本文實例為大家分享了Swing實現可動態刷新的驗證碼的具體代碼，供大家參考，具體內容如下
不多，code代碼如下：
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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;//驗證碼寬度 private int height =25;//驗證碼高度 private int font_size = 20;//驗證碼顏色 private int x = 100;//驗證碼所在窗體X坐標 private int y = 100;//驗證碼所在窗體Y坐標 private int jam = 5;//干擾元素 建議使用 4~7 之間的數字 private String code = "";//保存驗證碼 public CheckCode(){//初始化窗體信息 super("驗證碼"); 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(){//獲得隨機顏色 int R=random.nextInt(255),G=random.nextInt(255),B=random.nextInt(255); return new Color(R,G,B); } public String getRandomString(){//獲得驗證碼 int num = random.nextInt(9); code = num+""; return num+""; } public void checkCode(Graphics g){// 繪畫驗證碼 drawBorder(g); drawCode(g); drawJam(g); } public void drawBorder(Graphics g){//繪畫邊框和背景 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){//繪畫驗證碼內容 Color gc = g.getColor(); for(int i=0;i<4;i++){ g.setColor(getRandomColor()); g.setFont(new Font("宋體",Font.BOLD,font_size)); g.drawString(getRandomString(), x+5+(i*12), y+font_size); } g.setColor(gc); } public void drawJam(Graphics g){//繪畫干擾元素 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("單擊可刷新驗證碼", 30, 50); checkCode(g); g.setColor(c); } public static void main(String[] args) { new CheckCode(); } } |
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
