JAVA微信小程序支付以及提現（企業向用戶支付）

JAVA微信小程序支付以及提現（企業向用戶支付）工具類等都給全了

支付

微信官方文檔
https://pay.weixin.qq.com/wiki/doc/api/wxa/wxa_sl_api.php?chapter=7_7&index=5
開發前準備好
1.appId
2.密鑰(小程序配置界面)
3.商戶號
4.api密鑰(商家後臺自己設置)

依賴pom.xml

        <!-- json轉換 -->
        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.58</version>
        </dependency>
  
        <dependency>
            <groupId>org.jdom</groupId>
            <artifactId>jdom</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.surefire</groupId>
            <artifactId>maven-surefire-common</artifactId>
            <version>2.22.2</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.jettison</groupId>
            <artifactId>jettison</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.jdom</groupId>
            <artifactId>jdom</artifactId>
            <version>1.1</version>
        </dependency>

控制層Controller

    /**
     * 獲取微信支付簽名
     * 作者wx1023732997
     */
    @RequestMapping(value = "/payment", method = {RequestMethod.GET, RequestMethod.POST})
    @ResponseBody
    public SortedMap<Object, Object> WapSignSignatureAction(HttpServletRequest request, String code, String total_fee, String orderno,
                                                            String tName, HttpServletResponse response) throws Exception {
        SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
        // code作爲換取access_token的票據，每次用戶授權帶上的code將不一樣，code只能使用一次，5分鐘未被使用自動過期。
        // 通過code換取網頁授權access_token
        String grant_type = "authorization_code";
        //////////////// 1、向微信服務器 使用登錄憑證 code 獲取 session_key 和 openid ////////////////
        //請求參數
        String params = "appid=" + APPID + "&secret=" + AppSecret + "&js_code=" + code + "&grant_type=" + grant_type;
        //發送請求
        String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params);
        //解析相應內容（轉換成json對象）
        JSONObject json = JSONObject.parseObject(sr);
        //獲取會話密鑰（session_key）
        String session_key = json.get("session_key").toString();
        //用戶的唯一標識（openid）
        String openid = (String) json.get("openid");
        String nonce_str = create_nonce_str();
        String timestamp = create_timestamp();
        // 獲取prepayId
        try {
            String result = getPrepayId(request, tName, orderno, total_fee, openid);
            Map<String, String> map = doXMLParse(result);
            // 重新生成簽名
            parameters.put("appId", APPID);
            parameters.put("timeStamp", timestamp);
            parameters.put("nonceStr", nonce_str);
            parameters.put("package", "prepay_id=" + map.get("prepay_id"));
            parameters.put("signType", "MD5");
            String sign = createSign("UTF-8", parameters);
            parameters.put("prepay_id", "prepay_id=" + map.get("prepay_id"));
            parameters.put("paySign", sign);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return parameters;
    }
    

Service層

public class PaymentService {
    public static final String APPID = "****";      //服務號APPID
    public static final String AppSecret = "****";  //服務號AppSecret
    public static final String MCH_ID = "*****";     //支付商戶號
    public static final String API_KEY = "*******";    //API密鑰


    /**
     * 發起https請求並獲取結果
     *
     * @param requestUrl    請求地址
     * @param requestMethod 請求方式（GET、POST）
     * @param outputStr     提交的數據
     * @return JSONObject(通過JSONObject.get ( key)的方式獲取json對象的屬性值)
     */
    public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
        JSONObject jsonObject = null;
        StringBuffer buffer = new StringBuffer();
        try {
            // 創建SSLContext對象，並使用我們指定的信任管理器初始化
            TrustManager[] tm = {new MyX509TrustManager()};
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new SecureRandom());
            // 從上述SSLContext對象中得到SSLSocketFactory對象
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
            httpUrlConn.setSSLSocketFactory(ssf);
            httpUrlConn.setDoOutput(true);
            httpUrlConn.setDoInput(true);
            httpUrlConn.setUseCaches(false);
            // 設置請求方式（GET/POST）
            httpUrlConn.setRequestMethod(requestMethod);

            if ("GET".equalsIgnoreCase(requestMethod))
                httpUrlConn.connect();

            // 當有數據需要提交時
            if (null != outputStr) {
                OutputStream outputStream = httpUrlConn.getOutputStream();
                // 注意編碼格式，防止中文亂碼
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }

