基于Java Swing简单学生请假信息管理系统(JavaSE基础程序设计课程设计期末作业)

package xuesheng; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.util.Enumeration; import java.util.Hashtable; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.*; public class Menu { private JFrame frame = new JFrame("申请表填写"); // 框架 private JButton but1 = new JButton("提交申请"); // 按钮 private JButton but4 = new JButton("查看数据"); private JButton but0 = new JButton("退出系统"); private JButton clear = new JButton("清空"); private JTextField number = new JTextField();// 文本框 private JTextField name = new JTextField(); private JTextField classe = new JTextField(); private JTextField why = new JTextField(); private JTextField when = new JTextField(); private JTextArea show = new JTextArea(16, 30); private JLabel lab1 = new JLabel("姓名:");// 标签 private JLabel lab2 = new JLabel("班级:"); private JLabel num = new JLabel("学号:"); private JLabel lab4 = new JLabel("请假缘由:"); private JLabel lab5 = new JLabel("请假时间:"); Hashtable<String, Person> has = new Hashtable<String, Person>();// 哈希表，加密，文件乱码 File file = new File("新建文件.txt");// 注意：新建一个文件 public Menu() { if (!file.exists()) { try { ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(file));// 把一个实例的对象以文件的形式保存到磁盘上。 out.writeObject(has); out.close(); } catch (IOException e) { } } but1.addActionListener(new ActionListener() { // 增加，内部类，进行某项操作时触发功能 public void actionPerformed(ActionEvent e) {//用于接收操作事件的侦听器接口 if (e.getSource() == but1) { String number1 = number.getText(); if (number1.length() == 11) { try { ObjectInputStream in = new ObjectInputStream(new FileInputStream(file));//读回对象 has = (Hashtable) in.readObject(); in.close(); } catch (Exception e1) { } } else { JOptionPane.showMessageDialog(null, "请输入11位数字的学号");//提示框显示 } // if (number1.length() == 11) { String name1 = name.getText(); String classe1 = classe.getText(); String why1 = why.getText(); String when1 = when.getText(); Person per = null; per = new Person(number1, name1, classe1, why1,when1); has.put(number1, per);// ??? try { ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(file)); out.writeObject(has); out.close(); JOptionPane.showMessageDialog(null, "提交成功！"); } catch (Exception e1) {} } } } }); clear.addActionListener(new ActionListener() { // 清空 public void actionPerformed(ActionEvent e) { if (e.getSource() == clear) {//获得事件所作用的对象 number.setText(null); classe.setText(null); name.setText(null); why.setText(null); when.setText(null); } } }); but4.addActionListener(new ActionListener() { // 查看 public void actionPerformed(ActionEvent e) { if (e.getSource() == but4) { try { ObjectInputStream in = new ObjectInputStream(new FileInputStream(file)); has = (Hashtable) in.readObject(); in.close(); } catch (Exception ee) { } if (has.isEmpty()) { show.append("目前还没有学生的信息记录！\n"); // append(s:String)向文本域的文本追加字符串，简单的说就像system.out.println() } else { for (Enumeration enu = has.elements(); enu.hasMoreElements();) //存入内存的内容如果不经过遍历是显示不出来的 { Person per = (Person) enu.nextElement(); String str = " <学号>：" + per.getNum() + "\n" + " <姓名>：" + per.getName() + "\n" + " <班级>："+ per.getClasse() + "\n" + " <原因>：" + per.getWhy() + "\n"+" <时间级>："+ per.getWhen() + "\n" + "\n" + "\n"; show.append(str); } String str2 = "---------------------------------结束------------------------------------------------"+ "\n"; show.append(str2); } String number1 = number.getText(); if (number1.length() == 11) { if (has.containsKey(number1)) { try { ObjectInputStream in = new ObjectInputStream(new FileInputStream(file)); has = (Hashtable) in.readObject(); in.close(); } catch (Exception e1) { } Person per = (Person) has.get(number1); name.setText(per.getName()); classe.setText(per.getClasse()); why.setText(per.getWhy()); when.setText(per.getWhen()); } else { JOptionPane.showMessageDialog(null, "学号不存在"); } } else { JOptionPane.showMessageDialog(null, "请输入11位数字的学号"); } } } }); but0.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (e.getSource() == but0) { frame.setVisible(false); new ActionHandle(); } } }); frame.setLayout(null); but1.setBounds(30, 35, 90, 25); but4.setBounds(30, 115, 90, 25); but0.setBounds(240, 250, 100, 25); // setBounds(x,y,width,height); num.setBounds(150, 30, 70, 25); lab1.setBounds(150, 65, 70, 25); lab2.setBounds(150, 100, 70, 25); lab4.setBounds(150, 135, 70, 25); lab5.setBounds(150, 170, 70, 25); number.setBounds(230, 30, 90, 25); name.setBounds(230, 65, 90, 25); classe.setBounds(230, 100, 90, 25); why.setBounds(230, 135, 90, 25); when.setBounds(230, 170, 90, 25); clear.setBounds(250, 200, 60, 25); frame.add(lab1); frame.add(lab2); frame.add(lab4); frame.add(lab5); frame.add(num); frame.add(number); frame.add(name); frame.add(classe); frame.add(why); frame.add(when); frame.add(clear); frame.add(but1); frame.add(but4); frame.add(but0); JScrollPane scroll = new JScrollPane(show); frame.setSize(800, 700); // 页面大小 frame.setLocation(300, 200); frame.setVisible(true); } }