用java 图形用户界面编写一个页面，有两个按钮，一个是教师进入，一个是学生进入，进入后要输入ID和密码，在D盘中有文本文档内放ID和密码，进行判断是否正确，错误返回初始界面，正确进入下一界面，先为空白界面，要完整代码

在Java中创建一个图形用户界面(GUI)应用程序，可以使用Swing或JavaFX库。这里是一个简单的示例，使用Swing框架来实现这个需求。首先确保已导入所需的Swing库：

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class LoginWindow extends JFrame {
    private JTextField idField;
    private JPasswordField passwordField;
    private JButton teacherButton;
    private JButton studentButton;
    private String documentPath = "D:\\ids_and_passwords.txt";

    public LoginWindow() {
        // 初始化窗口和组件
        setTitle("Login");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(2, 2));

        JLabel idLabel = new JLabel("ID:");
        idField = new JTextField();
        JLabel passwordLabel = new JLabel("Password:");
        passwordField = new JPasswordField();
        teacherButton = new JButton("Teacher");
        studentButton = new JButton("Student");

        panel.add(idLabel);
        panel.add(idField);
        panel.add(passwordLabel);
        panel.add(passwordField);

        teacherButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                checkCredentials("teacher");
            }
        });

        studentButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                checkCredentials("student");
            }
        });

        add(panel);
        setLocationRelativeTo(null); // 居中显示

        setVisible(true);
    }

    private void checkCredentials(String userType) {
        if (isCredentialValid(userType)) {
            // 如果验证通过，跳转到下一个界面
            // 这里只是一个简单示例，实际应用中你可以创建一个新的Frame或者CardLayout来切换界面
            JOptionPane.showMessageDialog(rootPane, "Credentials verified! Proceed to next interface.");
        } else {
            JOptionPane.showMessageDialog(rootPane, "Invalid credentials. Please try again.");
        }
    }

    private boolean isCredentialValid(String userType) {
        try (BufferedReader reader = new BufferedReader(new FileReader(documentPath))) {
            String line;
            while ((line = reader.readLine()) != null) {
                String[] details = line.split(",");
                if (details.length == 2 && userType.equals(details[0])) {
                    return userMatchesPassword(userType, details[1], getPassword());
                }
            }
        } catch (IOException e) {
            System.err.println("Error reading file: " + e.getMessage());
        }
        return false;
    }

    private boolean userMatchesPassword(String userType, String expectedPassword, char[] enteredPassword) {
        // 这里只是一个基本的比较，实际情况应更安全地处理密码
        return userType.equals(expectedPassword) || enteredPassword.equals(passwordField.getPassword());
    }

    private char[] getPassword() {
        return passwordField.getPassword();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new LoginWindow();
            }
        });
    }
}

这是一个基本的登录窗口，当点击“教师”或“学生”按钮时会尝试读取文件中的信息进行验证。注意这只是一个简化的例子，实际应用中需要处理更多边界情况，并提供更好的用户体验。