Java微信小程序的支付对接demo

一、开发前必须有如下东西：

appId(小程序分配)
小程序**(小程序配置界面获取)
商户号
api**(商家后台自己设置)

二、这是微信小程序支付的流程图三、Controller层，

    /**
     * 微信支付
     */
    @RequestMapping(value = "wxOrderId", method = RequestMethod.POST)
    public ResponseVos doUnifiedOrder() throws Exception {
        //支付金额，需要转成字符串类型，否则后面的签名会失败
        double total_fee = 1;
        MyConfig config = null;
        WXPay wxpay = null;
        try {
            config = new MyConfig();
            wxpay = new WXPay(config);
        } catch (Exception e) {
            e.printStackTrace();
        }
        //生成的随机字符串
        String nonce_str = WXPayUtil.generateNonceStr();
        
        //获取本机的ip地址
        InetAddress addr = null;
        try {
            addr = InetAddress.getLocalHost();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        String spbill_create_ip = addr.getHostAddress();

        //商品描述
        String body = "产品支付";
        //商户订单号
        String out_trade_no = WXPayUtil.generateNonceStr();
        //统一下单接口参数
        HashMap<String, String> data = new HashMap<String, String>();

        //1.参数封装
        //公众账号ID
        data.put("appid", ConstantUtil.appId);
        //商户号
        data.put("mch_id", ConstantUtil.mchId);
        //随机字符串
        data.put("nonce_str", WXPayUtil.generateNonceStr());
        data.put("body", body);
        //交易订单号
        data.put("out_trade_no", out_trade_no);
        //金额（分）
        data.put("total_fee", String.valueOf(total_fee);
        data.put("spbill_create_ip", spbill_create_ip);
        data.put("notify_url", ConstantUtil.notifyUrl);
        //交易类型
        data.put("trade_type", "JSAPI");
        //用户标示
        //openid是你微信授权过返回的用户的唯一的标识，这个你可以传参进来，前期为了测试支付是否能调起来先写死
        data.put("openid", openid);
        String xmlParam = WXPayUtil.generateSignedXml(data, ConstantUtil.partnerKey);
        //2.发送请求
        String xmlResult = HttpUtil.doPost("https://api.mch.weixin.qq.com/pay/unifiedorder", xmlParam);
        //3.获取结果
        Map<String, String> mapResult = WXPayUtil.xmlToMap(xmlResult);
        System.out.println("微信返回结果" + mapResult);
        try {
            if (mapResult.get("return_code").equals("SUCCESS")) {
                //返回给APP端的参数，APP端再调起支付接口
                Map<String, String> repData = new HashMap<>();
                repData.put("appId", ConstantUtil.appId);
                String packag = "prepay_id=" + mapResult.get("prepay_id");
                String str = WXPayUtil.generateNonceStr();
                repData.put("package", packag);
                repData.put("signType", "MD5");
                repData.put("nonceStr", str);
                repData.put("timeStamp", String.valueOf(System.currentTimeMillis() / 1000));

                //签名
                //商户号对应的** ConstantUtil.partnerKey
                String sign = WXPayUtil.generateSignature(repData, ConstantUtil.partnerKey);
                Map<String, String> map = new HashMap<>();
                map.put("prepayid", mapResult.get("prepay_id"));
                map.put("mch_id", ConstantUtil.mchId);
                map.put("paySign", sign);
                map.put("timeStamp", repData.get("timeStamp"));
                map.put("nonceStr", str);
                map.put("package", packag);
                map.put("signType", "MD5");
                return ResponseVos.success(map);
            } else {
                return ResponseVos.serviceFail("失败");
            }
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseVos.serviceFail("失败");
        }
    }

四、用到的工具类

package cn.stylefeng.guns.core.util.sdk;

import cn.stylefeng.guns.core.util.sdk.WXPayConstants.SignType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.security.MessageDigest;
import java.security.SecureRandom;
import java.util.*;


public class WXPayUtil {

    private static final String SYMBOLS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    private static final Random RANDOM = new SecureRandom();

    /**
     * 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();
            InputStream stream = new ByteArrayInputStream(strXML.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;
        }

    }

    /**
     * 将Map转换为XML格式的字符串
     *
     * @param data Map类型数据
     * @return XML格式的字符串
     * @throws Exception
     */
    public static String mapToXml(Map<String, String> data) throws Exception {
        org.w3c.dom.Document document = WXPayXmlUtil.newDocument();
        org.w3c.dom.Element root = document.createElement("xml");
        document.appendChild(root);
        for (String key: data.keySet()) {
            String value = data.get(key);
            if (value == null) {
                value = "";
            }
            value = value.trim();
            org.w3c.dom.Element filed = document.createElement(key);
            filed.appendChild(document.createTextNode(value));
            root.appendChild(filed);
        }
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();
        DOMSource source = new DOMSource(document);
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        StringWriter writer = new StringWriter();
        StreamResult result = new StreamResult(writer);
        transformer.transform(source, result);
        String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");
        try {
            writer.close();
        }
        catch (Exception ex) {
        }
        return output;
    }


    /**
     * 生成带有 sign 的 XML 格式字符串
     *
     * @param data Map类型数据
     * @param key API**
     * @return 含有sign字段的XML
     */
    public static String generateSignedXml(final Map<String, String> data, String key) throws Exception {
        return generateSignedXml(data, key, SignType.MD5);
    }

    /**
     * 生成带有 sign 的 XML 格式字符串
     *
     * @param data Map类型数据
     * @param key API**
     * @param signType 签名类型
     * @return 含有sign字段的XML
     */
    public static String generateSignedXml(final Map<String, String> data, String key, SignType signType) throws Exception {
        String sign = generateSignature(data, key, signType);
        data.put(WXPayConstants.FIELD_SIGN, sign);
        return mapToXml(data);
    }


    /**
     * 判断签名是否正确
     *
     * @param xmlStr XML格式数据
     * @param key API**
     * @return 签名是否正确
     * @throws Exception
     */
    public static boolean isSignatureValid(String xmlStr, String key) throws Exception {
        Map<String, String> data = xmlToMap(xmlStr);
        if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
            return false;
        }
        String sign = data.get(WXPayConstants.FIELD_SIGN);
        return generateSignature(data, key).equals(sign);
    }

    /**
     * 判断签名是否正确，必须包含sign字段，否则返回false。使用MD5签名。
     *
     * @param data Map类型数据
     * @param key API**
     * @return 签名是否正确
     * @throws Exception
     */
    public static boolean isSignatureValid(Map<String, String> data, String key) throws Exception {
        return isSignatureValid(data, key, SignType.MD5);
    }

    /**
     * 判断签名是否正确，必须包含sign字段，否则返回false。
     *
     * @param data Map类型数据
     * @param key API**
     * @param signType 签名方式
     * @return 签名是否正确
     * @throws Exception
     */
    public static boolean isSignatureValid(Map<String, String> data, String key, SignType signType) throws Exception {
        if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
            return false;
        }
        String sign = data.get(WXPayConstants.FIELD_SIGN);
        return generateSignature(data, key, signType).equals(sign);
    }

    /**
     * 生成签名
     *
     * @param data 待签名数据
     * @param key API**
     * @return 签名
     */
    public static String generateSignature(final Map<String, String> data, String key) throws Exception {
        return generateSignature(data, key, SignType.MD5);
    }

