Java实训 第五天

GUI窗口
各个部件

添加学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class AddStudentFrame extends JFrame {
    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 JLabel lblId;
    private JLabel lblName;
    private JLabel lblSex;
    private JLabel lblAge;
    private JLabel lblDepartment;
    private JLabel lblClass;
    private JLabel lblTelephone;

    private JTextField txtId;
    private JTextField txtName;
    private JTextField txtSex;
    private JTextField txtAge;
    private JTextField txtDepartment;
    private JTextField txtClass;
    private JTextField txtTelephone;

    private JButton btnExit;
    private JButton btnOK;
    private JButton btnCancel;

    private int currentRow;
    private List<Student> students;

    public AddStudentFrame(String title) {
        super(title);
        initGUI();
    }

    private void initGUI() {
        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);

        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);

        setSize(500, 300);
        setResizable(false);
        pack();
        setLocationRelativeTo(null);
        setTitle("添加学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnOK.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                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;
                }
                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;
                }
                Student student = new Student();
                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());
                StudentService studentService = new StudentServiceImpl();
                int count = studentService.addStudent(student);
                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);
                }
            }
        });

        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();
            }
        });

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

        txtId.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    if (!txtId.getText().trim().equals("")) {
                        txtName.requestFocus();
                    }
                }
            }
        });

        txtName.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtSex.requestFocus();
                }
            }
        });

        txtSex.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtAge.requestFocus();
                }
            }
        });

        txtAge.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtDepartment.requestFocus();
                }
            }
        });

        txtDepartment.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtClass.requestFocus();
                }
            }
        });

        txtClass.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtTelephone.requestFocus();
                }
            }
        });
    }

    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;
    }

    public static void main(String[] args) {
        new AddStudentFrame("");
    }
}

浏览学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class BrowseStudentsFrame extends JFrame {
    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 JLabel lblId;
    private JLabel lblName;
    private JLabel lblSex;
    private JLabel lblAge;
    private JLabel lblDepartment;
    private JLabel lblClass;
    private JLabel lblTelephone;

    private JTextField txtId;
    private JTextField  txtName;
    private JTextField  txtSex;
    private JTextField  txtAge;
    private JTextField  txtDepartment;
    private JTextField  txtClass;
    private JTextField  txtTelephone;

    private JButton btnTop;
    private JButton btnPrevious;
    private JButton btnNext;
    private JButton btnBottom;
    private JButton btnExit;

    private int currentRow;

    private List<Student> students;

    StudentService studentService;

    public BrowseStudentsFrame(String title) {
        super(title);
        initGUI();
    }

    private void initGUI() {
        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);

        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);

        setSize(500, 300);
        setResizable(false);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();
        if (students.size() > 0) {
            currentRow = 1;
            setTitle("浏览学生表记录" + " && 当前记录：" + currentRow);
            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);
        }

        btnTop.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                currentRow = 1;
                fillFrameData(currentRow);
            }
        });

        btnPrevious.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (currentRow > 1) {
                    currentRow--;
                    fillFrameData(currentRow);
                } else {
                    JOptionPane.showMessageDialog(null, "已到第一条记录！", "浏览学生表记录", JOptionPane.WARNING_MESSAGE);
                }
            }
        });

        btnNext.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (currentRow < students.size() - 1) {
                    currentRow++;
                    fillFrameData(currentRow);
                } else {
                    JOptionPane.showMessageDialog(null, "已到最后一条记录！", "浏览学生表记录", JOptionPane.WARNING_MESSAGE);
                }
            }
        });

        btnBottom.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                currentRow = students.size() - 1;
                fillFrameData(currentRow);
            }
        });

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

    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());
        }
    }

    public static void main(String[] args) {
        new BrowseStudentsFrame("");
    }
}

修改用户密码

package net.lr.student.gui;

