生成验证码的Java程序
package lll; import java.util.Random; public class VerificationCodeGenerator { public static void main(String[] args) { String verificationCode = generateVerificationCode(6); System.out.println("验证码:" + verificationCode); } public static String generateVerificationCode(int length) { String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; Random random = new Random(); StringBuilder verificationCode = new StringBuilder(); for (int i = 0; i < length; i++) { int index = random.nextInt(characters.length()); verificationCode.append(characters.charAt(index)); } return verificationCode.toString(); } }
package lll; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; public class VerificationCodeGeneratorGUI extends JFrame { private JTextField lengthTextField; private JLabel verificationCodeLabel; public VerificationCodeGeneratorGUI() { setTitle("验证码生成器"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(300, 200); JPanel mainPanel = new JPanel(); mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS)); mainPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10)); JPanel lengthPanel = new JPanel(new FlowLayout(FlowLayout.LEFT)); lengthPanel.add(new JLabel("验证码长度:")); lengthTextField = new JTextField(10); lengthPanel.add(lengthTextField); mainPanel.add(lengthPanel); JPanel generatePanel = new JPanel(new FlowLayout(FlowLayout.LEFT)); JButton generateButton = new JButton("生成验证码"); generateButton.addActionListener(new GenerateButtonListener()); generatePanel.add(generateButton); mainPanel.add(generatePanel); JPanel verificationCodePanel = new JPanel(new FlowLayout(FlowLayout.LEFT)); verificationCodePanel.add(new JLabel("验证码:")); verificationCodeLabel = new JLabel(); verificationCodePanel.add(verificationCodeLabel); mainPanel.add(verificationCodePanel); add(mainPanel); setVisible(true); } private class GenerateButtonListener implements ActionListener { @Override public void actionPerformed(ActionEvent e) { int length = Integer.parseInt(lengthTextField.getText()); String verificationCode = generateVerificationCode(length); verificationCodeLabel.setText(verificationCode); } } public static String generateVerificationCode(int length) { String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; Random random = new Random(); StringBuilder verificationCode = new StringBuilder(); for (int i = 0; i < length; i++) { int index = random.nextInt(characters.length()); verificationCode.append(characters.charAt(index)); } return verificationCode.toString(); } public static void main(String[] args) { new VerificationCodeGeneratorGUI(); } }
module dada { requires java.desktop; }
标签:String,9.17,JPanel,add,verificationCode,new,public From: https://www.cnblogs.com/jais/p/17709966.html