package test; 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 = 4; //干扰元素 建议使用 4~7 之间的数字 private String code = ""; //保存验证码
/** * 初始化窗体信息 */
public CheckCode(){ super("test"); setVisible(true); setBounds((Toolkit.getDefaultToolkit().getScreenSize().width-300)/2, (Toolkit.getDefaultToolkit().getScreenSize().height-300)/2, 300, 200); setDefaultCloseOperation(EXIT_ON_CLOSE); addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { repaint(); } }); } /** * 获得随机颜色 * @return 随即颜色 */
public Color getRandomColor(){ int R=random.nextInt(255),G=random.nextInt(255),B=random.nextInt(255); return new Color(R,G,B); }
/** * 获得验证码 * @return 验证码 */
public String getRandomString(){ int num = random.nextInt(9); code = num+""; return num+""; }
/** * 绘画验证码 * @param g */
public void checkCode(Graphics g){ drawBorder(g); drawCode(g); drawJam(g); }
/** * 绘画边框和背景 * Java中文网 * http://www.javaweb.cc */
public void drawBorder(Graphics g){ 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);
}
/** * 绘画验证码内容 * Java教程 * http://www.javaweb.cc */
public void drawCode(Graphics g){ 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); }
/** * 绘画干扰元素 * Java中文网 * http://www.javaweb.cc */
public void drawJam(Graphics g){ 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("看不清?单机窗体更换验证码", 30, 50); checkCode(g); g.setColor(c);
} public static void main(String[] args) { new Test02(); } }
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