程序将初始化密码。然后，如果用户想要更改密码，则他们将单击更改密码按钮。然后，程序将打开一个新窗口，然后用户将必须输入当前密码，新密码和确认密码，然后如果再次登录，密码将更改。 我的程序的问题是它不会更改其密码，并且始终是初始化的密码。我该如何解决？这是我的代码：
//FinalLoginForm class
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.event.ActionListener;
public class FinalLoginForm extends JFrame implements ActionListener{
JLabel unLabel;
JLabel pwLabel;
JTextField unTextField;
JPasswordField pwPasswordField;
final JButton okButton = new JButton("OK");
final JButton newPwButton = new JButton("Change Password");
static FinalLoginForm myLogin = new FinalLoginForm();
static FinalChangePassword change = new FinalChangePassword();
String password = "Mariel97!";
public FinalLoginForm(){
super("Login Window");
setLayout(null);
unLabel = new JLabel("Username: ");
pwLabel = new JLabel("Password: ");
unTextField = new JTextField("");
pwPasswordField = new JPasswordField("");
okButton.setName("OK");
newPwButton.setName("Change Password");
unLabel.setBounds(40,60,100,30); unTextField.setBounds(120,60,100,30);
pwLabel.setBounds(40,90,100,30); pwPasswordField.setBounds(120,90,100,30);
okButton.setBounds(20,120,100,30); newPwButton.setBounds(120,120,150,30);
add(unLabel);
add(pwLabel);
add(unTextField);
add(pwPasswordField);
add(okButton);
add(newPwButton);
okButton.addActionListener(this);
newPwButton.addActionListener(this);
}
public void actionPerformed(ActionEvent e){
if(okButton.getName().equals(((Component)e.getSource()).getName())){
if(unTextField.getText().equals("mvbasbas")&& (new String(pwPasswordField.getPassword())).equals(password)){
JOptionPane.showMessageDialog(this, "Welcome "+unTextField.getText()+"!", "Welcome!", JOptionPane.INFORMATION_MESSAGE);
}
else
JOptionPane.showMessageDialog(this, "Invalid username or password!", "Error!", JOptionPane.ERROR_MESSAGE);
}
else if(newPwButton.getName().equals(((Component)e.getSource()).getName())){
FinalChangePassword changes = new FinalChangePassword();
changes.setVisible(true);
changes.setSize(300, 300);
changes.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
changes.setResizable(false);
myLogin.setVisible(false);JOptionPane.showMessageDialog(this, "Welcome "+msg+"!", "Login Form", JOptionPane.WARNING_MESSAGE);
}
}
public static void main(String args[]){
myLogin.setVisible(true);
myLogin.setResizable(false);
myLogin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myLogin.setSize(300,300);
}
}
空白
//FinalChangePassword
import java.util.regex.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.event.ActionListener;
public class FinalChangePassword extends JFrame implements ActionListener{
JLabel currentPwLabel;
JLabel newPwLabel;
JLabel confirmPwLabel;
JPasswordField currentPasswordField;
JPasswordField newPasswordField;
JPasswordField confirmPasswordField;
JButton okButton;
JButton cancelButton;
static FinalLoginForm myLogin = new FinalLoginForm();
static FinalChangePassword change = new FinalChangePassword();
String currentPassword;
String newPassword;
String confirmPassword;
public FinalChangePassword(){
super("Change Password");
setLayout(null);
currentPwLabel = new JLabel("Current Password: ");
newPwLabel = new JLabel("New Password: ");
confirmPwLabel = new JLabel("Confirm Password: ");
currentPasswordField = new JPasswordField("");
newPasswordField = new JPasswordField("");
confirmPasswordField = new JPasswordField("");
okButton = new JButton("OK");
cancelButton = new JButton("Cancel");
currentPwLabel.setBounds(30,60,200,35); currentPasswordField.setBounds(145,60,100,30);
newPwLabel.setBounds(30,90,100,35); newPasswordField.setBounds(145,90,100,30);
confirmPwLabel.setBounds(30,120,200,35); confirmPasswordField.setBounds(145,120,100,30);
okButton.setBounds(45,150,100,30); cancelButton.setBounds(145,150,100,30);
add(currentPwLabel);
add(newPwLabel);
add(confirmPwLabel);
add(currentPasswordField);
add(newPasswordField);
add(confirmPasswordField);
add(okButton);
add(cancelButton);
okButton.addActionListener(this);
cancelButton.addActionListener(this);
}
public static void main(String args[])throws NullPointerException{
change.setVisible(true);
change.setSize(300, 300);
