Java开发的学生信息管理系统

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import java.util.*; public class Change extends JPanel implements ActionListener { Hashtable 基本信息表; JTextField no,name,zhuanye,grade,birth; JRadioButton 男,女; ButtonGroup group; JButton 修改,录入修改,重置; FileInputStream inOne; ObjectInputStream inTwo; FileOutputStream outOne; ObjectOutputStream outTwo; File file; public Change(File file) { this.file=file; no=new JTextField(10); name=new JTextField(10); zhuanye=new JTextField(10); grade=new JTextField(10); birth=new JTextField(10); group=new ButtonGroup(); 男=new JRadioButton("男",true); 女=new JRadioButton("女",false); group.add(男); group.add(女); 修改=new JButton("确定修改"); 录入修改=new JButton("录入修改"); 录入修改.setEnabled(false); 重置=new JButton("重置"); no.addActionListener(this); 修改.addActionListener(this); 录入修改.addActionListener(this); 重置.addActionListener(this); Box box1=Box.createHorizontalBox(); box1.add(new JLabel("输入要修改的学号:",JLabel.CENTER)); box1.add(no); box1.add(修改); Box box2=Box.createHorizontalBox(); box2.add(new JLabel("姓名:",JLabel.CENTER)); box2.add(name); Box box3=Box.createHorizontalBox(); box3.add(new JLabel("性别:",JLabel.LEFT)); box3.add(男); box3.add(女); Box box4=Box.createHorizontalBox(); box4.add(new JLabel("专业:",JLabel.CENTER)); box4.add(zhuanye); Box box5=Box.createHorizontalBox(); box5.add(new JLabel("年级:",JLabel.CENTER)); box5.add(grade); Box box6=Box.createHorizontalBox(); box6.add(new JLabel("出生:",JLabel.CENTER)); box6.add(birth); Box boxH=Box.createVerticalBox(); boxH.add(box1); boxH.add(box2); boxH.add(box3); boxH.add(box4); boxH.add(box5); boxH.add(box6); boxH.add(Box.createVerticalGlue()); JPanel pCenter=new JPanel(); pCenter.add(boxH); setLayout(new BorderLayout()); add(pCenter,BorderLayout.CENTER); JPanel pSouth=new JPanel(); pSouth.add(录入修改); pSouth.add(重置); add(pSouth,BorderLayout.SOUTH); validate(); } public void actionPerformed(ActionEvent e) { if(e.getSource()==修改||e.getSource()==no) { String number=""; number=no.getText(); if(number.length()>0) { try { inOne=new FileInputStream(file); inTwo=new ObjectInputStream(inOne); 基本信息表=(Hashtable)inTwo.readObject(); inOne.close(); inTwo.close(); } catch(Exception ee) { } if(基本信息表.containsKey(number)) { 录入修改.setEnabled(true); Student stu=(Student)基本信息表.get(number); name.setText(stu.getName()); zhuanye.setText(stu.getDisciping()); grade.setText(stu.getGrade()); birth.setText(stu.getBorth()); if(stu.getSex().equals("男")) { 男.setSelected(true); } else { 女.setSelected(true); } } else { 录入修改.setEnabled(false); String warning="该学号不存在!"; JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE); no.setText(null); name.setText(null); zhuanye.setText(null); grade.setText(null); birth.setText(null); } } else { 录入修改.setEnabled(false); String warning="必须要输入学号!"; JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE); no.setText(null); name.setText(null); zhuanye.setText(null); grade.setText(null); birth.setText(null); } } else if(e.getSource()==录入修改) { String number=""; number=no.getText(); if(number.length()>0) { try { inOne=new FileInputStream(file); inTwo=new ObjectInputStream(inOne); 基本信息表=(Hashtable)inTwo.readObject(); inOne.close(); inTwo.close(); } catch(Exception ee) { } if(基本信息表.containsKey(number)) { String question="该生基本信息已存在,您想修改吗?"; JOptionPane.showMessageDialog(this,question,"警告",JOptionPane.QUESTION_MESSAGE); String m="基本信息将被修改!"; int ok=JOptionPane.showConfirmDialog(this,m,"确认",JOptionPane.YES_NO_OPTION, JOptionPane.INFORMATION_MESSAGE); if(ok==JOptionPane.YES_OPTION) { String name1=name.getText(); String discipling=zhuanye.getText(); String grade1=grade.getText(); String borth1=birth.getText(); String sex=null; if(男.isSelected()) { sex=男.getText(); } else { sex=女.getText(); } Student 学生=new Student(); 学生.setNumber(number); 学生.setName(name1); 学生.setDiscipling(discipling); 学生.setGrade(grade1); 学生.setBorth(borth1); 学生.setSex(sex); try { outOne=new FileOutputStream(file); outTwo=new ObjectOutputStream(outOne); 基本信息表.put(number,学生); outTwo.writeObject(基本信息表); outTwo.close(); outOne.close(); no.setText(null); name.setText(null); zhuanye.setText(null); grade.setText(null); birth.setText(null); } catch(Exception ee) { System.out.println(ee); } 录入修改.setEnabled(false); } else if(ok==JOptionPane.NO_OPT