526互联

星期四

发布时间 2023-09-15 17:02:54作者: umiQa
改了一下验证码的代码，加了输入错误刷新图片，文字大小，颜色随机，随机小幅度旋转
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.geom.AffineTransform;
import java.awt.image.*;
import java.awt.image.renderable.RenderableImage;
import java.text.AttributedCharacterIterator;
import java.util.Map;
import java.util.Random;

public class VerificationCode extends JFrame {
private String code = "";
private JTextField codeText;
private JButton button1;

VerificationCode() {
super();
setResizable(false);
setTitle("Java实现验证码功能");
setBounds(750, 400, 600, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.setLayout(null);
getContentPane().add(panel, BorderLayout.CENTER);
JLabel label1 = new JLabel();
label1.setText("验证码：");
label1.setBounds(10, 100, 50, 20);
panel.add(label1);
JTextField codeText = new JTextField();
codeText.setBounds(60, 100, 100, 20);
panel.add(codeText);
JButton button1 = new JButton("确定");
button1.setBounds(60, 140, 80, 20);
panel.add(button1);
button1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String info = "";
if (!codeText.getText().equalsIgnoreCase(code)) {
info = "验证码错误";
code="";
draw();
}
else
System.exit(0);
JOptionPane.showMessageDialog(null, info);
}
});
}

public void paint(Graphics g){
BufferedImage image = new BufferedImage(200, 100, 1);
Graphics2D graphics = image.createGraphics();
AffineTransform transform=new AffineTransform();
Stroke stroke = new BasicStroke(2.0f);
Random r = new Random();
for (int i = 1; i <= 8; i++) {
char c;
double a;
String C="";
switch (r.nextInt(2) + 1) {
case 1:
c = (char)(r.nextInt(9) + 48);
C+=c;
a=(r.nextInt(90)+315)*3.14/180;
graphics.setStroke(stroke);
graphics.setColor(new Color(r.nextInt()));
graphics.setFont(new Font("仿宋",Font.BOLD,r.nextInt(10)+20));
transform.rotate(a,i*20,50);
graphics.setTransform(transform);
graphics.drawString(C, i * 20, 50);
transform.rotate(-a,i*20,50);
graphics.setTransform(transform);
code += c;
break;
case 2:
a=(r.nextInt(90)+315)*3.14/180;
c = (char) (r.nextInt(26) + 65);
graphics.setStroke(stroke);
graphics.setColor(new Color(r.nextInt()));
graphics.setFont(new Font("仿宋",Font.BOLD,r.nextInt(10)+20));
transform.rotate(a,i*20,50);
graphics.setTransform(transform);
graphics.drawString(C+c, i * 20, 50);
graphics.setTransform(new AffineTransform());
transform.rotate(-a,i*20,50);
graphics.setTransform(transform);
code += c;
break;
}
}
g.drawImage(image, 40, 20, null);
}
public void draw()
{
repaint();
}
public static void main(String[] args) {
VerificationCode frame = new VerificationCode();
frame.setVisible(true);
}
}