    /**
     * 生成签名. 注意，若含有sign_type字段，必须和signType参数保持一致。
     *
     * @param data 待签名数据
     * @param key API**
     * @param signType 签名方式
     * @return 签名
     */
    public static String generateSignature(final Map<String, String> data, String key, SignType signType) throws Exception {
        Set<String> keySet = data.keySet();
        String[] keyArray = keySet.toArray(new String[keySet.size()]);
        Arrays.sort(keyArray);
        StringBuilder sb = new StringBuilder();
        for (String k : keyArray) {
            if (k.equals(WXPayConstants.FIELD_SIGN)) {
                continue;
            }
            if (data.get(k).trim().length() > 0) // 参数值为空，则不参与签名
                sb.append(k).append("=").append(data.get(k).trim()).append("&");
        }
        sb.append("key=").append(key);
        if (SignType.MD5.equals(signType)) {
            return MD5(sb.toString()).toUpperCase();
        }
        else if (SignType.HMACSHA256.equals(signType)) {
            return  MD5(sb.toString()).toUpperCase();
        }
        else {
            throw new Exception(String.format("Invalid sign_type: %s", signType));
        }
    }


    /**
     * 获取随机字符串 Nonce Str
     *
     * @return String 随机字符串
     */
    public static String generateNonceStr() {
        char[] nonceChars = new char[32];
        for (int index = 0; index < nonceChars.length; ++index) {
            nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));
        }
        return new String(nonceChars);
    }


    /**
     * 生成 MD5
     *
     * @param data 待处理数据
     * @return MD5结果
     */
    public static String MD5(String data) throws Exception {
        java.security.MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] array = md.digest(data.getBytes("UTF-8"));
        StringBuilder sb = new StringBuilder();
        for (byte item : array) {
            sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
        }
        return sb.toString().toUpperCase();
    }

    /**
     * 生成 HMACSHA256
     * @param data 待处理数据
     * @param key **
     * @return 加密结果
     * @throws Exception
     */
    public static String HMACSHA256(String data, String key) throws Exception {
        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
        SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
        sha256_HMAC.init(secret_key);
        byte[] array = sha256_HMAC.doFinal(data.getBytes("UTF-8"));
        StringBuilder sb = new StringBuilder();
        for (byte item : array) {
            sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
        }
        return sb.toString().toUpperCase();
    }

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

    /**
     * 获取当前时间戳，单位秒
     * @return
     */
    public static long getCurrentTimestamp() {
        return System.currentTimeMillis()/1000;
    }

    /**
     * 获取当前时间戳，单位毫秒
     * @return
     */
    public static long getCurrentTimestampMs() {
        return System.currentTimeMillis();
    }

}

package cn.stylefeng.guns.core.util.sdk;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.*;

/**
 * HttpClient4.3工具类
 */
@Slf4j
public class HttpClientUtils {

    private static RequestConfig requestConfig = null;
    private static String charset = "utf-8";

    public static void main(String[] args) {
        JSONObject tt = new JSONObject();
        tt.put("aaa", "4444");

        Map mm = new HashMap();
        mm.put("aaa", "555");

        System.out.println("result:" + httpPostForm("http://127.0.0.1:8761/hi2", mm));
    }


    static {
        // 设置请求和传输超时时间
        requestConfig = RequestConfig.custom().setSocketTimeout(5000).setConnectTimeout(5000).build();
    }


    /**
     * @param url
     * @param obj 1. json字符串   2. map  3.JSONObject
     * @return JSONObject
     */
    public static JSONObject httpPost(String url, Object obj) {
        // post请求返回结果
        CloseableHttpClient httpClient = HttpClients.createDefault();
        JSONObject jsonResult = null;
        HttpPost httpPost = new HttpPost(url);
        // 设置请求和传输超时时间
        httpPost.setConfig(requestConfig);
        try {
            if (null != obj) {
                StringEntity entity = null;
                if (obj instanceof String) {
                    entity = new StringEntity(obj.toString(), charset);
                } else {
                    entity = new StringEntity(JSON.toJSONString(obj), charset);
                }
                entity.setContentEncoding(charset);
                entity.setContentType("application/json");
                httpPost.setEntity(entity);
            }
            log.debug(" {} - {} ", url, obj);
            CloseableHttpResponse response = httpClient.execute(httpPost);

            return convertResponse(response);
        } catch (Exception e) {
            log.error("error HttpClientUtils {} - {} - {}" + url, obj, e);
        } finally {
            httpPost.releaseConnection();
        }
        return jsonResult;
    }


    /**
     * post请求传输String参数 例如：name=Jack&sex=1&type=2
     * Content-type:application/x-www-form-urlencoded
     *
     * @param url url地址
     * @param
     * @return
     */
    public static JSONObject httpPostForm(String url, Map<String, String> params) {
        // post请求返回结果
        CloseableHttpClient httpClient = HttpClients.createDefault();
        JSONObject jsonResult = null;
        HttpPost httpPost = new HttpPost(url);
        httpPost.setConfig(requestConfig);
        try {
            if (null != params) {
                //组织请求参数
                List<NameValuePair> paramList = new ArrayList<NameValuePair>();
                if (params != null && params.size() > 0) {
                    Set<String> keySet = params.keySet();
                    for (String key : keySet) {
                        paramList.add(new BasicNameValuePair(key, params.get(key)));
                    }
                }

                httpPost.setEntity(new UrlEncodedFormEntity(paramList, charset));
            }
            CloseableHttpResponse response = httpClient.execute(httpPost);
            return convertResponse(response);
        } catch (IOException e) {
            log.error("post请求提交失败:" + url, e);
        } finally {
            httpPost.releaseConnection();
        }
        return jsonResult;
    }

    /**
     * 发送get请求
     *
     * @param url 路径
     * @return
     */
    public static JSONObject httpGet(String url) {
        // get请求返回结果
        JSONObject jsonResult = null;
        CloseableHttpClient client = HttpClients.createDefault();
        // 发送get请求
        HttpGet request = new HttpGet(url);
        request.setConfig(requestConfig);
        try {
            CloseableHttpResponse response = client.execute(request);

            convertResponse(response);
        } catch (Exception e) {
            log.error("get请求提交失败:" + url, e);
        } finally {
            request.releaseConnection();
        }
        return jsonResult;
    }

    private static JSONObject convertResponse(CloseableHttpResponse response) throws IOException, ParseException {
        // 请求发送成功，并得到响应
        if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
            // 读取服务器返回过来的json字符串数据
            HttpEntity entity = response.getEntity();
            String strResult = EntityUtils.toString(entity, "utf-8");
            // 把json字符串转换成json对象
            return JSONObject.parseObject(strResult);
        } else {
            log.error(" {} ", response);
        }

        return null;
    }


}

package cn.stylefeng.guns.core.util.sdk;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * 作者: yushuangyu
 * 时间: 2020年06月14日 18:22
 * 描述:
 */
public class WeiXinPayUtil {

    /**
     * 微信回调参数解析
     *
     * @param request
     * @return
     */
    public static String getPostStr(HttpServletRequest request) {
        StringBuffer sb = new StringBuffer();
        try {
            InputStream is = request.getInputStream();
            InputStreamReader isr = new InputStreamReader(is, "UTF-8");
            BufferedReader br = new BufferedReader(isr);
            String s = "";

            while ((s = br.readLine()) != null) {
                sb.append(s);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        String xml = sb.toString(); //次即为接收到微信端发送过来的xml数据
        return xml;


    }
}

package cn.stylefeng.guns.core.util.sdk;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;


public class HttpUtil {

    //private static Logger logger = Logger.getLogger(HttpUtil.class);

    /**
     * get请求
     * @return
     */
    public static String doGet(String url) {
        try {
            HttpClient client = new DefaultHttpClient();
            //发送get请求
            HttpGet request = new HttpGet(url);
            HttpResponse response = client.execute(request);

