private String getCaptcha() { GeetestLib geetest = new GeetestLib(); geetest.CaptchaID = GeetestConfig.publicKey; geetest.PrivateKey = GeetestConfig.privateKey; geetest.setGtSession(Session); String resStr = ""; if (geetest.preProcess()) { resStr = geetest.getSuccessPreProcessRes(); geetest.setGtServerStatusSession(Session, 1); } else { resStr = geetest.getFailPreProcessRes(); geetest.setGtServerStatusSession(Session, 0); } return(resStr); }