否按了回车键
  if(e.getKeyCode() == KeyEvent.VK_ENTER){
  login();
  }
  }
  });
  //【取消】按钮点击事件处理
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  System.exit(0);
  }
  });
  //【注册】按钮单机事件处理
  btnRegister.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  //隐藏登录窗口
  Application.loginFrame.setVisible(false);
  //创建注册窗口
  Application.registerFrame = 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 = new UserServiceImpl();
  //创建用户
  User user = userService.login(username, password);
  //调用用户数据访问对象的用户名存在与否方法
  boolean result = userService.isUsernameExisted(username);
  //根据用户名获取密码值
  String userPassword = userService.findPasswordByUsername(username);
  //判断密码正确错误
  boolean result1 = userPassword.equals(password);
  //判断密码是否为空
  boolean result2 = password.equals("");
  //判断是否存在来决定登录成功与否
  if (result){
  //判断密码是否错误
  if (result1){
  //隐藏登录窗口
  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 {
  //判断密码是否为空
  if (result2) {
  //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
  JOptionPane.showMessageDialog(null,
  “密码为空，请输入密码！”,
  “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();
  } 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
  JOptionPane.showMessageDialog(null,
  “密码输入错误，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();
  }
  }
  }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
  JOptionPane.showMessageDialog(null,
  “用户名不存在，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”);
}
}
运行结果
没有输入用户名的情况下点击确定

乱输入用户名的情况下点确定

输入正确用户名不输入密码的情况下点确定

用户名正确密码错误的情况下点确定

登录成功之后

点击确认会进入主界面
主界面代码
package net.hj.student.gui;

import net.hj.student.app.Application;
import net.hj.student.bean.Status;
import net.hj.student.service.StatusService;
import net.hj.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：何杰
日期：2019年7月2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(“admin”)) {
  mniSetCollegeInfo.setEnabled(false);
  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("");
  }
  }
  登录之后会显示
  
  注册
  package net.hj.student.gui;

import net.hj.student.app.Application;
import net.hj.student.bean.Student;
import net.hj.student.bean.User;
import net.hj.student.service.StudentService;
import net.hj.student.service.UserService;
import net.hj.student.service.impl.StudentServiceImpl;
import net.hj.student.service.impl.UserServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.security.Provider;
import java.sql.Timestamp;
import java.util.Date;

/**

功能：注册窗口
作者：何杰
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);
  
  //设置面板布局，将四个小面板添加到上面
  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);
  //设置窗口大小不可调整
  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();
  }
  });
  
  // 【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();
  }
  }
  });
  }
  /**
- 注册方法
  */
  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;
  }
  // 对手机号进行非空校验
  if (telephone.equals("")) {
  JOptionPane.showMessageDialog(null, “手机号不能为空！”, “学生信息管理系统”, JOptionPane.WARNING_MESSAGE);
  txtTelephone.requestFocus();
  return;
  }
  
  // 定义用户服务对象
  UserService userService = new UserServiceImpl();
  //调用用户数据访问对象的用户名存在与否方法
  boolean result = userService.isUsernameExisted(username);
  boolean result1 = userService.isTelephoneExisted(telephone);
  //System.out.println(result1);
  //判断用户名是否存在
  if (result){
  JOptionPane.showMessageDialog(null, “用户名重复！不可使用！”, “学生信息管理系统”, JOptionPane.WARNING_MESSAGE);
  }else {
  //判断手机号是否存在
  if (result1){
  JOptionPane.showMessageDialog(null, “手机号重复！不可使用！”, “学生信息管理系统”, JOptionPane.WARNING_MESSAGE);
  }else {
  // 创建用户
  User user = new User();
  user.setUsername(username);
  user.setPassword(password);
  user.setTelephone(telephone);
  user.setRegisterTime(registerTime);
  // 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);
  }
  }
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args){
  Application.registerFrame = new RegisterFrame("");
  }
  }