String sno; UpdateMima(){}
UpdateMima(String username) {
sno=username; f=new JFrame();
cp=f.getContentPane(); // 初始化 jp1=new JPanel(); jp2=new JPanel(); jp3=new JPanel(); jp4=new JPanel();
jpanelWest=new JPanel(); jp=new JPanel();
//------------------------------------------------ jbt1=new JButton(\确定\ jbt2=new JButton(\取消\
//------------------------------------------------
label=new JLabel(\color=#CC00FF size='4'>\ label.setForeground(Color.blue);
label.setFont(new Font(\ name=new JTextField(20); //name.setEditable(false);
//------------------------------------------------ tf1=new JPasswordField(20); tf2=new JPasswordField(20); tf3=new JPasswordField(20);
//------------------------------------------------ //布局,添加控件
jp1.add(jbt1); jp1.add(jbt2);
jp1.add(new JLabel(\您好\欢迎登陆学生信息系统\
JPanel jpanel=new JPanel(); jpanel.add(label);
JPanel pp4=new JPanel();
31
修改密码
JPanel jpane4=new JPanel();
cp.add(jpanel,\
JPanel pp2=new JPanel(new GridLayout(6,1)); JPanel pp3=new JPanel();
pp4.setLayout(new GridLayout(6,1));
pp4.add(new JLabel(\用户名: \ pp2.add(name);
pp4.add(new JLabel(\原密码: \
pp2.add(tf1);
pp4.add(new JLabel(\新密码: \ pp2.add(tf2);
pp4.add(new JLabel(\确认密码: \ pp2.add(tf3);
pp2.add(new JLabel());
JPanel jpbutton=new JPanel(); jpbutton.add(jbt1); jpbutton.add(jbt2); pp2.add(jpbutton);
//pp3.add(jbt1);
//pp3.add(jbt2);
cp.add(pp4,\ cp.add(pp2,\ //cp.add(pp3,\
cp.add(jpane4,\
//------------------------------------------------ Toolkit kit=Toolkit.getDefaultToolkit(); Dimension screen=kit.getScreenSize();
int x=screen.width; /*取得显示器窗口的宽度*/ int y=screen.height;
f.setSize(350,330); /*取得显示器窗口的高度*/ int xcenter=(x-350)/2; int ycenter=(y-330)/2;
f.setLocation(xcenter,ycenter);/*显示在窗口中央*/ //f.setTitle(\修改密码\ f.setVisible(true);
32
//------------------------------------------------- jbt1.addActionListener(this);//注册监听器 jbt2.addActionListener(this);
/*f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){ System.exit(0); } } );*/ }
public void updateM() {
try{
Class.forName(\
}catch(ClassNotFoundException e){System.out.println(\加载驱动程序失败!\
try{
String url = \Access Driver (*.mdb)};DBQ=Book.mdb\ Connection con=DriverManager.getConnection(url);
Statement sql=con.createStatement(); String uname=name.getText().trim();
String queryMima=\用户名='\ ResultSet rs=sql.executeQuery(queryMima); if(rs.next()) {
String newMima=tf2.getText().trim();
String s=%user set 密码='\where 用户名 ='\
sql=con.createStatement();
int updateMima=sql.executeUpdate(s); if(updateMima==1) {
JOptionPane.showMessageDialog(f,\密码修改成功！\ }
con.close(); f.repaint(); }else{
JOptionPane.showMessageDialog(null,\该用户不存在\警告！\ JOptionPane.YES_NO_OPTION);
33
}
name.setText(\ tf1.setText(\ tf2.setText(\ tf3.setText(\ } catch(SQLException g) {
System.out.println(\ System.out.println(\ }
}
//------------------------------------------------ public void actionPerformed(ActionEvent e) {
String cmd=e.getActionCommand(); if(cmd.equals(\确定\ {
if(name.getText().equals(\)||tf3.getText().equals(\ {
JOptionPane.showMessageDialog(null,\请填写用户的所有信息\提示\
JOptionPane.YES_NO_OPTION); return; }
if(tf2.getText().trim().equals(tf3.getText().trim())) updateM(); }
else if(cmd.equals(\取消\ f.hide(); }
public static void main(String[]args) {
new UpdateMima(\ } }
34
四．界面设计
35