            /**请求发送成功，并得到响应**/
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                /**读取服务器返回过来的json字符串数据**/
                String strResult = EntityUtils.toString(response.getEntity());

                return strResult;
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * post请求(用于key-value格式的参数)
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, Map params){

        BufferedReader in = null;
        try {
            // 定义HttpClient
            HttpClient client = new DefaultHttpClient();
            // 实例化HTTP方法
            HttpPost request = new HttpPost();
            request.setURI(new URI(url));

            //设置参数
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            for (Iterator iter = params.keySet().iterator(); iter.hasNext();) {
                String name = (String) iter.next();
                String value = String.valueOf(params.get(name));
                nvps.add(new BasicNameValuePair(name, value));

                //System.out.println(name +"-"+value);
            }
            request.setEntity(new UrlEncodedFormEntity(nvps,HTTP.UTF_8));

            HttpResponse response = client.execute(request);
            int code = response.getStatusLine().getStatusCode();
            if(code == 200){    //请求成功
                in = new BufferedReader(new InputStreamReader(response.getEntity()
                        .getContent(),"utf-8"));
                StringBuffer sb = new StringBuffer("");
                String line = "";
                String NL = System.getProperty("line.separator");
                while ((line = in.readLine()) != null) {
                    sb.append(line + NL);
                }

                in.close();

                return sb.toString();
            }
            else{    //
                System.out.println("状态码：" + code);
                return null;
            }
        }
        catch(Exception e){
            e.printStackTrace();

            return null;
        }
    }

    /**
     * post请求（用于请求json格式的参数）
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, String params) throws Exception {

        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);// 创建httpPost
        httpPost.setHeader("Accept", "application/json");
        httpPost.setHeader("Content-Type", "application/json");
        String charSet = "UTF-8";
        StringEntity entity = new StringEntity(params, charSet);
        httpPost.setEntity(entity);
        CloseableHttpResponse response = null;

        try {

            response = httpclient.execute(httpPost);
            StatusLine status = response.getStatusLine();
            int state = status.getStatusCode();
            if (state == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                String jsonString = EntityUtils.toString(responseEntity);
                return jsonString;
            }
            else{
                //logger.error("请求返回:"+state+"("+url+")");
            }
        }
        finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

}

package cn.stylefeng.guns.core.util.sdk;

/**
 * 域名管理，实现主备域名自动切换
 */
public abstract interface IWXPayDomain {
    /**
     * 上报域名网络状况
     * @param domain 域名。 比如：api.mch.weixin.qq.com
     * @param elapsedTimeMillis 耗时
     * @param ex 网络请求中出现的异常。
     *           null表示没有异常
     *           ConnectTimeoutException，表示建立网络连接异常
     *           UnknownHostException， 表示dns解析异常
     */
    abstract void report(final String domain, long elapsedTimeMillis, final Exception ex);

    /**
     * 获取域名
     * @param config 配置
     * @return 域名
     */
    abstract DomainInfo getDomain(final WXPayConfig config);

    static class DomainInfo{
        public String domain;       //域名
        public boolean primaryDomain;     //该域名是否为主域名。例如:api.mch.weixin.qq.com为主域名
        public DomainInfo(String domain, boolean primaryDomain) {
            this.domain = domain;
            this.primaryDomain = primaryDomain;
        }

        @Override
        public String toString() {
            return "DomainInfo{" +
                    "domain='" + domain + '\'' +
                    ", primaryDomain=" + primaryDomain +
                    '}';
        }
    }

}

package cn.stylefeng.guns.core.util.sdk;

import com.jfinal.kit.PathKit;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

/**
 * 作者: yushuangyu
 * 时间: 2020年05月30日 8:47
 * 描述:
 */
public class MyConfig extends WXPayConfig {

    private byte[] certData;

    public MyConfig() throws Exception {
    }


    public String getAppID() {
        return ""; //你的appid
    }

    public String getMchID() {
        return ""; //你的商户号mch_id
    }

    public String getKey() {
        return ""; //你的商户号秘钥 key
    }

    public InputStream getCertStream() {
        ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
        return certBis;
    }

    public int getHttpConnectTimeoutMs() {
        return 8000;
    }

    public int getHttpReadTimeoutMs() {
        return 10000;
    }

    public void initCert() throws Exception {
        String certPath = PathKit.getRootClassPath() + "\\cert\\apiclient_cert.p12";//从微信商户平台下载的安全证书存放的目录
        System.out.println(certPath);
        File file = new File(certPath);
        InputStream certStream = new FileInputStream(file);
        this.certData = new byte[(int) file.length()];
        certStream.read(this.certData);
        certStream.close();
    }


    public IWXPayDomain getWXPayDomain() {
        // 这个方法需要这样实现, 否则无法正常初始化WXPay
        IWXPayDomain iwxPayDomain = new IWXPayDomain() {
            public void report(String domain, long elapsedTimeMillis, Exception ex) {
            }
            public DomainInfo getDomain(WXPayConfig config) {
                return new IWXPayDomain.DomainInfo(WXPayConstants.DOMAIN_API, true);//微信工具常量类有 "api.mch.weixin.qq.com";   wxpay.unifiedorder()  /pay/unifiedorder
            }
        };
        return iwxPayDomain;

    }
}

package cn.stylefeng.guns.core.util.sdk;


import cn.stylefeng.guns.core.util.sdk.WXPayConstants.SignType;
import java.util.HashMap;
import java.util.Map;

public class WXPay {

    private WXPayConfig config;
    private SignType signType;
    private boolean autoReport;
    private boolean useSandbox;
    private String notifyUrl;
    private WXPayRequest wxPayRequest;

    public WXPay(final WXPayConfig config) throws Exception {
        this(config, null, true, false);
    }

    public WXPay(final WXPayConfig config, final boolean autoReport) throws Exception {
        this(config, null, autoReport, false);
    }


    public WXPay(final WXPayConfig config, final boolean autoReport, final boolean useSandbox) throws Exception {
        this(config, null, autoReport, useSandbox);
    }

    public WXPay(final WXPayConfig config, final String notifyUrl) throws Exception {
        this(config, notifyUrl, true, false);
    }

    public WXPay(final WXPayConfig config, final String notifyUrl, final boolean autoReport) throws Exception {
        this(config, notifyUrl, autoReport, false);
    }

    public WXPay(final WXPayConfig config, final String notifyUrl, final boolean autoReport, final boolean useSandbox) throws Exception {
        this.config = config;
        this.notifyUrl = notifyUrl;
        this.autoReport = autoReport;
        this.useSandbox = useSandbox;
        if (useSandbox) {
            this.signType = SignType.MD5; // 沙箱环境
        }
        else {
//            this.signType = SignType.HMACSHA256;
            this.signType = SignType.MD5;
        }
        this.wxPayRequest = new WXPayRequest(config);
    }

    private void checkWXPayConfig() throws Exception {
        if (this.config == null) {
            throw new Exception("config is null");
        }
        if (this.config.getAppID() == null || this.config.getAppID().trim().length() == 0) {
            throw new Exception("appid in config is empty");
        }
        if (this.config.getMchID() == null || this.config.getMchID().trim().length() == 0) {
            throw new Exception("appid in config is empty");
        }
        if (this.config.getCertStream() == null) {
            throw new Exception("cert stream in config is empty");
        }
        if (this.config.getWXPayDomain() == null){
            throw new Exception("config.getWXPayDomain() is null");
        }

        if (this.config.getHttpConnectTimeoutMs() < 10) {
            throw new Exception("http connect timeout is too small");
        }
        if (this.config.getHttpReadTimeoutMs() < 10) {
            throw new Exception("http read timeout is too small");
        }

