微信掃碼支付(模式一)

微信掃碼支付遇到的問題

• 原生支付URL參數(shù)錯(cuò)誤

• 回調(diào)接口URL有回調(diào)，但是接收不到參數(shù)

• 商戶后臺(tái)返回的數(shù)據(jù)字段結(jié)構(gòu)不合法

• 獲取商戶訂單信息超時(shí)或者商戶返回的httpcode非200

解決問題

• 原生支付URL參數(shù)錯(cuò)誤
  這個(gè)錯(cuò)誤一般會(huì)出現(xiàn)在獲取到二維碼URL之后生成二維碼微信掃碼的時(shí)候。如果你出現(xiàn)此類型的問題請檢查

1、生成二維碼所需參數(shù)列表中參數(shù)是否有錯(cuò)誤（區(qū)分大小寫）
2、參數(shù)中簽名sign時(shí)候正確 簽名算法 ? 簽名校驗(yàn)工具

以下是生成二維碼URL的代碼

/**
?*?
?*?@author?Javen
?*?2016年5月14日
?*?掃碼支付獲取二維碼URL（模式一）
?*/
public?String?getCodeUrl(){
????String?url="weixin://wxpay/bizpayurl?sign=XXXXX&appid=XXXXX&mch_id=XXXXX&product_id=XXXXX&time_stamp=XXXXX&nonce_str=XXXXX";
????String?product_id="001";
????String?timeStamp=Long.toString(System.currentTimeMillis()?/?1000);
????String?nonceStr=Long.toString(System.currentTimeMillis());
????Map<String, String>?packageParams?=?new?HashMap<String, String>();
????packageParams.put("appid",?appid);
????packageParams.put("mch_id",?partner);
????packageParams.put("product_id",product_id);
????packageParams.put("time_stamp",?timeStamp);
????packageParams.put("nonce_str",?nonceStr);
????String?packageSign?=?PaymentKit.createSign(packageParams,?paternerKey);
????return?StringUtils.replace(url,?"XXXXX",?packageSign,appid,partner,product_id,timeStamp,nonceStr);
}

• 回調(diào)接口URL有回調(diào)，但是接收不到參數(shù)

  Enumeration ?en=getParaNames();

  ??while?(en.hasMoreElements())?{
  ??????Object?o=?en.nextElement();
  ??????System.out.println(o.toString()+"="+getPara(o.toString()));
  ??}

以上代碼中輸出的參數(shù)都為NULL

由于官方的文檔描述不是很清楚，大家都以為回調(diào)請求將帶productid和用戶的openid等參數(shù)是以普通的參數(shù)一樣，其實(shí)這個(gè)回調(diào)返回的參數(shù)是一個(gè)XML輸入流

HttpServletRequest?request?=?getRequest();
?????????/**
?????????*?獲取用戶掃描二維碼后，微信返回的信息
?????????*/
????????InputStream?inStream?=?request.getInputStream();
????????ByteArrayOutputStream?outSteam?=?new?ByteArrayOutputStream();
????????byte[]?buffer?=?new?byte[1024];
????????int?len?=?0;
????????while?((len?=?inStream.read(buffer))?!=?-1)?{
????????????outSteam.write(buffer,?0,?len);
????????}
????????outSteam.close();
????????inStream.close();
????????String?result??=?new?String(outSteam.toByteArray(),"utf-8");

result結(jié)果為

<![CDATA[wx201605151311568e801d50fb0555050106]]></prepay_id><br><trade_type><![CDATA[NATIVE]]></trade_type><br><code_url>![CDATA[weixin://wxpay/bizpayurl?pr=Gj3ZF2b]]</code_url><br></xml></p> <p>如果返回的 return_code ?result_code 不為SUCCESS 而回調(diào)的接口沒有返回任何數(shù)據(jù)或者返回的數(shù)據(jù)不合法就會(huì)出現(xiàn)以下錯(cuò)誤</p> <ul class=" list-paddingleft-2"> <li><p>商戶后臺(tái)返回的數(shù)據(jù)字段結(jié)構(gòu)不合法（返回的數(shù)據(jù)包格式不正確）</p></li> <li><p>獲取商戶訂單信息超時(shí)或者商戶返回的httpcode非200（沒有返回的數(shù)據(jù)包）</p></li> </ul> <p>如果以上都沒有問題，就剩下最后一個(gè)步驟了 ?商戶后臺(tái)系統(tǒng)將prepay_id返回給微信支付系統(tǒng) ?以下是詳細(xì)的代碼</p> <pre class="brush:php;toolbar:false">/** ?*?@author?Javen ?*?2016年5月14日 ?*?掃碼支付回調(diào)（模式一） ?*/

public void wxpay(){
? ? ? ?try {
? ? ? ? ? ?HttpServletRequest request = getRequest();
? ? ? ? ? ? /**

