app微信支付

来源：互联网发布：大数据架构编辑：程序博客网时间：2024/04/30 09:47

获取prepayId:

public Map<String, String> getAppPayInfo(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String callbackUrl) {    WxMpPrepayIdResult wxMpPrepayIdResult = getPrepayId(openId, outTradeNo, amt, body, tradeType, ip, callbackUrl);    String prepayId = wxMpPrepayIdResult.getPrepay_id();    if (prepayId == null || prepayId.equals("")) {        throw new RuntimeException("get prepayid error");    }    Map<String, String> payInfo = new HashMap<String, String>();    payInfo.put("appid", wxMpConfigStorage.getAppId());    payInfo.put("noncestr", wxMpPrepayIdResult.getNonce_str());    payInfo.put("package", "Sign=WXPay");    payInfo.put("partnerid", wxMpConfigStorage.getPartnerId());    payInfo.put("prepayid", prepayId);    payInfo.put("timestamp", String.valueOf(System.currentTimeMillis() / 1000));    String finalSign = WxCryptUtil.createSign(payInfo, wxMpConfigStorage.getPartnerKey());    payInfo.put("sign", finalSign);    return payInfo;}

签名:

    /**     * 微信公众号支付签名算法(详见:http://pay.weixin.qq.com/wiki/doc/api/index.php?chapter=4_3)     * @param packageParams 原始参数     * @param signKey 加密Key(即 商户Key)     * @param charset 编码     * @return 签名字符串     */    public static String createSign(Map<String, String> packageParams, String signKey) {        SortedMap<String, String> sortedMap = new TreeMap<String, String>();        sortedMap.putAll(packageParams);        List<String> keys = new ArrayList<String>(packageParams.keySet());        Collections.sort(keys);        StringBuffer toSign = new StringBuffer();        for (String key : keys) {            String value = packageParams.get(key);            if (null != value && !"".equals(value) && !"sign".equals(key)                    && !"key".equals(key)) {                toSign.append(key + "=" + value + "&");            }        }        toSign.append("key=" + signKey);        System.out.println(toSign.toString());        String sign = DigestUtils.md5Hex(toSign.toString())                .toUpperCase();        return sign;    }

getPrepayId<span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);">:</span>

  public WxMpPrepayIdResult getPrepayId(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String callbackUrl) {    String nonce_str = System.currentTimeMillis() + "";    SortedMap<String, String> packageParams = new TreeMap<String, String>();    packageParams.put("appid", wxMpConfigStorage.getAppId());    packageParams.put("mch_id", wxMpConfigStorage.getPartnerId());    packageParams.put("nonce_str", nonce_str);    packageParams.put("body", body);    packageParams.put("out_trade_no", outTradeNo);    packageParams.put("total_fee", (int)(amt*100) + "");    packageParams.put("spbill_create_ip", ip);    packageParams.put("notify_url", callbackUrl);    packageParams.put("trade_type", tradeType);    packageParams.put("openid", openId);    String sign = WxCryptUtil.createSign(packageParams, wxMpConfigStorage.getPartnerKey());    String xml = "<xml>" +            "<appid>" + wxMpConfigStorage.getAppId() + "</appid>" +            "<mch_id>" + wxMpConfigStorage.getPartnerId() + "</mch_id>" +            "<nonce_str>" + nonce_str + "</nonce_str>" +            "<sign>" + sign + "</sign>" +            "<body><![CDATA[" + body + "]]></body>" +            "<out_trade_no>" + outTradeNo + "</out_trade_no>" +            "<total_fee>" + packageParams.get("total_fee") + "</total_fee>" +            "<spbill_create_ip>" + ip + "</spbill_create_ip>" +            "<notify_url>" + callbackUrl + "</notify_url>" +            "<trade_type>" + tradeType + "</trade_type>" +            "<openid>" + openId + "</openid>" +            "</xml>";    HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/pay/unifiedorder");    if (httpProxy != null) {      RequestConfig config = RequestConfig.custom().setProxy(httpProxy).build();      httpPost.setConfig(config);    }    StringEntity entity = new StringEntity(xml, Consts.UTF_8);    httpPost.setEntity(entity);    try {      CloseableHttpResponse response = getHttpclient().execute(httpPost);      String responseContent = Utf8ResponseHandler.INSTANCE.handleResponse(response);      XStream xstream = XStreamInitializer.getInstance();      xstream.alias("xml", WxMpPrepayIdResult.class);      WxMpPrepayIdResult wxMpPrepayIdResult = (WxMpPrepayIdResult) xstream.fromXML(responseContent);      return wxMpPrepayIdResult;    } catch (IOException e) {      e.printStackTrace();    }    return new WxMpPrepayIdResult();  }

