小程序支付回调(完整版)

小程序支付回调

1.Controller层

2.WechatConfig 配置

需要注意的是，这里的回调地址如果你是本地测试，你只需要使用网络穿透工具就行，如果是线上服务，就需要https协议的，外网可访问地址。

3.XMLUtil工具类

/**
     * XML格式字符串转换为Map
     *
     * @param strXML XML字符串
     * @return XML数据转换后的Map
     * @throws Exception
     */
    public static Map<String, String> xmlToMap(String strXML) throws Exception {
          
   
        try {
          
   
            Map<String, String> data = new HashMap<String, String>();
            DocumentBuilder documentBuilder = WXPayXmlUtil.newDocumentBuilder();
            String info=strXML.trim();
            InputStream stream = new ByteArrayInputStream(info.getBytes("UTF-8"));
            org.w3c.dom.Document doc = documentBuilder.parse(stream);
            doc.getDocumentElement().normalize();
            NodeList nodeList = doc.getDocumentElement().getChildNodes();
            for (int idx = 0; idx < nodeList.getLength(); ++idx) {
          
   
                Node node = nodeList.item(idx);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
          
   
                    org.w3c.dom.Element element = (org.w3c.dom.Element) node;
                    data.put(element.getNodeName(), element.getTextContent());
                }
            }
            try {
          
   
                stream.close();
            } catch (Exception ex) {
          
   
                // do nothing
            }
            return data;
        } catch (Exception ex) {
          
   
            WXPayUtil.getLogger().warn("Invalid XML, can not convert to map. Error message: {}. XML content: {}", ex.getMessage(), strXML);
            throw ex;
        }

    }

WXPayUtil.getLogger()

/**
     * 日志
     * @return
     */
    public static Logger getLogger() {
          
   
        Logger logger = LoggerFactory.getLogger("wxpay java sdk");
        return logger;
    }

4.PayCommonUtil工具,用于校验签名参数

/**
     * 是否签名正确,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
     * @return boolean
     */
    public static boolean isTenpaySign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
          
   
        StringBuffer sb = new StringBuffer();
        Set es = packageParams.entrySet();
        Iterator it = es.iterator();
        while(it.hasNext()) {
          
   
            Map.Entry entry = (Map.Entry)it.next();
            String k = (String)entry.getKey();
            String v = (String)entry.getValue();
            if(!"sign".equals(k) && null != v && !"".equals(v)) {
          
   
                sb.append(k + "=" + v + "&");
            }
        }

        sb.append("key=" + API_KEY);

        //算出摘要
        String mysign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toLowerCase();
        String tenpaySign = ((String)packageParams.get("sign")).toLowerCase();

        return tenpaySign.equals(mysign);
    }

5.WXPayXmlUtil

public final class WXPayXmlUtil {
          
   
    public static DocumentBuilder newDocumentBuilder() throws ParserConfigurationException {
          
   
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        documentBuilderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
        documentBuilderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
        documentBuilderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
        documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        documentBuilderFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
        documentBuilderFactory.setXIncludeAware(false);
        documentBuilderFactory.setExpandEntityReferences(false);

        return documentBuilderFactory.newDocumentBuilder();
    }

    public static Document newDocument() throws ParserConfigurationException {
          
   
        return newDocumentBuilder().newDocument();
    }
}