?????????*?獲取用戶掃描二維碼后，微信返回的信息
?????????*/
????????InputStream?inStream?=?request.getInputStream();
????????ByteArrayOutputStream?outSteam?=?new?ByteArrayOutputStream();
????????byte[]?buffer?=?new?byte[1024];
????????int?len?=?0;
????????while?((len?=?inStream.read(buffer))?!=?-1)?{
????????????outSteam.write(buffer,?0,?len);
????????}
????????outSteam.close();
????????inStream.close();
????????String?result??=?new?String(outSteam.toByteArray(),"utf-8");

????????System.out.println("callback>>>>"+result);
????????/**
?????????*?獲取返回的信息內(nèi)容中各個(gè)參數(shù)的值
?????????*/
????????Map<String, String>?map?=?PaymentKit.xmlToMap(result);
????????for?(String?key?:?map.keySet())?{
???????????????System.out.println("key=?"+?key?+?"?and?value=?"?+?map.get(key));
????????}

????????String?appid=map.get("appid");
????????String?openid?=?map.get("openid");
????????String?mch_id?=?map.get("mch_id");
????????String?is_subscribe?=?map.get("is_subscribe");
????????String?nonce_str?=?map.get("nonce_str");
????????String?product_id?=?map.get("product_id");
????????String?sign?=?map.get("sign");
????????Map<String, String>?packageParams?=?new?HashMap<String, String>();
????????packageParams.put("appid",?appid);
????????packageParams.put("openid",?openid);
????????packageParams.put("mch_id",mch_id);
????????packageParams.put("is_subscribe",is_subscribe);
????????packageParams.put("nonce_str",nonce_str);
????????packageParams.put("product_id",?product_id);

????????String?packageSign?=?PaymentKit.createSign(packageParams,?paternerKey);
????????//?統(tǒng)一下單文檔地址：https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1

????????Map<String, String>?params?=?new?HashMap<String, String>();
????????params.put("appid",?appid);
????????params.put("mch_id",?mch_id);
????????params.put("body",?"測試掃碼支付");
????????String?out_trade_no=Long.toString(System.currentTimeMillis());
????????params.put("out_trade_no",?out_trade_no);
????????int?price=((int)(Float.valueOf(10)*100));
????????params.put("total_fee",?price+"");
????????params.put("attach",?out_trade_no);

????????String?ip?=?IpKit.getRealIp(getRequest());
????????if?(StrKit.isBlank(ip))?{
????????????ip?=?"127.0.0.1";
????????}

????????params.put("spbill_create_ip",?ip);
????????params.put("trade_type",?TradeType.NATIVE.name());
????????params.put("nonce_str",?System.currentTimeMillis()?/?1000?+?"");
????????params.put("notify_url",?notify_url);
????????params.put("openid",?openid);

????????String?paysign?=?PaymentKit.createSign(params,?paternerKey);
????????params.put("sign",?paysign);

????????String?xmlResult?=?PaymentApi.pushOrder(params);

????????System.out.println("prepay_xml>>>"+xmlResult);

????????/**
?????????*?發(fā)送信息給微信服務(wù)器
?????????*/
????????Map<String, String>?payResult?=?PaymentKit.xmlToMap(xmlResult);

????????String?return_code?=?payResult.get("return_code");
????????String?result_code?=?payResult.get("result_code");

????????if?(StrKit.notBlank(return_code)?&&?StrKit.notBlank(result_code)?&&?return_code.equalsIgnoreCase("SUCCESS")&&result_code.equalsIgnoreCase("SUCCESS"))?{
????????????//?以下字段在return_code?和result_code都為SUCCESS的時(shí)候有返回
????????????String?prepay_id?=?payResult.get("prepay_id");

????????????Map<String, String>?prepayParams?=?new?HashMap<String, String>();
????????????prepayParams.put("return_code",?"SUCCESS");
????????????prepayParams.put("appId",?appid);
????????????prepayParams.put("mch_id",?mch_id);
????????????prepayParams.put("nonceStr",?System.currentTimeMillis()?+?"");
????????????prepayParams.put("prepay_id",?prepay_id);
????????????String?prepaySign?=?null;
????????????if?(sign.equals(packageSign))?{
????????????????prepayParams.put("result_code",?"SUCCESS");
????????????}else?{
????????????????prepayParams.put("result_code",?"FAIL");
????????????????prepayParams.put("err_code_des",?"訂單失效");???//result_code為FAIL時(shí)，添加該鍵值對，value值是微信告訴客戶的信息
????????????}
????????????prepaySign?=?PaymentKit.createSign(prepayParams,?paternerKey);
????????????prepayParams.put("sign",?prepaySign);
????????????String?xml?=?PaymentKit.toXml(prepayParams);
????????????log.error(xml);
????????????renderText(xml);
????????}
????}?catch?(UnsupportedEncodingException?e)?{
????????//?TODO?Auto-generated?catch?block
????????e.printStackTrace();
????}?catch?(IOException?e)?{
????????//?TODO?Auto-generated?catch?block
????????e.printStackTrace();
????}

}

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