2.110获取微信小程序数据，返回给后台

后台程序要提交的登录信息

String WECHAT_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

后台程序的值注入

• 打开application.yml文件，添加小程序的app-id 和 app-secret

    @Override
    public Map<String, Object> wxLogin(WechatLoginDTO dto) {
        HashMap map = new HashMap();
        map.put("appid", appId); //app_id
        map.put("secret", appSecret); //app_secret
        map.put("js_code", dto.getCode()); //微信code
        map.put("grant_type", "authorization_code"); // 默认参数
        String response = HttpUtil.post(UrlConstant.WECHAT_LOGIN, map);
        JSONObject json = JSONUtil.parseObj(response);
        String openId = json.get("openid", String.class);
        String sessionKey = json.get("session_key", String.class);
//        System.out.println(openId);
//        System.out.println(sessionKey);
        if (openId == null || openId.length() == 0) {
            throw new RenException("open_id不存在");
        }
        UserEntity user = new UserEntity();
        user.setOpenId(openId);
        QueryWrapper wrapper = new QueryWrapper();
        wrapper.setEntity(user);
        int count = baseDao.selectCount(wrapper);
        System.out.println(count);
        if (count == 0) {
            user = new UserEntity();
            user.setOpenId(openId);
            user.setNickName(dto.getNickName());
            user.setPhoto(dto.getPhoto());
            user.setCreateDate(new Date());
            baseDao.insert(user);
        }
        user = new UserEntity();
        user.setOpenId(openId);
        wrapper = new QueryWrapper(user);
        user = baseDao.selectOne(wrapper);
        //获取登录token
        TokenEntity tokenEntity = tokenService.createToken(user.getId());
        Map<String, Object> map2 = new HashMap<>(2);
        map2.put("token", tokenEntity.getToken());
        map2.put("expire", tokenEntity.getExpireDate().getTime() - System.currentTimeMillis());
        return map;
    }