change.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
change.setResizable(false);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==okButton){
int response = JOptionPane.showConfirmDialog(this, "Do you want to change your password?", "Changing",JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
if(response == JOptionPane.YES_OPTION){
char[] curPw = currentPasswordField.getPassword();
currentPassword = new String(curPw);
char[] newPw = newPasswordField.getPassword();
newPassword = new String(newPw);
char[] conPw = confirmPasswordField.getPassword();
confirmPassword = new String(conPw);
if(myLogin.password.equals(currentPassword)){
if(newPassword.length()>7){
if(newPassword.equals(myLogin.password))
JOptionPane.showMessageDialog(this, "Password already exists!", "Error!", JOptionPane.ERROR_MESSAGE);
else{
String regex = "^(?=.*?\\p{Lu})(?=.*?[\\p{L}&&[^\\p{Lu}]])(?=.*?\\d)" + "(?=.*?[`~!@#$%^&*()\\-_=+\\\\\\|\\[{\\]};:'\",<.>/?]).*$";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(newPassword);
if(m.matches()){
if(newPassword.equals(confirmPassword)){
myLogin.password = newPassword;
FinalLoginForm myLogins = new FinalLoginForm();
myLogins.setVisible(true);
myLogins.setResizable(false);
myLogins.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myLogins.setSize(300,300);
change.setVisible(false);
}
else{
JOptionPane.showMessageDialog(this, "Password does not match!", "Error!", JOptionPane.ERROR_MESSAGE);
}
}
else{
JOptionPane.showMessageDialog(this, "Must have Capital Letter, Small Letter, Number and Special Character!", "Error!", JOptionPane.ERROR_MESSAGE);
}
}
}
else
JOptionPane.showMessageDialog(this, "Must have at least 8 characters!", "Error!", JOptionPane.ERROR_MESSAGE);
}
else
JOptionPane.showMessageDialog(this, "Wrong current password!", "Error!", JOptionPane.ERROR_MESSAGE);
}
}
else
{
FinalLoginForm myLogins = new FinalLoginForm();
myLogins.setVisible(true);
myLogins.setResizable(false);
myLogins.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myLogins.setSize(300,300);
change.setVisible(false);
}
}
}
答案 0 :(得分：1)
主要问题是您在FinalLoginForm中创建了FinalChangePassword的新实例，该实例与原始登录表单或新密码没有上下文或关系。
基本答案是使用模态对话框向用户请求信息，然后根据用户的选择做出决定。
关注代码每个区域的责任，例如，“更改密码”视图可能实际上不负责使用当前密码值验证旧密码值，这应该取决于视图实际上有当前密码（或其他一些验证器）。 “更改密码”视图应侧重于从用户那里获取所需信息。
例如......
public class ChangePasswordPane extends JPanel {
private JPasswordField oldPassword;
private JPasswordField newPassword;
public ChangePasswordPane() {
setLayout(new GridBagLayout());
oldPassword = new JPasswordField(20);
newPassword = new JPasswordField(20);
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(2, 2, 2, 2);
gbc.gridx = 0;
gbc.gridy = 0;
add(new JLabel("Old password: "), gbc);
gbc.gridy++;
add(new JLabel("New password: "), gbc);
gbc.gridx++;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridy = 0;
add(oldPassword, gbc);
gbc.gridy++;
add(newPassword, gbc);
}
public char[] getOldPassword() {
return oldPassword.getPassword();
}
public char[] getNewPassword() {
return newPassword.getPassword();
}
}
非常基本。它只是一个JPanel，有两个JPasswordField，一个用于旧密码，一个用于新密码。
现在，我们需要一些方法来实际显示面板并从中获取值...
public class TestPane extends JPanel {
// This is cheat for demonstration purposes, please don't do this
// in production
private char[] password = "banana".toCharArray();
public TestPane() {
setLayout(new GridBagLayout());
JButton btn = new JButton("Change password");
btn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
ChangePasswordPane pane = new ChangePasswordPane();
switch (JOptionPane.showConfirmDialog(TestPane.this, pane, "Change Password", JOptionPane.PLAIN_MESSAGE, JOptionPane.OK_CANCEL_OPTION)) {
case JOptionPane.OK_OPTION:
char[] oldPassword = pane.getOldPassword();
if (Arrays.equals(password, oldPassword)) {
password = pane.getNewPassword();
JOptionPane.showMessageDialog(TestPane.this, "Password was changed");
} else {
JOptionPane.showMessageDialog(TestPane.this, "Password mismatch, your old password does not match your current password");
}
break;
}
}
});
add(btn);
}
}
现在，这只是使用JOptionPane来显示ChangePasswordPane，但如果您愿意，也可以创建自己的JDialog。这会提示用户输入旧密码和新密码，当用户按下[Okay]时，验证它们