session

public void sendCodeMsg(HttpServletRequest request, String mobile) throws Exception {
    String code = "" + (int) ((Math.random() * 9.0D + 1.0D) * 100000.0D);//获取随机6位数
    this.sendMsg(mobile, String.format(SmsParamConfigure.Code_Content, new Object[] { code })); //通过短信接口发送短信验证码
    logger.info("电话号码" + mobile + "; 验证码:" + code); //输出短信信息
    request.getSession().setAttribute(Check_Code + mobile, code); //在session中加入相应的手机号 和 验证码
}

session.removeAttribute(Check_Code + mobile); //移除session中对应的值