            // 將返回的輸入流轉換成字符串
            InputStream inputStream = httpUrlConn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String str = null;
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }
            bufferedReader.close();
            inputStreamReader.close();
            // 釋放資源
            inputStream.close();
            inputStream = null;
            httpUrlConn.disconnect();
            jsonObject = JSONObject.fromObject(buffer.toString());
        } catch (ConnectException ce) {
            System.err.println("Weixin server connection timed out.");
        } catch (Exception e) {
            System.err.println("https request error");
        }
        return jsonObject;
    }

    public static String getPrepayId(HttpServletRequest request, String name, String orderno, String total_fee, String openid) throws Exception {
        SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
        parameters.put("appid", APPID);
        parameters.put("mch_id", MCH_ID);
        parameters.put("nonce_str", CreateNoncestr());
        parameters.put("body", name);
        parameters.put("out_trade_no", orderno);// 訂單號
        parameters.put("total_fee", total_fee);// 支付金額單位：分
        parameters.put("spbill_create_ip", getIp2(request));
        parameters.put("notify_url", "支付成功回調地址");
        parameters.put("trade_type", "JSAPI");
        parameters.put("openid", openid);//openid :需填寫
        parameters.put("time_expire", "");// 交易結束時間,需要動態傳入,格式爲yyyyMMddHHmmss
        String sign = createSign("UTF-8", parameters);
        parameters.put("sign", sign);
        String requestXML = getRequestXml(parameters);
        //調用統一下單接口
        String result = httpsRequest("https://api.mch.weixin.qq.com/pay/unifiedorder", "POST", requestXML);
        System.out.println(result);
        return result;
    }

    public static String getPrepayno(HttpServletRequest request, String partner_trade_no, String amount, String openid,
                                     String check_name, String re_user_name, String desc) throws Exception {
        SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
        parameters.put("mch_appid", APPID);
        parameters.put("mchid", MCH_ID);
        parameters.put("nonce_str", CreateNoncestr());
        parameters.put("partner_trade_no", partner_trade_no);// 訂單號
        parameters.put("amount", amount);// 支付金額單位：分
        parameters.put("spbill_create_ip", getIp2(request));
        parameters.put("notify_url", "支付成功回調地址");
        parameters.put("trade_type", "JSAPI");
        parameters.put("openid", openid);//openid :需填寫
        parameters.put("check_name", check_name);
        parameters.put("re_user_name", re_user_name);
        parameters.put("desc", desc);
        parameters.put("time_expire", "");// 交易結束時間,需要動態傳入,格式爲yyyyMMddHHmmss
        String sign = createSign("UTF-8", parameters);
        parameters.put("sign", sign);
        String requestXML = getRequestXml(parameters);
        //調用統一下單接口
        String result = httpsRequest("https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers", "POST", requestXML);
        System.out.println(result);
        return result;
    }

    public static String CreateNoncestr() {
        String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        String res = "";
        for (int i = 0; i < 16; i++) {
            Random rd = new Random();
            res += chars.charAt(rd.nextInt(chars.length() - 1));
        }
        return res;
    }

    public static String getIp2(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");
        if (!StringUtils.isEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
            // 多次反向代理後會有多個ip值，第一個ip纔是真實ip
            int index = ip.indexOf(",");
            if (index != -1) {
                return ip.substring(0, index);
            } else {
                return ip;
            }
        }
        ip = request.getHeader("X-Real-IP");
        if (!StringUtils.isEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
            return ip;
        }
        return request.getRemoteAddr();
    }

    @SuppressWarnings("rawtypes")
    public static String createSign(String characterEncoding, SortedMap<Object, Object> parameters) {
        StringBuffer sb = new StringBuffer();
        Set es = parameters.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = (String) entry.getKey();
            Object v = entry.getValue();
            if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
                sb.append(k + "=" + v + "&");
            }
        }
        sb.append("key=" + API_KEY);
        String sign = MD5Encode(sb.toString(), characterEncoding).toUpperCase();
        return sign;
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));
        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};

    @SuppressWarnings("rawtypes")
    public static String getRequestXml(SortedMap<Object, Object> parameters) {
        StringBuffer sb = new StringBuffer();
        sb.append("<xml>");
        Set es = parameters.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 ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {
                sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">");
            } else {
                sb.append("<" + k + ">" + v + "</" + k + ">");
            }
        }
        sb.append("</xml>");
        return sb.toString();
    }

    /**
     * 發送https請求
     *
     * @param requestUrl    請求地址
     * @param requestMethod 請求方式（GET、POST）
     * @param outputStr     提交的數據
     * @return 返回微信服務器響應的信息
     */
    public static String httpsRequest(String requestUrl, String requestMethod,
                                      String outputStr) {
        try {
            // 創建SSLContext對象，並使用我們指定的信任管理器初始化
            TrustManager[] tm = {new MyX509TrustManager()};
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new SecureRandom());
            // 從上述SSLContext對象中得到SSLSocketFactory對象
            SSLSocketFactory ssf = sslContext.getSocketFactory();
            URL url = new URL(requestUrl);
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setSSLSocketFactory(ssf);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            // 設置請求方式（GET/POST）
            conn.setRequestMethod(requestMethod);
            conn.setRequestProperty("content-type",
                    "application/x-www-form-urlencoded");
            // 當outputStr不爲null時向輸出流寫數據
            if (null != outputStr) {
                OutputStream outputStream = conn.getOutputStream();
                // 注意編碼格式
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }
            // 從輸入流讀取返回內容
            InputStream inputStream = conn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String str = null;
            StringBuffer buffer = new StringBuffer();
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }
            // 釋放資源
            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            inputStream = null;
            conn.disconnect();
            return buffer.toString();
        } catch (ConnectException ce) {
            System.out.println("連接超時");
        } catch (Exception e) {
            System.out.println("請求異常");
        }
        return null;
    }

    public static String create_nonce_str() {
        return UUID.randomUUID().toString();
    }

    public static String create_timestamp() {
        return Long.toString(System.currentTimeMillis() / 1000);
    }