    }

    /**
     * 向 Map 中添加 appid、mch_id、nonce_str、sign_type、sign <br>
     * 该函数适用于商户适用于统一下单等接口，不适用于红包、代金券接口
     *
     * @param reqData
     * @return
     * @throws Exception
     */
    public Map<String, String> fillRequestData(Map<String, String> reqData) throws Exception {
        reqData.put("appid", config.getAppID());
        reqData.put("mch_id", config.getMchID());
        reqData.put("nonce_str", WXPayUtil.generateNonceStr());
        if (SignType.MD5.equals(this.signType)) {
            reqData.put("sign_type", WXPayConstants.MD5);
        }
        else if (SignType.HMACSHA256.equals(this.signType)) {
            reqData.put("sign_type", WXPayConstants.HMACSHA256);
        }
        reqData.put("sign", WXPayUtil.generateSignature(reqData, config.getKey(), this.signType));
        return reqData;
    }

    /**
     * 判断xml数据的sign是否有效，必须包含sign字段，否则返回false。
     *
     * @param reqData 向wxpay post的请求数据
     * @return 签名是否有效
     * @throws Exception
     */
    public boolean isResponseSignatureValid(Map<String, String> reqData) throws Exception {
        // 返回数据的签名方式和请求中给定的签名方式是一致的
        return WXPayUtil.isSignatureValid(reqData, this.config.getKey(), this.signType);
    }

    /**
     * 判断支付结果通知中的sign是否有效
     *
     * @param reqData 向wxpay post的请求数据
     * @return 签名是否有效
     * @throws Exception
     */
    public boolean isPayResultNotifySignatureValid(Map<String, String> reqData) throws Exception {
        String signTypeInData = reqData.get(WXPayConstants.FIELD_SIGN_TYPE);
        SignType signType;
        if (signTypeInData == null) {
            signType = SignType.MD5;
        }
        else {
            signTypeInData = signTypeInData.trim();
            if (signTypeInData.length() == 0) {
                signType = SignType.MD5;
            }
            else if (WXPayConstants.MD5.equals(signTypeInData)) {
                signType = SignType.MD5;
            }
            else if (WXPayConstants.HMACSHA256.equals(signTypeInData)) {
                signType = SignType.HMACSHA256;
            }
            else {
                throw new Exception(String.format("Unsupported sign_type: %s", signTypeInData));
            }
        }
        return WXPayUtil.isSignatureValid(reqData, this.config.getKey(), signType);
    }


    /**
     * 不需要证书的请求
     * @param urlSuffix String
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 超时时间，单位是毫秒
     * @param readTimeoutMs 超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public String requestWithoutCert(String urlSuffix, Map<String, String> reqData,
                                     int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String msgUUID = reqData.get("nonce_str");
        String reqBody = WXPayUtil.mapToXml(reqData);

        String resp = this.wxPayRequest.requestWithoutCert(urlSuffix, msgUUID, reqBody, connectTimeoutMs, readTimeoutMs, autoReport);
        return resp;
    }


    /**
     * 需要证书的请求
     * @param urlSuffix String
     * @param reqData 向wxpay post的请求数据  Map
     * @param connectTimeoutMs 超时时间，单位是毫秒
     * @param readTimeoutMs 超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public String requestWithCert(String urlSuffix, Map<String, String> reqData,
                                  int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String msgUUID= reqData.get("nonce_str");
        String reqBody = WXPayUtil.mapToXml(reqData);

        String resp = this.wxPayRequest.requestWithCert(urlSuffix, msgUUID, reqBody, connectTimeoutMs, readTimeoutMs, this.autoReport);
        return resp;
    }

    /**
     * 处理 HTTPS API返回数据，转换成Map对象。return_code为SUCCESS时，验证签名。
     * @param xmlStr API返回的XML格式数据
     * @return Map类型数据
     * @throws Exception
     */
    public Map<String, String> processResponseXml(String xmlStr) throws Exception {
        String RETURN_CODE = "return_code";
        String return_code;
        Map<String, String> respData = WXPayUtil.xmlToMap(xmlStr);
        if (respData.containsKey(RETURN_CODE)) {
            return_code = respData.get(RETURN_CODE);
        }
        else {
            throw new Exception(String.format("No `return_code` in XML: %s", xmlStr));
        }

        if (return_code.equals(WXPayConstants.FAIL)) {
            return respData;
        }
        else if (return_code.equals(WXPayConstants.SUCCESS)) {
           if (this.isResponseSignatureValid(respData)) {
               return respData;
           }
           else {
               throw new Exception(String.format("Invalid sign value in XML: %s", xmlStr));
           }
        }
        else {
            throw new Exception(String.format("return_code value %s is invalid in XML: %s", return_code, xmlStr));
        }
    }

    /**
     * 作用：提交刷卡支付<br>
     * 场景：刷卡支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> microPay(Map<String, String> reqData) throws Exception {
        return this.microPay(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：提交刷卡支付<br>
     * 场景：刷卡支付
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> microPay(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_MICROPAY_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.MICROPAY_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }

    /**
     * 提交刷卡支付，针对软POS，尽可能做成功
     * 内置重试机制，最多60s
     * @param reqData
     * @return
     * @throws Exception
     */
    public Map<String, String> microPayWithPos(Map<String, String> reqData) throws Exception {
        return this.microPayWithPos(reqData, this.config.getHttpConnectTimeoutMs());
    }

    /**
     * 提交刷卡支付，针对软POS，尽可能做成功
     * 内置重试机制，最多60s
     * @param reqData
     * @param connectTimeoutMs
     * @return
     * @throws Exception
     */
    public Map<String, String> microPayWithPos(Map<String, String> reqData, int connectTimeoutMs) throws Exception {
        int remainingTimeMs = 60*1000;
        long startTimestampMs = 0;
        Map<String, String> lastResult = null;
        Exception lastException = null;

        while (true) {
            startTimestampMs = WXPayUtil.getCurrentTimestampMs();
            int readTimeoutMs = remainingTimeMs - connectTimeoutMs;
            if (readTimeoutMs > 1000) {
                try {
                    lastResult = this.microPay(reqData, connectTimeoutMs, readTimeoutMs);
                    String returnCode = lastResult.get("return_code");
                    if (returnCode.equals("SUCCESS")) {
                        String resultCode = lastResult.get("result_code");
                        String errCode = lastResult.get("err_code");
                        if (resultCode.equals("SUCCESS")) {
                            break;
                        }
                        else {
                            // 看错误码，若支付结果未知，则重试提交刷卡支付
                            if (errCode.equals("SYSTEMERROR") || errCode.equals("BANKERROR") || errCode.equals("USERPAYING")) {
                                remainingTimeMs = remainingTimeMs - (int)(WXPayUtil.getCurrentTimestampMs() - startTimestampMs);
                                if (remainingTimeMs <= 100) {
                                    break;
                                }
                                else {
                                    WXPayUtil.getLogger().info("microPayWithPos: try micropay again");
                                    if (remainingTimeMs > 5*1000) {
                                        Thread.sleep(5*1000);
                                    }
                                    else {
                                        Thread.sleep(1*1000);
                                    }
                                    continue;
                                }
                            }
                            else {
                                break;
                            }
                        }
                    }
                    else {
                        break;
                    }
                }
                catch (Exception ex) {
                    lastResult = null;
                    lastException = ex;
                }
            }
            else {
                break;
            }
        }

        if (lastResult == null) {
            throw lastException;
        }
        else {
            return lastResult;
        }
    }



