@Controller
public class Login2Controller {
private static ConfigurableCaptchaService cs = new ConfigurableCaptchaService();
private static Random random = new Random();
static {
cs.setColorFactory(new ColorFactory() {
@Override
public Color getColor(int x) {
int[] c = new int[3];
int i = random.nextInt(c.length);
for (int fi = 0; fi < c.length; fi++) {
if (fi == i) {
c[fi] = random.nextInt(71);
} else {
c[fi] = random.nextInt(256);
}
}
return new Color(c[0], c[1], c[2]);
}
});
RandomWordFactory wf = new RandomWordFactory();
wf.setCharacters("23456789abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ");
wf.setMaxLength(4);
wf.setMinLength(4);
cs.setWordFactory(wf);
}
@RequestMapping("/pcrimg")
public void crimg(HttpServletRequest request, HttpServletResponse response) throws IOException {
switch (random.nextInt(5)) {
case 0:
cs.setFilterFactory(new CurvesRippleFilterFactory(cs.getColorFactory()));
break;
case 1:
cs.setFilterFactory(new MarbleRippleFilterFactory());
break;
case 2:
cs.setFilterFactory(new DoubleRippleFilterFactory());
break;
case 3:
cs.setFilterFactory(new WobbleRippleFilterFactory());
break;
case 4:
cs.setFilterFactory(new DiffuseRippleFilterFactory());
break;
}
HttpSession session = request.getSession(false);
if (session == null) {
session = request.getSession();
}
setResponseHeaders(response);
String token = EncoderHelper.getChallangeAndWriteImage(cs, "png", response.getOutputStream());
session.setAttribute("captchaToken", token);
System.out.println("当前的SessionID=" + session.getId() + "，验证码=" + token);
}
protected void setResponseHeaders(HttpServletResponse response) {
response.setContentType("image/png");
response.setHeader("Cache-Control", "no-cache, no-store");
response.setHeader("Pragma", "no-cache");
long time = System.currentTimeMillis();
response.setDateHeader("Last-Modified", time);
response.setDateHeader("Date", time);
response.setDateHeader("Expires", time);
}
}