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

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

/**
 * 功能：修改用户密码
 * 作者：刘瑞
 * 日期：2019.7.2
 */
public class ChangePasswordFrame extends JFrame {
    private JPanel panel;
    private JPanel pnlRow1;
    private JPanel pnlRow2;
    private JPanel pnlRow3;
    private JPanel pnlRow4;
    private JPanel pnlRow5;

    private JLabel lblUsername;
    private JLabel lblPassword;
    private JLabel lblNewPassword1;
    private JLabel lblNewPassword2;

    private JTextField txtUsername;
    private JPasswordField txtPassword;
    private JPasswordField txtNewPassword1;
    private JPasswordField txtNewPassword2;

    private JButton btnOK;
    private JButton btnCancel;

    private UserService userService;

    public ChangePasswordFrame(String title) {
        super(title);
        initGUI();
    }

    private void initGUI() {
        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);

        panel.setLayout(new GridLayout(5, 1));
        panel.add(pnlRow1);
        panel.add(pnlRow2);
        panel.add(pnlRow3);
        panel.add(pnlRow4);
        panel.add(pnlRow5);

        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);

        setResizable(false);
        pack();
        setLocationRelativeTo(null);
        setTitle("修改用户密码");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        txtUsername.setEditable(false);
        txtUsername.setText(Application.username);

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

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

        btnOK.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == 10) {
                    changePassword();
                }
            }
        });

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

        txtPassword.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtNewPassword1.requestFocus();
                }
            }
        });

        txtNewPassword1.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    txtNewPassword2.requestFocus();
                }
            }
        });

        txtNewPassword2.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    btnOK.requestFocus();
                }
            }
        });
    }

    private void changePassword() {
        int id = Application.id;
        String username = Application.username;
        String password = new String(txtPassword.getPassword());
        String newPassword1 = new String(txtNewPassword1.getPassword());
        String newPassword2 = new String(txtNewPassword2.getPassword());

        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 {
            User user = userService.findUserById(id);
            user.setPassword(newPassword1);
            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);
            }
        }
    }

    public static void main(String[] args) {
        Application.id = 1;
        Application.username = "李刚";
        new ChangePasswordFrame("");
    }
}

按班级统计学生人数

package net.lr.student.gui;

import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class CountStudentsByClassFrame extends JFrame {

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;

    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;
    private StudentService studentService;

    public CountStudentsByClassFrame(String title) {
        super(title);
        initGUI();
    }

    private void initGUI() {
        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);

        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);
        studentService = new StudentServiceImpl();
        rows = studentService.findRowsByClass();
        colHead.add("班级");
        colHead.add("人数");
        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();
        if (rows.isEmpty()) {
            JOptionPane.showMessageDialog(this, "没有记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
        }

        setSize(300, 200);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按班级统计学生人数");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                dispose();
            }
        });

        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });
    }

    public static void main(String[] args) {
        new CountStudentsByClassFrame("");
    }
}

按系部统计学生人数

package net.lr.student.gui;

import net.lr.student.service.StudentService;
import net.lr.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：按系部统计学生人数
 * 作者：刘瑞
 * 日期：2019.7.2
 */
public class CountStudentsByDepartmentFrame extends JFrame {
    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;

    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;
    private StudentService studentService;

    public CountStudentsByDepartmentFrame(String title) {
        super(title);
        initGUI();
    }

    private void initGUI() {
        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);

        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);

        studentService = new StudentServiceImpl();
        rows = studentService.findRowsByDepartment();
        colHead.add("系部");
        colHead.add("人数");

        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();

        if (rows.isEmpty()) {
            JOptionPane.showMessageDialog(this, "没有记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
        }

        setSize(300, 200);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按系部统计学生人数");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                dispose();
            }
        });

        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });
    }

    public static void main(String[] args) {
        new CountStudentsByDepartmentFrame("");
    }
}

按性别统计学生人数

package net.lr.student.gui;

import net.lr.student.service.StudentService;
import net.lr.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;
import java.util.List;

/**
 * 功能：按性别统计学生人数
 * 作者：刘瑞
 * 日期：2019.7.2
 */
public class CountStudentsBySexFrame extends JFrame {
    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;

    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;
    private StudentService studentService;

    public CountStudentsBySexFrame(String title) {
        super(title);
        initGUI();
    }

    private void initGUI() {
        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);

        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);

        studentService = new StudentServiceImpl();
        rows = studentService.findRowsBySex();
        colHead.add("性别");
        colHead.add("人数");
        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();

        if (rows.isEmpty()) {
            JOptionPane.showMessageDialog(this, "没有记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
        }

        setSize(300, 200);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按性别统计学生人数");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                dispose();
            }
        });

        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });
    }

    public static void main(String[] args) {
        new CountStudentsBySexFrame("");
    }
}

