@RequestMapping("/getVerifyCode ")
public void getVerificationCode(HttpServletResponse response,HttpServletRequest request) {
try {
int width=200;
int height=69;
BufferedImage verifyImg=new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
String randomText = VerifyCode.drawRandomText(width,height,verifyImg);
request.getSession().setAttribute("verifyCode", randomText);
response.setContentType("image/png");
OutputStream os = response.getOutputStream();
ImageIO.write(verifyImg,"png",os);
os.flush();
os.close();
} catch (IOException e) {
this.logger.error(e.getMessage());
e.printStackTrace();
}
}
public class VerifyCode {
public static String drawRandomText(int width,int height,BufferedImage verifyImg) {
Graphics2D graphics = (Graphics2D)verifyImg.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, width, height);
graphics.setFont(new Font("微软雅黑", Font.BOLD, 40));
String baseNumLetter= = "123456789abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ";
StringBuffer sBuffer = new StringBuffer();
int x = 10;
String ch = "";
Random random = new Random();
for(int i = 0;i < 4;i++){
graphics.setColor(getRandomColor());
int degree = random.nextInt() % 30;
int dot = random.nextInt(baseNumLetter.length());
ch = baseNumLetter.charAt(dot) + "";
sBuffer.append(ch);
graphics.rotate(degree * Math.PI / 180, x, 45);
graphics.drawString(ch, x, 45);
graphics.rotate(-degree * Math.PI / 180, x, 45);
x += 48;
}
for (int i = 0; i <6; i++) {
graphics.setColor(getRandomColor());
graphics.drawLine(random.nextInt(width), random.nextInt(height),
random.nextInt(width), random.nextInt(height));
}
for(int i=0;i<30;i++){
int x1 = random.nextInt(width);
int y1 = random.nextInt(height);
graphics.setColor(getRandomColor());
graphics.fillRect(x1, y1, 2,2);
}
return sBuffer.toString();
}
private static Color getRandomColor() {
Random ran = new Random();
Color color = new Color(ran.nextInt(256),
ran.nextInt(256), ran.nextInt(256));
return color;
}
}