H5游戏接微信小游戏的支付,满满的都是坑!

h5小游戏接微信的支付,简直是在为难我胖虎,说多了都是泪。
  准备工作:
    准备工作一定要做好,不然很容易出错。首先是session_key这个字段,这个session_key是登录的时候需要用到的,根据code从wx.login获取到。登录成功后直接用客户端保存起来,后面支付的时候要用来签名。

    其次是access_token,这个access_token不是登陆验证用到的那个,我们先看看微信文档里面怎么说。

  是不是很坑,但是支付的时候签名必须要access_token。首先我想到的是存到数据库中,后来我写到监听器中了,但是不知道对不对,代码如下:

    private static String weixin_token = "";

    private static Long weixin_token_time = System.currentTimeMillis();

    private final static String appId = ConfigHolder.getConfig().getString("gmweb.weixin.AppId");

    private final static String secret = ConfigHolder.getConfig().getString("gmweb.weixin.Secret");

    public static String getWeixinToken() throws Exception{
        boolean is = true;
        if(weixin_token == null || weixin_token.equals("")){
            is = false;
        }
        if((System.currentTimeMillis()-weixin_token_time)/1000>3600){
            is = false;
        }
        if(!is){
            ObjectMapper mapper = new ObjectMapper();
            String tokenUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appId+"&secret="+secret+"";
            String tokenResult = HttpUtils.sendHttpGet(tokenUrl);
            if(tokenResult!=null&&!tokenResult.equals("")){
                Map map = mapper.readValue(tokenResult, Map.class);
                if(map!=null&&map.size()>0){
                    weixin_token = (String)map.get("access_token");
                    weixin_token_time = System.currentTimeMillis();
                }
            }
        }
        return weixin_token;
    }

    不管哪里用到access_token,都从getWeixinToken()这里面拿,保证唯一性(注意我这里是每隔1个小时拿一次)。好的access_token准备完毕,还剩下米大师签名这个密钥。这个也很坑,其实这个字段就是微信给你的沙箱appkey。

=========================================================================================================================================================好的准备工作完毕:三个字段 session_key、access_toke、米大师密钥

=========================================================================================================================================================

接下来就按照文档进行验证了,小心点一般都没问题(PS:签名的时候参数是按照scii码来进行签名的)

1、从前端获取参数

2、米大师签名,mp_sig签名

  注意这里面坑也不少。

  先贴代码:

         token = StartupListener.getWeixinToken();
     String signStr = "amt=" + amt +"&appid=" + appid + "&bill_no=" + bill_no + "&offer_id=" + offer_id + "&openid=" + openid + "&pf=" + pf + "&ts=" + ts + "&zone_id=" + zone_id + "&org_loc=/cgi-bin/midas/sandbox/pay&method=POST&secret=" + miDaShi;; String sign = HmacSHA256.sha256_HMAC(signStr, miDaShi); String mp_signStr = "access_token="+token+"&amt="+amt+"&appid="+appid + "&bill_no=" + bill_no + "&offer_id="+offer_id+"&openid="+openid+"&pf="+pf+ "&sig="+sign+"&ts="+ts+"&zone_id="+zone_id+ "&org_loc=/cgi-bin/midas/sandbox/pay&method=POST&session_key="+sessionKey; String mp_sign = HmacSHA256.sha256_HMAC(mp_signStr, sessionKey);

  

  附上sha256_HMAC代码

public static String sha256_HMAC(String message, String secret) {
        String hash = "";
        try {
            Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
            SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
            sha256_HMAC.init(secret_key);
            byte[] bytes = sha256_HMAC.doFinal(message.getBytes());
            hash = byteArrayToHexString(bytes);
            System.out.println(hash);
        }
        catch (Exception e) {
            System.out.println("Error HmacSHA256 ===========" + e.getMessage());
        }
        return hash;
    }

3、发送请求

  好吧,发送请求我也遇到个坑,如果参数不是按照json格式发送,会提示参数缺失。

  

        Map<String,Object> param = new HashMap<String,Object>();
        param.put("openid", openid);
        param.put("appid", appid);
        param.put("offer_id", offer_id);
        param.put("ts", Long.valueOf(ts));
        param.put("zone_id", zone_id);
        param.put("pf", pf);
        param.put("amt", amt);
        param.put("bill_no", bill_no);
        param.put("sig", sign);
        param.put("mp_sig", mp_sign);
        String signResult=HttpUtils.sendHttpPost4(sandUrl+"?"+"access_token="+token, param);  //sandUlr:https://api.weixin.qq.com/cgi-bin/midas/sandbox/pay

  另外附上sendHttpPost4的代码

public static String sendHttpPost4(String URL, Map<String, Object> map) {
        try {
            URL url = new URL(URL);
            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setRequestMethod("POST");
            connection.setUseCaches(false);
            connection.setInstanceFollowRedirects(true);
            connection.setRequestProperty("connection", "Keep-Alive");
            // connection.setRequestProperty("Content-Type",
            // "text/plain; charset=utf-8");
            connection.connect();
            // POST请求
            DataOutputStream out = new DataOutputStream(
                    connection.getOutputStream());
            JSONObject obj = new JSONObject();
            for (Map.Entry<String, Object> entry : map.entrySet()) {

                obj.element(entry.getKey(), entry.getValue());

            }
            log.info("pay json is "+obj.toString());
            out.writeBytes(obj.toString());
            out.flush();
            out.close();
            // 读取响应
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String lines;
            StringBuffer sb = new StringBuffer("");
            while ((lines = reader.readLine()) != null) {
                lines = new String(lines.getBytes(), "utf-8");
                sb.append(lines);
            }
            //System.out.println(sb);
            reader.close();
            connection.disconnect();
            return sb.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }

    }

最后就是解析signResult了,根据返回信息判断是否成功。以上!

猜你喜欢

转载自www.cnblogs.com/yzdtofly/p/9402782.html
今日推荐