/** * 处理微信支付请求 *  * @param tradeNo * @param amt * @param request * @return */private Map<String, String> dealWxPay(String tradeNo, Double amt, HttpServletRequest request) {// 用户app ipString ip = PayUtil.getClientIp(request);logger.info("get payment user ip : {}", ip);// 通知地址String notifyUrl = PropertiesUtil.getString("notifyUrl");logger.info("get payment notifyUrl : {}", notifyUrl);Map<String, String> prepayIdResult = wxMpService.getAppPayInfo("", tradeNo, amt, "APP充值", "APP", ip,notifyUrl);logger.info("get weixin prepayId info : {}", prepayIdResult);return prepayIdResult;}

处理通知（这里要注意验证微信传来消息）：

/** * 微信支付返回消息验证 *  * @param request * @param response * @return */@RequestMapping("/wx/payNotify")@ResponseBodypublic void wxPayNotify(HttpServletRequest request, HttpServletResponse response) {Map<String, String> payInfo = null;try {String inputLine;StringBuffer notityXml = new StringBuffer("");BufferedReader reader = request.getReader();while ((inputLine = reader.readLine()) != null) {notityXml.append(inputLine);}payInfo = XMLUtil.doXMLParse(notityXml.toString());logger.info("解析微信支付结果:{}", payInfo);} catch (Exception e) {logger.error("解析微信支付通知有误:{}", e);return;}String returnCode = payInfo.get("return_code");if (returnCode.isEmpty()) {logger.warn("从微信获取支付结果错误:returnCode is empty.");return;}if (returnCode.equals("FAIL")) {logger.warn("微信支付失败");return;}logger.info("get payInfo:{}", payInfo);String finalSign = WxCryptUtil.createSign(payInfo, wxMpConfigStorage.getPartnerKey());logger.info("get sign:{},tenpaySign:{}", finalSign, payInfo.get("sign"));// 判断签名if (payInfo.get("sign").toUpperCase().equals(finalSign)) {String tradeNo = payInfo.get("out_trade_no");logger.info("tradeNo : " + tradeNo);Integer amt = Integer.parseInt(payInfo.get("total_fee"));boolean dealResult = dealPayResult(tradeNo, amt, payInfo);if (dealResult) {String wxResponse = TenpayUtil.setXML("SUCCESS", "OK");logger.info("weixin pay result : " + wxResponse);try {PrintWriter out = response.getWriter();out.write(wxResponse);out.flush();logger.info("微信充值成功:{}", payInfo.toString());return;} catch (IOException e) {logger.error("回复微信支付消息失败:{}", e);return;}} else {String wxResponse = TenpayUtil.setXML("FAIL", "");logger.info("weixin pay result : " + wxResponse);try {PrintWriter out = response.getWriter();out.write(wxResponse);out.flush();logger.warn("系统错误，充值失败");return;} catch (IOException e) {logger.error("回复微信支付消息失败:{}", e);return;}}} else {logger.warn("签名验证不通过");}}

解析微信XML通知方法:

/** * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。 * @param strxml * @return * @throws JDOMException * @throws IOException */public static Map doXMLParse(String strxml) throws JDOMException, IOException {strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");if(null == strxml || "".equals(strxml)) {return null;}Map m = new HashMap();InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));SAXBuilder builder = new SAXBuilder();Document doc = builder.build(in);Element root = doc.getRootElement();List list = root.getChildren();Iterator it = list.iterator();while(it.hasNext()) {Element e = (Element) it.next();String k = e.getName();String v = "";List children = e.getChildren();if(children.isEmpty()) {v = e.getTextNormalize();} else {v = XMLUtil.getChildrenText(children);}m.put(k, v);}//关闭流in.close();return m;}

给微信返回处理结果。

/** * @author cxy * @Description：返回给微信的参数 * @param return_code 返回编码 * @param return_msg  返回信息 * @return */public static String setXML(String return_code, String return_msg) {return "<xml><return_code><![CDATA[" + return_code+ "]]></return_code><return_msg><![CDATA[" + return_msg+ "]]></return_msg></xml>";}

推荐一个微信开发的现成代码：

weixin-java-tools

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