rsa加解密 java 用图形用户界面

为了实现RSA加解密的图形用户界面，需要使用Java图形界面工具包（Java Swing）来创建窗口和组件。以下是一个简单的RSA加解密GUI示例：

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Security;

import javax.crypto.Cipher;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class RSAGUI implements ActionListener {
    private JFrame frame;
    private JTextField publicKeyField;
    private JTextField privateKeyField;
    private JTextArea inputArea;
    private JTextArea outputArea;
    private JButton encryptButton;
    private JButton decryptButton;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    RSAGUI window = new RSAGUI();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public RSAGUI() {
        initialize();
    }

    private void initialize() {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        frame = new JFrame();
        frame.setBounds(100, 100, 600, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        frame.getContentPane().add(panel, BorderLayout.CENTER);
        panel.setLayout(null);

        JLabel publicKeyLabel = new JLabel("Public Key:");
        publicKeyLabel.setBounds(10, 10, 80, 20);
        panel.add(publicKeyLabel);

        publicKeyField = new JTextField();
        publicKeyField.setBounds(100, 10, 400, 20);
        publicKeyField.setEditable(false);
        panel.add(publicKeyField);

        JLabel privateKeyLabel = new JLabel("Private Key:");
        privateKeyLabel.setBounds(10, 40, 80, 20);
        panel.add(privateKeyLabel);

        privateKeyField = new JTextField();
        privateKeyField.setBounds(100, 40, 400, 20);
        privateKeyField.setEditable(false);
        panel.add(privateKeyField);

        JLabel inputLabel = new JLabel("Input:");
        inputLabel.setBounds(10, 70, 80, 20);
        panel.add(inputLabel);

        inputArea = new JTextArea();
        inputArea.setBounds(100, 70, 400, 100);
        panel.add(inputArea);

        JLabel outputLabel = new JLabel("Output:");
        outputLabel.setBounds(10, 190, 80, 20);
        panel.add(outputLabel);

        outputArea = new JTextArea();
        outputArea.setBounds(100, 190, 400, 100);
        outputArea.setEditable(false);
        panel.add(outputArea);

        encryptButton = new JButton("Encrypt");
        encryptButton.setBounds(100, 310, 100, 30);
        encryptButton.addActionListener(this);
        panel.add(encryptButton);

        decryptButton = new JButton("Decrypt");
        decryptButton.setBounds(220, 310, 100, 30);
        decryptButton.addActionListener(this);
        panel.add(decryptButton);

        try {
            // 生成RSA密钥对
            KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");
            generator.initialize(2048);
            KeyPair keyPair = generator.generateKeyPair();
            PrivateKey privateKey = keyPair.getPrivate();
            PublicKey publicKey = keyPair.getPublic();
            publicKeyField.setText(publicKey.toString());
            privateKeyField.setText(privateKey.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void actionPerformed(ActionEvent e) {
        try {
            if (e.getSource() == encryptButton) {
                // 使用公钥加密数据
                Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
                cipher.init(Cipher.ENCRYPT_MODE, publicKeyField.getText());
                byte[] input = inputArea.getText().getBytes();
                byte[] cipherText = cipher.doFinal(input);
                outputArea.setText(new String(cipherText));
            } else if (e.getSource() == decryptButton) {
                // 使用私钥解密数据
                Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
                cipher.init(Cipher.DECRYPT_MODE, privateKeyField.getText());
                byte[] cipherText = inputArea.getText().getBytes();
                byte[] plainText = cipher.doFinal(cipherText);
                outputArea.setText(new String(plainText));
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

在上面的示例中，通过调用`initialize()`方法创建了一个包含公钥、私钥、输入、输出和加密、解密按钮的窗口。单击加密按钮将使用公钥加密输入区域中的文本，并将结果显示在输出区域中。单击解密按钮将使用私钥解密输入区域中的文本，并将结果显示在输出区域中。需要注意的是，上面的示例中使用的是Bouncy Castle作为Java加密扩展提供者，需要将Bouncy Castle库添加到项目中才能正常运行。