1. 更新录入，修改，删除，查询按钮
2. 优化代码，代码更简洁
注意image代码在0.2版本已经公布，注意看以前的代码！
import java.awt.*; import java.awt.event.*; import javax.swing.*; import frame.ImagePanel; public class Login{ public static void main (String []args){ AFrame f = new AFrame("学生信息管理系统"); } } class AFrame extends JFrame{ JButton b1; JButton b2; JTextField t1; JTextField t2; public AFrame(String title){ super(title); this.setLayout(null); Panel p = new Panel(); b1 =new JButton("登陆"); b2 =new JButton("取消"); t1 =new JTextField(25); t1.setFont(new Font("宋体",Font.BOLD,25)); t2 =new JPasswordField(25); t2.setFont(new Font("宋体",Font.BOLD,25)); JLabel nameLabel = new JLabel("用户名"); nameLabel.setFont(new Font("宋体",Font.BOLD,25)); nameLabel.setHorizontalAlignment(JTextField.CENTER); JLabel pwdLabel = new JLabel("密码"); pwdLabel.setFont(new Font("宋体",Font.BOLD,25)); pwdLabel.setHorizontalAlignment(JTextField.CENTER); this.setBounds(300,300,1000,500); this.add(nameLabel); this.add(t1); this.add(pwdLabel); this.add(t2); this.add(b1); this.add(b2); nameLabel.setBounds(100,100,200,50); pwdLabel.setBounds(100,200,200,50); t1.setBounds(600,100,200,50); t2.setBounds(600,200,200,50); b1.setBounds(100,300,200,50); b2.setBounds(600,300,200,50); b1.addActionListener (new ResponseButton()); b2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null,"单击确定退出"); System.exit(0); } }); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); getRootPane().setDefaultButton(b1); b1.addKeyListener (new KeyAdapter(){ public void keyPressed(KeyEvent e){ if(e.getKeyCode() == KeyEvent.VK_ENTER) { AFrame2 f1 = new AFrame2("学生信息管理系统-123456"); }else{ System.out.print(t1.getText()); JOptionPane.showMessageDialog(null, "账号或者密码错误", "Error.mxy",JOptionPane.ERROR_MESSAGE); } } }); ImagePanel ip = new ImagePanel(new ImageIcon("C:\\Users\\admin\\Desktop\\logo.png").getImage()); this.add(ip); } public class ResponseButton implements ActionListener{ public void actionPerformed(ActionEvent e){ String str ="123456"; if(t1.getText().equals(str)&&t2.getText().equals(str) ){ AFrame2 f1 = new AFrame2("学生信息管理系统-123456"); }else{ System.out.print(t1.getText()); JOptionPane.showMessageDialog(null, "账号或者密码错误", "Error.mxy",JOptionPane.ERROR_MESSAGE); } } } class AFrame2 extends JFrame{ JButton b3; JButton b4; JButton b5; JButton b6; public AFrame2(String title){ super(title); b3 =new JButton("录入"); b4 =new JButton("查询"); b5 =new JButton("修改"); b6 =new JButton("删除"); this.add(b3); this.add(b4); this.add(b5); this.add(b6); b3.setBounds(100,80,160,100); b4.setBounds(100,290,160,100); b5.setBounds(300,80,160,100); b6.setBounds(300,290,160,100); b3.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ AFrame3 f2 = new AFrame3("学生信息管理系统-录入"); } }); b4.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ AFrame4 f3 = new AFrame4("学生信息管理系统-查询"); } }); b5.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ AFrame5 f4 = new AFrame5("学生信息管理系统-修改"); } }); b6.