    /**
     * 作用：统一下单<br>
     * 场景：公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> unifiedOrder(Map<String, String> reqData) throws Exception {
        return this.unifiedOrder(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：统一下单<br>
     * 场景：公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> unifiedOrder(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_UNIFIEDORDER_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.UNIFIEDORDER_URL_SUFFIX;
        }
        if(this.notifyUrl != null) {
            reqData.put("notify_url", this.notifyUrl);
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：查询订单<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> orderQuery(Map<String, String> reqData) throws Exception {
        return this.orderQuery(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：查询订单<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据 int
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> orderQuery(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_ORDERQUERY_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.ORDERQUERY_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：撤销订单<br>
     * 场景：刷卡支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> reverse(Map<String, String> reqData) throws Exception {
        return this.reverse(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：撤销订单<br>
     * 场景：刷卡支付<br>
     * 其他：需要证书
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> reverse(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_REVERSE_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.REVERSE_URL_SUFFIX;
        }
        String respXml = this.requestWithCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：关闭订单<br>
     * 场景：公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> closeOrder(Map<String, String> reqData) throws Exception {
        return this.closeOrder(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：关闭订单<br>
     * 场景：公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> closeOrder(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_CLOSEORDER_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.CLOSEORDER_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：申请退款<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> refund(Map<String, String> reqData) throws Exception {
        return this.refund(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：申请退款<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付<br>
     * 其他：需要证书
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> refund(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_REFUND_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.REFUND_URL_SUFFIX;
        }
        String respXml = this.requestWithCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：退款查询<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> refundQuery(Map<String, String> reqData) throws Exception {
        return this.refundQuery(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：退款查询<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> refundQuery(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_REFUNDQUERY_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.REFUNDQUERY_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：对账单下载（成功时返回对账单数据，失败时返回XML格式数据）<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> downloadBill(Map<String, String> reqData) throws Exception {
        return this.downloadBill(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：对账单下载<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付<br>
     * 其他：无论是否成功都返回Map。若成功，返回的Map中含有return_code、return_msg、data，
     *      其中return_code为`SUCCESS`，data为对账单数据。
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return 经过封装的API返回数据
     * @throws Exception
     */
    public Map<String, String> downloadBill(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_DOWNLOADBILL_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.DOWNLOADBILL_URL_SUFFIX;
        }
        String respStr = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs).trim();
        Map<String, String> ret;
        // 出现错误，返回XML数据
        if (respStr.indexOf("<") == 0) {
            ret = WXPayUtil.xmlToMap(respStr);
        }
        else {
            // 正常返回csv数据
            ret = new HashMap<String, String>();
            ret.put("return_code", WXPayConstants.SUCCESS);
            ret.put("return_msg", "ok");
            ret.put("data", respStr);
        }
        return ret;
    }


    /**
     * 作用：交易保障<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> report(Map<String, String> reqData) throws Exception {
        return this.report(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：交易保障<br>
     * 场景：刷卡支付、公共号支付、扫码支付、APP支付
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> report(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_REPORT_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.REPORT_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return WXPayUtil.xmlToMap(respXml);
    }


    /**
     * 作用：转换短链接<br>
     * 场景：刷卡支付、扫码支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> shortUrl(Map<String, String> reqData) throws Exception {
        return this.shortUrl(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：转换短链接<br>
     * 场景：刷卡支付、扫码支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> shortUrl(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_SHORTURL_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.SHORTURL_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


    /**
     * 作用：授权码查询OPENID接口<br>
     * 场景：刷卡支付
     * @param reqData 向wxpay post的请求数据
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> authCodeToOpenid(Map<String, String> reqData) throws Exception {
        return this.authCodeToOpenid(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
    }


    /**
     * 作用：授权码查询OPENID接口<br>
     * 场景：刷卡支付
     * @param reqData 向wxpay post的请求数据
     * @param connectTimeoutMs 连接超时时间，单位是毫秒
     * @param readTimeoutMs 读超时时间，单位是毫秒
     * @return API返回数据
     * @throws Exception
     */
    public Map<String, String> authCodeToOpenid(Map<String, String> reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        String url;
        if (this.useSandbox) {
            url = WXPayConstants.SANDBOX_AUTHCODETOOPENID_URL_SUFFIX;
        }
        else {
            url = WXPayConstants.AUTHCODETOOPENID_URL_SUFFIX;
        }
        String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
        return this.processResponseXml(respXml);
    }


} // end class

package cn.stylefeng.guns.core.util.sdk;

import java.io.InputStream;

public abstract class WXPayConfig {



    /**
     * 获取 App ID
     *
     * @return App ID
     */
    abstract String getAppID();


    /**
     * 获取 Mch ID
     *
     * @return Mch ID
     */
    abstract String getMchID();


    /**
     * 获取 API **
     *
     * @return API**
     */
    abstract String getKey();


    /**
     * 获取商户证书内容
     *
     * @return 商户证书内容
     */
    abstract InputStream getCertStream();

    /**
     * HTTP(S) 连接超时时间，单位毫秒
     *
     * @return
     */
    public int getHttpConnectTimeoutMs() {
        return 6*1000;
    }

    /**
     * HTTP(S) 读数据超时时间，单位毫秒
     *
     * @return
     */
    public int getHttpReadTimeoutMs() {
        return 8*1000;
    }

    /**
     * 获取WXPayDomain, 用于多域名容灾自动切换
     * @return
     */
    abstract IWXPayDomain getWXPayDomain();

    /**
     * 是否自动上报。
     * 若要关闭自动上报，子类中实现该函数返回 false 即可。
     *
     * @return
     */
    public boolean shouldAutoReport() {
        return true;
    }

    /**
     * 进行健康上报的线程的数量
     *
     * @return
     */
    public int getReportWorkerNum() {
        return 6;
    }


    /**
     * 健康上报缓存消息的最大数量。会有线程去独立上报
     * 粗略计算：加入一条消息200B，10000消息占用空间 2000 KB，约为2MB，可以接受
     *
     * @return
     */
    public int getReportQueueMaxSize() {
        return 10000;
    }

    /**
     * 批量上报，一次最多上报多个数据
     *
     * @return
     */
    public int getReportBatchSize() {
        return 10;
    }

}

package cn.stylefeng.guns.core.util.sdk;

import org.apache.http.client.HttpClient;

/**
 * 常量
 */
public class WXPayConstants {

    public enum SignType {
        MD5, HMACSHA256
    }

    public static final String DOMAIN_API = "api.mch.weixin.qq.com";
    public static final String DOMAIN_API2 = "api2.mch.weixin.qq.com";
    public static final String DOMAIN_APIHK = "apihk.mch.weixin.qq.com";
    public static final String DOMAIN_APIUS = "apius.mch.weixin.qq.com";

    public static final String TRANSFERS_URL_SUFFIX = "/mmpaymkttransfers/promotion/transfers";
    public static final String SANDBOX_SENDREDPACK_URL_SUFFIX = "/sandboxnew/mmpaymkttransfers/sendredpack";
    public static final String SANDBOX_TRANSFERS_URL_SUFFIX = "/sandboxnew/mmpaymkttransfers/promotion/transfers";

    public static final String FAIL = "FAIL";
    public static final String SUCCESS = "SUCCESS";
    public static final String HMACSHA256 = "HMAC-SHA256";
    public static final String MD5 = "MD5";

    public static final String FIELD_SIGN = "sign";
    public static final String FIELD_SIGN_TYPE = "sign_type";

    public static final String WXPAYSDK_VERSION = "WXPaySDK/3.0.9";
    public static final String USER_AGENT = WXPAYSDK_VERSION +
            " (" + System.getProperty("os.arch") + " " + System.getProperty("os.name") + " " + System.getProperty("os.version") +
            ") Java/" + System.getProperty("java.version") + " HttpClient/" + HttpClient.class.getPackage().getImplementationVersion();

    public static final String MICROPAY_URL_SUFFIX = "/pay/micropay";
    public static final String UNIFIEDORDER_URL_SUFFIX = "/pay/unifiedorder";
    public static final String ORDERQUERY_URL_SUFFIX = "/pay/orderquery";
    public static final String REVERSE_URL_SUFFIX = "/secapi/pay/reverse";
    public static final String CLOSEORDER_URL_SUFFIX = "/pay/closeorder";
    public static final String REFUND_URL_SUFFIX = "/secapi/pay/refund";
    public static final String REFUNDQUERY_URL_SUFFIX = "/pay/refundquery";
    public static final String DOWNLOADBILL_URL_SUFFIX = "/pay/downloadbill";
    public static final String REPORT_URL_SUFFIX = "/payitil/report";
    public static final String SHORTURL_URL_SUFFIX = "/tools/shorturl";
    public static final String AUTHCODETOOPENID_URL_SUFFIX = "/tools/authcodetoopenid";