按学号删除学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class DeleteStudentByIdFrame extends JFrame {
    private JLabel lblInputId;
    private JTextField txtId;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnDelete;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;
    private JTable table;
    private JScrollPane scroller;
    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();

        fillTableData();
        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按学号删除学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });

        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) {
                        String id = txtId.getText().trim();
                        int count = studentService.deleteStudentById(id);
                        if (count > 0) {
                            JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                            students = studentService.findAllStudents();
                            txtId.setText("");
                            fillTableData();
                            btnDelete.setEnabled(false);
                        } else {
                            JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                        }
                    }
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
                btnDelete.setEnabled(false);
            }
        });

        txtId.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                table.setRowSelectionInterval(row, row);
                txtId.setText(table.getValueAt(row, 0).toString());
            }
        });
    }

    private void doQuery() {
        String id = txtId.getText().trim();
        if (!id.equals("")) {
            students.clear();
            Student student = studentService.findStudentById(id);
            if (student != null) {
                students.add(student);
                btnDelete.setEnabled(true);
            }
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查学生学号！", "警告", JOptionPane.WARNING_MESSAGE);
            txtId.requestFocus();
        }
    }

    private void fillTableData() {
        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");

        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }
        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();
        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new DeleteStudentByIdFrame("");
    }
}

按班级删除学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class DeleteStudentsByClassFrame extends JFrame {
    private JLabel lblInputClass;
    private JTextField txtClass;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnDelete;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;
    private JTable table;
    private JScrollPane scroller;
    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();
        fillTableData();

        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按班级删除学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });

        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) {
                        String clazz = txtClass.getText().trim();
                        int count = studentService.deleteStudentsByClass(clazz);
                        if (count > 0) {
                            JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                            students = studentService.findAllStudents();
                            txtClass.setText("");
                            fillTableData();
                            btnDelete.setEnabled(false);
                        } else {
                            JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                        }
                    }
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
                btnDelete.setEnabled(false);
            }
        });

        txtClass.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                if (row <= table.getRowCount()) {
                    table.setRowSelectionInterval(row, row);
                    txtClass.setText(table.getValueAt(row, 5).toString());
                }
            }
        });
    }

    private void doQuery() {
        String clazz = txtClass.getText().trim();
        if (!clazz.equals("")) {
            students = studentService.findStudentsByClass(clazz);
            if (students.size() > 0) {
                btnDelete.setEnabled(true);
            }
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查班级！", "警告", JOptionPane.WARNING_MESSAGE);
            txtClass.requestFocus();
        }
    }

    private void fillTableData() {
        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");

        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }

        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();

        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new DeleteStudentsByClassFrame("");
    }
}

按系部删除学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class DeleteStudentsByDepartmentFrame extends JFrame {
    private JLabel lblInputDepartment;
    private JTextField txtDepartment;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnDelete;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;
    private JTable table;
    private JScrollPane scroller;

    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();
        fillTableData();

        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按系部删除学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });

        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) {
                        String department = txtDepartment.getText().trim();
                        int count = studentService.deleteStudentsByDepartment(department);
                        if (count > 0) {
                            JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                            students = studentService.findAllStudents();
                            txtDepartment.setText("");
                            fillTableData();
                            btnDelete.setEnabled(false);
                        } else {
                            JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                        }
                    }
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
                btnDelete.setEnabled(false);
            }
        });

        txtDepartment.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                table.setRowSelectionInterval(row, row);
                txtDepartment.setText(table.getValueAt(row, 4).toString());
            }
        });
    }

    private void doQuery() {
        String department = txtDepartment.getText().trim();
        if (!department.equals("")) {
            students = studentService.findStudentsByDepartment(department);
            if (students.size() > 0) {
                btnDelete.setEnabled(true);
            }
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查系部！", "警告", JOptionPane.WARNING_MESSAGE);
            txtDepartment.requestFocus();
        }
    }

    private void fillTableData() {
        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");
        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }
        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();
        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new DeleteStudentsByDepartmentFrame("");
    }
}

按学号查询学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.1
 */
public class FindStudentByIdFrame extends JFrame {
    private JLabel lblInputId;
    private JTextField txtId;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;

    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();
        fillTableData();

        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按学号查询学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });