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ AFrame6 f4 = new AFrame6("学生信息管理系统-删除"); } }); this.setLayout(null); this.setBounds(300,300,600,500); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } } class AFrame3 extends JFrame{ JTextField t3; JTextField t4; JTextField t5; JTextField t6; JTextField t7; JLabel nameLabel2; JLabel studentnumber; JLabel major; JLabel age; JLabel sex; JButton b7; JButton b8; JLabel l1; public AFrame3(String title){ super(title); this.setLayout(null); l1 = new JLabel("录入系统"); l1.setForeground(Color.gray); l1.setFont(new Font("宋体",Font.BOLD,20)); l1.setHorizontalAlignment(JTextField.CENTER); nameLabel2 =new JLabel("姓名："); nameLabel2.setFont(new Font("宋体",Font.BOLD,25)); nameLabel2.setHorizontalAlignment(JTextField.CENTER); major =new JLabel("专业："); major.setFont(new Font("宋体",Font.BOLD,25)); major.setHorizontalAlignment(JTextField.CENTER); age =new JLabel("年龄："); age.setFont(new Font("宋体",Font.BOLD,25)); age.setHorizontalAlignment(JTextField.CENTER); sex =new JLabel("性别："); sex.setFont(new Font("宋体",Font.BOLD,25)); sex.setHorizontalAlignment(JTextField.CENTER); studentnumber = new JLabel("学号："); studentnumber.setFont(new Font("宋体",Font.BOLD,25)); studentnumber.setHorizontalAlignment(JTextField.CENTER); t3 =new JTextField(25); t3.setFont(new Font("宋体",Font.BOLD,25)); t4 =new JTextField(25); t4.setFont(new Font("宋体",Font.BOLD,25)); t5 =new JTextField(25); t5.setFont(new Font("宋体",Font.BOLD,25)); t6 =new JTextField(25); t6.setFont(new Font("宋体",Font.BOLD,25)); t7 =new JTextField(25); t7.setFont(new Font("宋体",Font.BOLD,25)); b7 = new JButton("录入"); b8 = new JButton("取消"); b8.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null,"单击确定退出"); System.exit(0); } }); this.add(t3); this.add(t4); this.add(t5); this.add(t6); this.add(t7); this.add(nameLabel2); this.add(major); this.add(age); this.add(sex); this.add(studentnumber); this.add(l1); this.add(b8); this.add(b7); t3.setBounds(180,40,180,50); t4.setBounds(180,100,180,50); t5.setBounds(180,160,180,50); t6.setBounds(180,220,180,50); t7.setBounds(180,280,180,50); nameLabel2.setBounds(0,40,180,50); age.setBounds(0,100,180,50); sex.setBounds(0,160,180,50); studentnumber.setBounds(0,220,180,50); major.setBounds(0,280,180,50); l1.setBounds(0,0,360,40); b7.setBounds(50,360,100,50); b8.setBounds(220,360,100,50); this.setBounds(900,300,400,500); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//xiugai this.setVisible(true); } } class AFrame4 extends JFrame{ JButton b9; JButton b10; JTextField t8; JLabel l2; JLabel l3; public AFrame4(String title){ super(title); b9 = new JButton("查询"); b10 = new JButton("取消"); t8 = new JTextField(25); t8.setFont(new Font("宋体",Font.BOLD,25)); l2 = new JLabel("输入学号："); l2.setFont(new Font("宋体",Font.BOLD,25)); l2.setHorizontalAlignment(JTextField.CENTER); l3 = new JLabel("查询系统"); l3.setForeground(Color.gray); l3.setFont(new Font("宋体",Font.BOLD,20)); l3.setHorizontalAlignment(JTextField.CENTER); this.add(b9); this.add(b10); this.add(t8); this.add(l2); this.add(l3); b9.setBounds(50,300,100,50); b10.setBounds(200,300,100,50); t8.setBounds(180,160,180,50); l2.setBounds(0,160,180,50); l3.setBounds(0,0,360,40); b10.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null,"单击确定退出"); System.exit(0); } }); this.setLayout(null); this.setBounds(900,300,400,500); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } } class AFrame5 extends AFrame4{ public AFrame5(String title){ super(title); l3.setText("修改系统"); } } class AFrame6 extends AFrame4{ public AFrame6(String title){ super(title); l3.setText("删除系统"); } } }