    // sandbox
    public static final String SANDBOX_MICROPAY_URL_SUFFIX = "/sandboxnew/pay/micropay";
    public static final String SANDBOX_UNIFIEDORDER_URL_SUFFIX = "/sandboxnew/pay/unifiedorder";
    public static final String SANDBOX_ORDERQUERY_URL_SUFFIX = "/sandboxnew/pay/orderquery";
    public static final String SANDBOX_REVERSE_URL_SUFFIX = "/sandboxnew/secapi/pay/reverse";
    public static final String SANDBOX_CLOSEORDER_URL_SUFFIX = "/sandboxnew/pay/closeorder";
    public static final String SANDBOX_REFUND_URL_SUFFIX = "/sandboxnew/secapi/pay/refund";
    public static final String SANDBOX_REFUNDQUERY_URL_SUFFIX = "/sandboxnew/pay/refundquery";
    public static final String SANDBOX_DOWNLOADBILL_URL_SUFFIX = "/sandboxnew/pay/downloadbill";
    public static final String SANDBOX_REPORT_URL_SUFFIX = "/sandboxnew/payitil/report";
    public static final String SANDBOX_SHORTURL_URL_SUFFIX = "/sandboxnew/tools/shorturl";
    public static final String SANDBOX_AUTHCODETOOPENID_URL_SUFFIX = "/sandboxnew/tools/authcodetoopenid";

}

package cn.stylefeng.guns.core.util.sdk;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
import org.apache.http.util.EntityUtils;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;

/**
 * 交易保障
 */
public class WXPayReport {

    public static class ReportInfo {

        /**
         * 布尔变量使用int。0为false， 1为true。
         */

        // 基本信息
        private String version = "v1";
        private String sdk = WXPayConstants.WXPAYSDK_VERSION;
        private String uuid;  // 交易的标识
        private long timestamp;   // 上报时的时间戳，单位秒
        private long elapsedTimeMillis; // 耗时，单位 毫秒

        // 针对主域名
        private String firstDomain;  // 第1次请求的域名
        private boolean primaryDomain; //是否主域名
        private int firstConnectTimeoutMillis;  // 第1次请求设置的连接超时时间，单位 毫秒
        private int firstReadTimeoutMillis;  // 第1次请求设置的读写超时时间，单位 毫秒
        private int firstHasDnsError;  // 第1次请求是否出现dns问题
        private int firstHasConnectTimeout; // 第1次请求是否出现连接超时
        private int firstHasReadTimeout; // 第1次请求是否出现连接超时

        public ReportInfo(String uuid, long timestamp, long elapsedTimeMillis, String firstDomain, boolean primaryDomain, int firstConnectTimeoutMillis, int firstReadTimeoutMillis, boolean firstHasDnsError, boolean firstHasConnectTimeout, boolean firstHasReadTimeout) {
            this.uuid = uuid;
            this.timestamp = timestamp;
            this.elapsedTimeMillis = elapsedTimeMillis;
            this.firstDomain = firstDomain;
            this.primaryDomain = primaryDomain;
            this.firstConnectTimeoutMillis = firstConnectTimeoutMillis;
            this.firstReadTimeoutMillis = firstReadTimeoutMillis;
            this.firstHasDnsError = firstHasDnsError?1:0;
            this.firstHasConnectTimeout = firstHasConnectTimeout?1:0;
            this.firstHasReadTimeout = firstHasReadTimeout?1:0;
         }

        @Override
        public String toString() {
            return "ReportInfo{" +
                    "version='" + version + '\'' +
                    ", sdk='" + sdk + '\'' +
                    ", uuid='" + uuid + '\'' +
                    ", timestamp=" + timestamp +
                    ", elapsedTimeMillis=" + elapsedTimeMillis +
                    ", firstDomain='" + firstDomain + '\'' +
                    ", primaryDomain=" + primaryDomain +
                    ", firstConnectTimeoutMillis=" + firstConnectTimeoutMillis +
                    ", firstReadTimeoutMillis=" + firstReadTimeoutMillis +
                    ", firstHasDnsError=" + firstHasDnsError +
                    ", firstHasConnectTimeout=" + firstHasConnectTimeout +
                    ", firstHasReadTimeout=" + firstHasReadTimeout +
                    '}';
        }

        /**
         * 转换成 csv 格式
         *
         * @return
         */
        public String toLineString(String key) {
            String separator = ",";
            Object[] objects = new Object[] {
                version, sdk, uuid, timestamp, elapsedTimeMillis,
                    firstDomain, primaryDomain, firstConnectTimeoutMillis, firstReadTimeoutMillis,
                    firstHasDnsError, firstHasConnectTimeout, firstHasReadTimeout
            };
            StringBuffer sb = new StringBuffer();
            for(Object obj: objects) {
                sb.append(obj).append(separator);
            }
            try {
                String sign = WXPayUtil.HMACSHA256(sb.toString(), key);
                sb.append(sign);
                return sb.toString();
            }
            catch (Exception ex) {
                return null;
            }

        }

    }

    private static final String REPORT_URL = "http://report.mch.weixin.qq.com/wxpay/report/default";
    // private static final String REPORT_URL = "http://127.0.0.1:5000/test";


    private static final int DEFAULT_CONNECT_TIMEOUT_MS = 6*1000;
    private static final int DEFAULT_READ_TIMEOUT_MS = 8*1000;

    private LinkedBlockingQueue<String> reportMsgQueue = null;
    private WXPayConfig config;
    private ExecutorService executorService;

    private volatile static WXPayReport INSTANCE;

    private WXPayReport(final WXPayConfig config) {
        this.config = config;
        reportMsgQueue = new LinkedBlockingQueue<String>(config.getReportQueueMaxSize());

