@CrossOrigin
    @RequestMapping(value="/login",produces={"application/json;charset=UTF-8"})
    public void login(HttpServletRequest request, String code, HttpServletResponse response) {
        //设置默认密码和用户名
        try {
            String access_token = checkUser.getAccess_token(appKey,appSecret);
            String unionId = checkUser.getUserInfoBycode(code, scanAppId, scanAppSecret);
            OapiUserGetUseridByUnionidResponse response_unionid = checkUser.getUserInfoByUnionid(access_token,unionId);
            if(response_unionid.getErrcode() == 0) {
                request.getSession().setAttribute("token", "access");

                OapiUserGetResponse response_userinfo = checkUser.getUserInfoByUserId(access_token,response_unionid.getUserid());
                String userName = response_userinfo.getName();
                String mail = response_userinfo.getEmail();
                String tel = response_userinfo.getTel();
                String userId = response_userinfo.getUserid();
                String ip = request.getRemoteAddr();//返回发出请求的IP地址
                LoginEntity le = new LoginEntity();
                le.setUserName(userName);
                le.setMail(mail);
                le.setTel(tel);
                le.setUserId(userId);
                le.setCreateTime(new Date());
                le.setRemoteIp(ip);
                le.setOperateType(EnumLoginOperateType.login.getStatus());
                iLoginService.loginRecord(le);
                String avatar = response_userinfo.getAvatar();
                request.getSession().setAttribute("userName", userName);
                request.getSession().setAttribute("avatar", avatar);
                request.getSession().setMaxInactiveInterval(120*60);//以秒为单位，即在没有活动120分钟后，session将失效
                response.sendRedirect("/index.html");
            }else {
                response.sendRedirect("/login.html#fail");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

参考：https://www.cnblogs.com/diewufeixian/p/4221747.html