在我们对接微信支付的时候可能会出现用户支付了，但我们系统业务支付状态并没有改变的情况，这是因为微信推送支付数据流的时候是后台通知交互时，

如果微信收到商户的应答不符合规范或超时，微信会判定本次通知失败，重新发送通知，直到成功为止（在通知一直不成功的情况下，微信总共会发起10次通知，

通知频率为15s/15s/30s/3m/10m/20m/30m/30m/30m/60m/3h/3h/3h/6h/6h - 总计 24h4m），但微信不保证通知最终一定能成功。

所以这里就需要我们自己主动去查询：接口详细说明地址（http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_2）

1   //创建一个定时器主动查询订单支付状态 2         Timer timer = new Timer(); 3         timer.schedule(new TimerTask() { 4  5             //最大重试次数 6             int MAX_RETRY = 5; 7  8             @Override 9             public void run() {10 11                 MAX_RETRY--;12 13                 //检查订单系统14                 WxpOrderDTO wxpOrderDTO = 15                              wxpOrderMapper.selectWxpOrder(orderNo);16 17                 if (wxpOrderDTO.getStatus().equals("1")) {18 19                     //取消定时器(订单支付成功)20                     timer.cancel();21 22                 } else {23 24                     //查询订单状态25                     WxMpPayResult payResult = wxMpService.getJSSDKPayResult(null, orderNo);26                     if (payResult.getReturn_code().equals("SUCCESS")) {27 28                         //已经支付，更新订单状态29                         if (payResult.getResult_code().equals("SUCCESS")) {30                             wxpOrderMapper.updateOrderStatus(orderNo);31                         }32 33                     }34 35                 }36 37                 if (MAX_RETRY == 0) {38 39                     //取消定时器(用户取消支付)40                     timer.cancel();41 42                 }43 44 45             }46 47         }, 2000, 5000);

 

/**     * 该接口提供所有微信支付订单的查询,当支付通知处理异常戒丢失的情冴,商户可以通过该接口查询订单支付状态。     * 详见http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_2     * @param transactionId     * @param outTradeNo     */    WxMpPayResult getJSSDKPayResult(String transactionId, String outTradeNo);

 

1  @Override 2   public WxMpPayResult getJSSDKPayResult(String transactionId, String outTradeNo) { 3     String nonce_str = System.currentTimeMillis() + ""; 4  5     SortedMap
     
       packageParams = new TreeMap
      
       (); 6     packageParams.put("appid", wxMpConfigStorage.getAppId()); 7     packageParams.put("mch_id", wxMpConfigStorage.getPartnerId()); 8     if (transactionId != null && !"".equals(transactionId.trim())) 9       packageParams.put("transaction_id", transactionId);10     else if (outTradeNo != null && !"".equals(outTradeNo.trim()))11       packageParams.put("out_trade_no", outTradeNo);12     else13       throw new IllegalArgumentException("Either 'transactionId' or 'outTradeNo' must be given.");14     packageParams.put("nonce_str", nonce_str);15     packageParams.put("sign", WxCryptUtil.createSign(packageParams, wxMpConfigStorage.getPartnerKey()));16 17     StringBuilder request = new StringBuilder("
       
        ");18     for (Entry
        
          para : packageParams.entrySet()) {19       request.append(String.format("<%s>%s
         ", para.getKey(), para.getValue(), para.getKey()));20     }21     request.append("
        
       ");22 23     HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/pay/orderquery");24     if (httpProxy != null) {25       RequestConfig config = RequestConfig.custom().setProxy(httpProxy).build();26       httpPost.setConfig(config);27     }28 29     StringEntity entity = new StringEntity(request.toString(), Consts.UTF_8);30     httpPost.setEntity(entity);31     try {32       CloseableHttpResponse response = httpClient.execute(httpPost);33       String responseContent = Utf8ResponseHandler.INSTANCE.handleResponse(response);34       XStream xstream = XStreamInitializer.getInstance();35       xstream.alias("xml", WxMpPayResult.class);36       WxMpPayResult wxMpPayResult = (WxMpPayResult) xstream.fromXML(responseContent);37       return wxMpPayResult;38     } catch (IOException e) {39       throw new RuntimeException("Failed to query order due to IO exception.", e);40     }41   }
      
     

哈哈，具体要根据自己的业务来做啊，这里提供一个思路，O(∩_∩)O哈哈~