        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
                btnPrint.setEnabled(false);
            }
        });

        txtId.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                table.setRowSelectionInterval(row, row);
                txtId.setText(table.getValueAt(row, 0).toString());
            }
        });
    }

    private void doQuery() {
        String id = txtId.getText().trim();
        if (!id.equals("")) {
            students.clear();
            Student student = studentService.findStudentById(id);
            if (student != null) {
                students.add(student);
            }
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查学生学号！", "警告", JOptionPane.WARNING_MESSAGE);
            txtId.requestFocus();
        }
    }

    private void fillTableData() {
        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");
        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }
        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();
        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new FindStudentByIdFrame("");
    }
}

按班级查询

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：刘瑞
 * 日期：2019.7.2
 */
public class FindStudentsByClassFrame extends JFrame {
    private JLabel lblInputClass;
    private JTextField txtClass;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;
    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();
        fillTableData();

        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按姓名查询学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });
        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
            }
        });
        txtClass.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                table.setRowSelectionInterval(row, row);
                txtClass.setText(table.getValueAt(row, 5).toString());
            }
        });
    }

    private void doQuery() {
        String clazz = txtClass.getText().trim();
        if (!clazz.equals("")) {
            students = studentService.findStudentsByClass(clazz);
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查班级！", "警告", JOptionPane.WARNING_MESSAGE);
            txtClass.requestFocus();
        }
    }

    private void fillTableData() {
        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");
        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }
        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();
        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new FindStudentsByClassFrame("");
    }
}

按系部查询

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：按系部查询学生记录
 * 作者：刘瑞
 * 日期：2019.7.2
 */
public class FindStudentsByDepartmentFrame extends JFrame {
    private JLabel lblInputDepartment;
    private JTextField txtDepartment;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;

    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);
        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();

        fillTableData();
        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按系部查询学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });

        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
            }
        });

        txtDepartment.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                table.setRowSelectionInterval(row, row);
                txtDepartment.setText(table.getValueAt(row, 4).toString());
            }
        });
    }

    private void doQuery() {
        String department = txtDepartment.getText().trim();
        if (!department.equals("")) {
            students = studentService.findStudentsByDepartment(department);
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查系部！", "警告", JOptionPane.WARNING_MESSAGE);
            txtDepartment.requestFocus();
        }
    }

    private void fillTableData() {
        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");
        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }
        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();
        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new FindStudentsByDepartmentFrame("");
    }
}

按姓名查询学生记录

package net.lr.student.gui;

import net.lr.student.bean.Student;
import net.lr.student.service.StudentService;
import net.lr.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：按姓名查询学生记录
 * 日期：2019.7.2
 */

public class FindStudentsByNameFrame extends JFrame {
    private JLabel lblInputName;
    private JTextField txtName;

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private Vector rows;
    private Vector<String> colHead;

    private JTable table;
    private JScrollPane scroller;
    private int currentRow;
    private List<Student> students;
    private StudentService studentService;

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

    private void intiGUI() {
        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);

        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());

        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        studentService = new StudentServiceImpl();
        students = studentService.findAllStudents();
        fillTableData();

        setSize(600, 350);
        setResizable(false);
        setLocationRelativeTo(null);
        setTitle("按姓名查询学生记录");
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                dispose();
            }
        });

        btnPrint.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    table.print();
                } catch (PrinterException e1) {
                    e1.printStackTrace();
                }
            }
        });

        btnQuery.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                doQuery();
            }
        });

        btnBrowseAll.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                students = studentService.findAllStudents();
                fillTableData();
            }
        });

        txtName.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    doQuery();
                }
            }
        });

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int row = table.rowAtPoint(e.getPoint());
                table.setRowSelectionInterval(row, row);
                txtName.setText(table.getValueAt(row, 1).toString());
            }
        });
    }

    private void doQuery() {
        String name = txtName.getText().trim();
        if (!name.equals("")) {
            students = studentService.findStudentsByName(name);
            fillTableData();
        } else {
            JOptionPane.showMessageDialog(this, "请输入待查学生姓名！", "警告", JOptionPane.WARNING_MESSAGE);
            txtName.requestFocus();
        }
    }

    private void fillTableData() {
        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");
        rows.clear();
        for (Student student : students) {
            Vector<String> currentRow = new Vector<String>();
            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());
            rows.add(currentRow);
        }

        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();
        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 {
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
        new FindStudentsByNameFrame("");
    }
}