        // 添加处理线程
        executorService = Executors.newFixedThreadPool(config.getReportWorkerNum(), new ThreadFactory() {
            public Thread newThread(Runnable r) {
                Thread t = Executors.defaultThreadFactory().newThread(r);
                t.setDaemon(true);
                return t;
            }
        });

        if (config.shouldAutoReport()) {
            WXPayUtil.getLogger().info("report worker num: {}", config.getReportWorkerNum());
            for (int i = 0; i < config.getReportWorkerNum(); ++i) {
                executorService.execute(new Runnable() {
                    public void run() {
                        while (true) {
                            // 先用 take 获取数据
                            try {
                                StringBuffer sb = new StringBuffer();
                                String firstMsg = reportMsgQueue.take();
                                WXPayUtil.getLogger().info("get first report msg: {}", firstMsg);
                                String msg = null;
                                sb.append(firstMsg); //会阻塞至有消息
                                int remainNum = config.getReportBatchSize() - 1;
                                for (int j=0; j<remainNum; ++j) {
                                    WXPayUtil.getLogger().info("try get remain report msg");
                                    // msg = reportMsgQueue.poll();  // 不阻塞了
                                    msg = reportMsgQueue.take();
                                    WXPayUtil.getLogger().info("get remain report msg: {}", msg);
                                    if (msg == null) {
                                        break;
                                    }
                                    else {
                                        sb.append("\n");
                                        sb.append(msg);
                                    }
                                }
                                // 上报
                                WXPayReport.httpRequest(sb.toString(), DEFAULT_CONNECT_TIMEOUT_MS, DEFAULT_READ_TIMEOUT_MS);
                            }
                            catch (Exception ex) {
                                WXPayUtil.getLogger().warn("report fail. reason: {}", ex.getMessage());
                            }
                        }
                    }
                });
            }
        }

    }

    /**
     * 单例，双重校验，请在 JDK 1.5及更高版本中使用
     *
     * @param config
     * @return
     */
    public static WXPayReport getInstance(WXPayConfig config) {
        if (INSTANCE == null) {
            synchronized (WXPayReport.class) {
                if (INSTANCE == null) {
                    INSTANCE = new WXPayReport(config);
                }
            }
        }
        return INSTANCE;
    }

    public void report(String uuid, long elapsedTimeMillis,
                       String firstDomain, boolean primaryDomain, int firstConnectTimeoutMillis, int firstReadTimeoutMillis,
                       boolean firstHasDnsError, boolean firstHasConnectTimeout, boolean firstHasReadTimeout) {
        long currentTimestamp = WXPayUtil.getCurrentTimestamp();
        ReportInfo reportInfo = new ReportInfo(uuid, currentTimestamp, elapsedTimeMillis,
                firstDomain, primaryDomain, firstConnectTimeoutMillis, firstReadTimeoutMillis,
                firstHasDnsError, firstHasConnectTimeout, firstHasReadTimeout);
        String data = reportInfo.toLineString(config.getKey());
        WXPayUtil.getLogger().info("report {}", data);
        if (data != null) {
            reportMsgQueue.offer(data);
        }
    }


    @Deprecated
    private void reportSync(final String data) throws Exception {
        httpRequest(data, DEFAULT_CONNECT_TIMEOUT_MS, DEFAULT_READ_TIMEOUT_MS);
    }

    @Deprecated
    private void reportAsync(final String data) throws Exception {
        new Thread(new Runnable() {
            public void run() {
                try {
                    httpRequest(data, DEFAULT_CONNECT_TIMEOUT_MS, DEFAULT_READ_TIMEOUT_MS);
                }
                catch (Exception ex) {
                    WXPayUtil.getLogger().warn("report fail. reason: {}", ex.getMessage());
                }
            }
        }).start();
    }

    /**
     * http 请求
     * @param data
     * @param connectTimeoutMs
     * @param readTimeoutMs
     * @return
     * @throws Exception
     */
    private static String httpRequest(String data, int connectTimeoutMs, int readTimeoutMs) throws Exception {
        BasicHttpClientConnectionManager connManager;
        connManager = new BasicHttpClientConnectionManager(
                RegistryBuilder.<ConnectionSocketFactory>create()
                        .register("http", PlainConnectionSocketFactory.getSocketFactory())
                        .register("https", SSLConnectionSocketFactory.getSocketFactory())
                        .build(),
                null,
                null,
                null
        );
        HttpClient httpClient = HttpClientBuilder.create()
                .setConnectionManager(connManager)
                .build();

        HttpPost httpPost = new HttpPost(REPORT_URL);

        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(readTimeoutMs).setConnectTimeout(connectTimeoutMs).build();
        httpPost.setConfig(requestConfig);

        StringEntity postEntity = new StringEntity(data, "UTF-8");
        httpPost.addHeader("Content-Type", "text/xml");
        httpPost.addHeader("User-Agent", WXPayConstants.USER_AGENT);
        httpPost.setEntity(postEntity);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        return EntityUtils.toString(httpEntity, "UTF-8");
    }

}

package cn.stylefeng.guns.core.util.sdk;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.DefaultHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import java.io.InputStream;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
import java.security.KeyStore;
import java.security.SecureRandom;

import static cn.stylefeng.guns.core.util.sdk.WXPayConstants.USER_AGENT;

public class WXPayRequest {
    private WXPayConfig config;
    public WXPayRequest(WXPayConfig config) throws Exception {

        this.config = config;
    }

    /**
     * 请求，只请求一次，不做重试
     * @param domain
     * @param urlSuffix
     * @param uuid
     * @param data
     * @param connectTimeoutMs
     * @param readTimeoutMs
     * @param useCert 是否使用证书，针对退款、撤销等操作
     * @return
     * @throws Exception
     */
    private String requestOnce(final String domain, String urlSuffix, String uuid, String data, int connectTimeoutMs, int readTimeoutMs, boolean useCert) throws Exception {
        BasicHttpClientConnectionManager connManager;
        if (useCert) {
            // 证书
            char[] password = config.getMchID().toCharArray();
            InputStream certStream = config.getCertStream();
            KeyStore ks = KeyStore.getInstance("PKCS12");
            ks.load(certStream, password);

            // 实例化**库 & 初始化**工厂
            KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
            kmf.init(ks, password);

            // 创建 SSLContext
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(kmf.getKeyManagers(), null, new SecureRandom());

            SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(
                    sslContext,
                    new String[]{"TLSv1"},
                    null,
                    new DefaultHostnameVerifier());

            connManager = new BasicHttpClientConnectionManager(
                    RegistryBuilder.<ConnectionSocketFactory>create()
                            .register("http", PlainConnectionSocketFactory.getSocketFactory())
                            .register("https", sslConnectionSocketFactory)
                            .build(),
                    null,
                    null,
                    null
            );
        }
        else {
            connManager = new BasicHttpClientConnectionManager(
                    RegistryBuilder.<ConnectionSocketFactory>create()
                            .register("http", PlainConnectionSocketFactory.getSocketFactory())
                            .register("https", SSLConnectionSocketFactory.getSocketFactory())
                            .build(),
                    null,
                    null,
                    null
            );
        }

        HttpClient httpClient = HttpClientBuilder.create()
                .setConnectionManager(connManager)
                .build();

        String url = "https://" + domain + urlSuffix;
        HttpPost httpPost = new HttpPost(url);

        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(readTimeoutMs).setConnectTimeout(connectTimeoutMs).build();
        httpPost.setConfig(requestConfig);

        StringEntity postEntity = new StringEntity(data, "UTF-8");
        httpPost.addHeader("Content-Type", "text/xml");
        httpPost.addHeader("User-Agent", USER_AGENT + " " + config.getMchID());
        httpPost.setEntity(postEntity);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        return EntityUtils.toString(httpEntity, "UTF-8");