    /**
     * 解析xml
     */
    public static Map doXMLParse(String strxml) throws Exception {
        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 = getChildrenText(children);
            }

            m.put(k, v);
        }
        // 關閉流
        in.close();
        return m;
    }

    /**
     * 獲取子結點的xml
     */
    public static String getChildrenText(List children) {
        StringBuffer sb = new StringBuffer();
        if (!children.isEmpty()) {
            Iterator it = children.iterator();
            while (it.hasNext()) {
                Element e = (Element) it.next();
                String name = e.getName();
                String value = e.getTextNormalize();
                List list = e.getChildren();
                sb.append("<" + name + ">");
                if (!list.isEmpty()) {
                    sb.append(getChildrenText(list));
                }
                sb.append(value);
                sb.append("</" + name + ">");
            }
        }
        return sb.toString();
    }


}

X509TrustManager類

package cn.shifen.utils;

import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

public class MyX509TrustManager  implements X509TrustManager {
    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
    }

    public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
    }

    public X509Certificate[] getAcceptedIssuers() {
        return null;
    }
}

HttpRequest類

package cn.shifen.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class HttpRequest {
    /**
     * 向指定URL發送GET方法的請求
     *
     * @param url   發送請求的URL
     * @param param 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
     * @return URL 所代表遠程資源的響應結果
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打開和URL之間的連接
            URLConnection connection = realUrl.openConnection();
            // 設置通用的請求屬性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立實際的連接
            connection.connect();
            // 獲取所有響應頭字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍歷所有的響應頭字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定義 BufferedReader輸入流來讀取URL的響應
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("發送GET請求出現異常！" + e);
            e.printStackTrace();
        }
        // 使用finally塊來關閉輸入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 向指定 URL 發送POST方法的請求
     *
     * @param url   發送請求的 URL
     * @param param 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
     * @return 所代表遠程資源的響應結果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打開和URL之間的連接
            URLConnection conn = realUrl.openConnection();
            // 設置通用的請求屬性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 發送POST請求必須設置如下兩行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 獲取URLConnection對象對應的輸出流
            out = new PrintWriter(conn.getOutputStream());
            // 發送請求參數
            out.print(param);
            // flush輸出流的緩衝
            out.flush();
            // 定義BufferedReader輸入流來讀取URL的響應
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("發送 POST 請求出現異常！" + e);
            e.printStackTrace();
        }
        //使用finally塊來關閉輸出流、輸入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
}

MD5Util類

package cn.shifen.utils;

import java.security.MessageDigest;

public class MD5Util {

    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
    

}

提現

官方文檔地址
https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_2
小程序提現需要下載證書
下載證書指南
https://kf.qq.com/faq/161222NneAJf161222U7fARv.html

控制層

//提現到零錢
    //https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_2
    @RequestMapping("/transfer")
    @ResponseBody
    public SortedMap<Object, Object> transfer(HttpServletRequest request, HttpServletResponse response) {

        String openid = request.getParameter("openid");
        String amount = request.getParameter("amount");
        String tk_order_id =  CommonUtils.getId();//只要數字或字母的不重複32位即可，建議uuid去_
        System.out.println(" == >> " + tk_order_id);
        String partner_trade_no = tk_order_id; //商戶訂單號
        String check_name = "NO_CHECK"; //校驗用戶姓名選項 (NO_CHECK：不校驗真實姓名 FORCE_CHECK：強校驗真實姓名)
        String re_user_name = "xxx"; //收款用戶姓名
        String desc = "xxx"; //企業付款備註
        SortedMap<Object, Object> parameters = new TreeMap<>();
        try {
            String result = getPrepayno(request, partner_trade_no, amount, openid, check_name, re_user_name, desc);
            Map<String, String> map = doXMLParse(result);
            parameters.put("appId", APPID);
            parameters.put("package", "prepay_id=" + map.get("prepay_id"));
            parameters.put("signType", "MD5");
            parameters.put("prepay_id", "prepay_id=" + map.get("prepay_id"));
            String sign = createSign("UTF-8", parameters);
            parameters.put("paySign", sign);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return parameters;
    }

提現的service已經在支付的service裏
請求參數，多看官方文檔