Swing图形界面实现可动态刷新的验证码_JAVA教程

Swing图形界面实现可动态刷新的验证码

2020-09-30 15:59Joker_Ye JAVA教程

这篇文章主要为大家详细介绍了Swing图形界面实现可动态刷新的验证码，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了Swing实现可动态刷新的验证码的具体代码，供大家参考，具体内容如下

不多，code代码如下：

									import java.awt.Color; 

									import java.awt.Font; 

									import java.awt.Graphics; 

									import java.awt.Toolkit; 

									import java.awt.event.MouseAdapter; 

									import java.awt.event.MouseEvent; 

									import java.util.Random; 

									import javax.swing.JFrame; 

									public class CheckCode extends JFrame { 

									private static Random random = new Random(); 

									private int width = 53;//验证码宽度 

									private int height =25;//验证码高度 

									private int font_size = 20;//验证码颜色 

									private int x = 100;//验证码所在窗体X坐标 

									private int y = 100;//验证码所在窗体Y坐标 

									private int jam = 5;//干扰元素 建议使用 4~7 之间的数字 

									private String code = "";//保存验证码 

									public CheckCode(){//初始化窗体信息 

									super("验证码"); 

									setVisible(true); 

									setBounds((Toolkit.getDefaultToolkit().getScreenSize().width-300)/2, (Toolkit.getDefaultToolkit().getScreenSize().height-300)/2, 300, 200); 

									setDefaultCloseOperation(EXIT_ON_CLOSE); 

									addMouseListener(new MouseAdapter() { 

									public void mouseClicked(MouseEvent e) { 

									repaint(); 

									} 

									}); 

									} 

									public Color getRandomColor(){//获得随机颜色 

									int R=random.nextInt(255),G=random.nextInt(255),B=random.nextInt(255); 

									return new Color(R,G,B); 

									} 

									public String getRandomString(){//获得验证码 

									int num = random.nextInt(9); 

									code = num+""; 

									return num+""; 

									} 

									public void checkCode(Graphics g){// 绘画验证码 

									drawBorder(g);  

									drawCode(g); 

									drawJam(g); 

									} 

									public void drawBorder(Graphics g){//绘画边框和背景 

									Color gc = g.getColor(); 

									g.setColor(Color.WHITE); 

									g.fillRect(x, y, width, height); 

									g.setColor(Color.BLACK); 

									g.drawRect(x, y, width, height); 

									g.setColor(gc); 

									} 

									public void drawCode(Graphics g){//绘画验证码内容 

									Color gc = g.getColor(); 

									for(int i=0;i<4;i++){ 

									g.setColor(getRandomColor()); 

									g.setFont(new Font("宋体",Font.BOLD,font_size)); 

									g.drawString(getRandomString(), x+5+(i*12), y+font_size); 

									} 

									g.setColor(gc); 

									} 

									public void drawJam(Graphics g){//绘画干扰元素 

									Color gc = g.getColor(); 

									for(int i=0;i<jam;i++){ 

									g.setColor(getRandomColor()); 

									g.drawLine(x+random.nextInt(width), y+random.nextInt(height), x+random.nextInt(width), y+random.nextInt(height)); 

									} 

									g.setColor(gc); 

									} 

									public void paint(Graphics g) { 

									Color c = g.getColor(); 

									g.drawString("单击可刷新验证码", 30, 50); 

									checkCode(g); 

									g.setColor(c); 

									} 

									public static void main(String[] args) { 

									new CheckCode(); 

									} 

									}