    }


    private String request(String urlSuffix, String uuid, String data, int connectTimeoutMs, int readTimeoutMs, boolean useCert, boolean autoReport) throws Exception {
        Exception exception = null;
        long elapsedTimeMillis = 0;
        long startTimestampMs = WXPayUtil.getCurrentTimestampMs();
        boolean firstHasDnsErr = false;
        boolean firstHasConnectTimeout = false;
        boolean firstHasReadTimeout = false;
        IWXPayDomain.DomainInfo domainInfo = config.getWXPayDomain().getDomain(config);
        if(domainInfo == null){
            throw new Exception("WXPayConfig.getWXPayDomain().getDomain() is empty or null");
        }
        try {
            String result = requestOnce(domainInfo.domain, urlSuffix, uuid, data, connectTimeoutMs, readTimeoutMs, useCert);
            elapsedTimeMillis = WXPayUtil.getCurrentTimestampMs()-startTimestampMs;
            config.getWXPayDomain().report(domainInfo.domain, elapsedTimeMillis, null);
            WXPayReport.getInstance(config).report(
                    uuid,
                    elapsedTimeMillis,
                    domainInfo.domain,
                    domainInfo.primaryDomain,
                    connectTimeoutMs,
                    readTimeoutMs,
                    firstHasDnsErr,
                    firstHasConnectTimeout,
                    firstHasReadTimeout);
            return result;
        }
        catch (UnknownHostException ex) {  // dns 解析错误，或域名不存在
            exception = ex;
            firstHasDnsErr = true;
            elapsedTimeMillis = WXPayUtil.getCurrentTimestampMs()-startTimestampMs;
            WXPayUtil.getLogger().warn("UnknownHostException for domainInfo {}", domainInfo);
            WXPayReport.getInstance(config).report(
                    uuid,
                    elapsedTimeMillis,
                    domainInfo.domain,
                    domainInfo.primaryDomain,
                    connectTimeoutMs,
                    readTimeoutMs,
                    firstHasDnsErr,
                    firstHasConnectTimeout,
                    firstHasReadTimeout
            );
        }
        catch (ConnectTimeoutException ex) {
            exception = ex;
            firstHasConnectTimeout = true;
            elapsedTimeMillis = WXPayUtil.getCurrentTimestampMs()-startTimestampMs;
            WXPayUtil.getLogger().warn("connect timeout happened for domainInfo {}", domainInfo);
            WXPayReport.getInstance(config).report(
                    uuid,
                    elapsedTimeMillis,
                    domainInfo.domain,
                    domainInfo.primaryDomain,
                    connectTimeoutMs,
                    readTimeoutMs,
                    firstHasDnsErr,
                    firstHasConnectTimeout,
                    firstHasReadTimeout
            );
        }
        catch (SocketTimeoutException ex) {
            exception = ex;
            firstHasReadTimeout = true;
            elapsedTimeMillis = WXPayUtil.getCurrentTimestampMs()-startTimestampMs;
            WXPayUtil.getLogger().warn("timeout happened for domainInfo {}", domainInfo);
            WXPayReport.getInstance(config).report(
                    uuid,
                    elapsedTimeMillis,
                    domainInfo.domain,
                    domainInfo.primaryDomain,
                    connectTimeoutMs,
                    readTimeoutMs,
                    firstHasDnsErr,
                    firstHasConnectTimeout,
                    firstHasReadTimeout);
        }
        catch (Exception ex) {
            exception = ex;
            elapsedTimeMillis = WXPayUtil.getCurrentTimestampMs()-startTimestampMs;
            WXPayReport.getInstance(config).report(
                    uuid,
                    elapsedTimeMillis,
                    domainInfo.domain,
                    domainInfo.primaryDomain,
                    connectTimeoutMs,
                    readTimeoutMs,
                    firstHasDnsErr,
                    firstHasConnectTimeout,
                    firstHasReadTimeout);
        }
        config.getWXPayDomain().report(domainInfo.domain, elapsedTimeMillis, exception);
        throw exception;
    }


    /**
     * 可重试的，非双向认证的请求
     * @param urlSuffix
     * @param uuid
     * @param data
     * @return
     */
    public String requestWithoutCert(String urlSuffix, String uuid, String data, boolean autoReport) throws Exception {
        return this.request(urlSuffix, uuid, data, config.getHttpConnectTimeoutMs(), config.getHttpReadTimeoutMs(), false, autoReport);
    }

    /**
     * 可重试的，非双向认证的请求
     * @param urlSuffix
     * @param uuid
     * @param data
     * @param connectTimeoutMs
     * @param readTimeoutMs
     * @return
     */
    public String requestWithoutCert(String urlSuffix, String uuid, String data, int connectTimeoutMs, int readTimeoutMs, boolean autoReport) throws Exception {
        return this.request(urlSuffix, uuid, data, connectTimeoutMs, readTimeoutMs, false, autoReport);
    }

    /**
     * 可重试的，双向认证的请求
     * @param urlSuffix
     * @param uuid
     * @param data
     * @return
     */
    public String requestWithCert(String urlSuffix, String uuid, String data, boolean autoReport) throws Exception {
        return this.request(urlSuffix, uuid, data, config.getHttpConnectTimeoutMs(), config.getHttpReadTimeoutMs(), true, autoReport);
    }

    /**
     * 可重试的，双向认证的请求
     * @param urlSuffix
     * @param uuid
     * @param data
     * @param connectTimeoutMs
     * @param readTimeoutMs
     * @return
     */
    public String requestWithCert(String urlSuffix, String uuid, String data, int connectTimeoutMs, int readTimeoutMs, boolean autoReport) throws Exception {
        return this.request(urlSuffix, uuid, data, connectTimeoutMs, readTimeoutMs, true, autoReport);
    }
}

package cn.stylefeng.guns.core.util.sdk;

import org.w3c.dom.Document;

import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

/**
 * 2018/7/3
 */
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();
    }
}

五、微信支付成功后的回调接口，必须是外网可以访问的。

    /**
     *微信支付回调
     */
    @RequestMapping("notify")
    public String notify(HttpServletRequest request) {
        log.info("================================================开始处理微信小程序发送的异步通知");

        //1 获取微信支付异步回调结果
        String xmlResult = WeiXinPayUtil.getPostStr(request);

        Map<String, String> resultMap = null;
        try {
            //将结果转成map
            resultMap = WXPayUtil.xmlToMap(xmlResult);
        } catch (Exception e1) {
            e1.printStackTrace();
        }
        //订单号
        String orderNo = resultMap.get("out_trade_no");
        log.info("订单号：------------------"+orderNo+"结束----------");
        String result_code = resultMap.get("result_code");
        //回调返回的加密签名 保存下来 下面会进行对比
        String sign = resultMap.get("sign");
        //去掉sign和利用微信回调回来的信息重新加密
        resultMap.remove("sign");
        String sign1="";
        try {
            //重新加密 获取加密的签名
            sign1=WXPayUtil.generateSignature(resultMap,  ConstantUtil.partnerKey); //签名
        }catch (Exception e){
            log.error("失败",e);
        }


        String resultCode;
        String resultMsg;
        //对比微信回调的加密与重新加密是否一致  一致即为通过 不一致说明呗改动过 加密不通过
        log.info("==============================================开始对比加密++++++++++++++++++++++++++++++++++++++");
        if (sign.equals(sign1)) { //验签通过
            log.info("==============================================验签通过++++++++++++++++++++++++++++++++++++++");

            if (resultMap.get("result_code").equals("SUCCESS")) {//业务结果为SUCCESS
                /**
                 * 这里写你要处理的逻辑
                 */
                resultCode = "SUCCESS";
                resultMsg = "成功";
            } else { // 业务结果为FALL
                resultCode = "FAIL";
                resultMsg = "业务结果为FAIL";
            }
        } else {
            resultCode = "FAIL";
            resultMsg = "验签未通过";
        }
        Map<String, String> returnMap = new HashMap<>();
        returnMap.put("return_code", resultCode);
        returnMap.put("return_msg", resultMsg);
        try {
            String s = WXPayUtil.mapToXml(returnMap);
            return s;
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }

就只能帮到这里了，如有不会或者哪地方有疑问，请评论，本博主24小时在线解答。用到的工具类都在这里了。少的话请评论区评论。