Java는 동적 사진 확인 코드를 구현합니다.

int width = 100; int height = 50;

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

Graphics g = image.getGraphics(); g.setColor(Color.WHITE); g.fillRect(0, 0, width, height); g.setColor(Color.BLACK); g.drawRect(0, 0, width - 1, height - 1);

//字符集 String str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefgjijklmnopqrstuvwxyz"; //随机数 Random ran = new Random();

private Color getRandomColor(Random random) { //获取随机颜色 int colorIndex = random.nextInt(3); switch (colorIndex) { case 0: return Color.BLUE; case 1: return Color.GREEN; case 2: return Color.RED; case 3: return Color.YELLOW; default: return Color.MAGENTA; } }

//绘制验证码 for (int i = 0; i < 4; i++) { //获取随机字符 int index = ran.nextInt(str.length()); char ch = str.charAt(index); //获取随机色 Color randomColor = getRandomColor(ran); g.setColor(randomColor); //设置字体 Font font = new Font("宋体", Font.BOLD, height / 2); g.setFont(font); //写入验证码 g.drawString(ch + "", (i == 0) ? width / 4 * i + 2 : width / 4 * i, height - height / 4); }

//干扰线 for (int i = 0; i < 10; i++) { int x1 = ran.nextInt(width); int x2 = ran.nextInt(width); int y1 = ran.nextInt(height); int y2 = ran.nextInt(height); Color randomColor = getRandomColor(ran); g.setColor(randomColor); g.drawLine(x1, x2, y1, y2); }

ImageIO.write(image, "jpg", resp.getOutputStream());

 看不清，换一张