public class ImageUtils {
public static ImageCode crateImageCode() {
int width = 100;
int height = 49;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);//图形构件
Graphics2D g = image.createGraphics();
Random random = new Random();
g.setColor(getRandColor(200, 250));//背景颜色
g.fillRect(0, 0, width, height);//填充一个矩形
g.setFont(new Font("Times New Roman", Font.BOLD, 25));//设置字体风格
g.setColor(getRandColor(150, 200));//设置线条颜色
g.setStroke(new BasicStroke(3.0f));
//生成线条
for (int i = 0; i < 40; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(50);
int yl = random.nextInt(50);
g.drawLine(x, y, x + xl, y + yl);
}
StringBuilder sRand = new StringBuilder();
//生成随机的字母加数字的验证码
for (int i = 0; i < 5; i++) {
String rand = "";
String charOrNum = random.nextInt(10) % 2 == 0 ? "char" : "num";
//输出字母还是数字
if("char".equalsIgnoreCase(charOrNum)) {
//输出是大写字母还是小写字母
int temp = random.nextInt(10) % 2 == 0 ? 65 : 97;
rand = String.valueOf((char)(random.nextInt(26) + temp));
}else if( "num".equalsIgnoreCase(charOrNum) ) {
rand = String.valueOf(random.nextInt(10));
}
sRand.append(rand);
g.setColor(getRandColor(100, 150));
g.drawString(rand, 16 * i + 10, 27);
}
g.dispose();
return new ImageCode(image, sRand.toString(), 300);
}
private static Color getRandColor(int fc, int bc) {
Random random = new Random();
if (fc > 255) {
fc = 255;
}
if (bc > 255) {
bc = 255;
}
int r = fc + random.nextInt(bc - fc);
int g = fc + random.nextInt(bc - fc);
int b = fc + random.nextInt(bc - fc);
return new Color(r, g, b);
}
}
简单一个图形验证码生成类
最新推荐文章于 2025-03-16 22:45:25 发布