发放规则

普通红包：一次只发给一个用户

注：红包金额大于200时，请求参数scene_id必传（使用的场景需在商户平台--产品中心--现金红包--产品设置中设置，设置金额的有效期为一个月，下面程序用到的场景id为PRODUCT_5:渠道分润，该场景的金额最大设置值为4999）

接口调用请求说明

请求参数

数据示例：

接口详情参考链接：https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter=13_4&index=3

java代码示例：

String currTime = TenpayUtil.getCurrTime();//8位日期String strTime = currTime.substring(8, currTime.length());//四位随机数String strRandom = TenpayUtil.buildRandom(4) + "";String str=currTime.substring(0, currTime.length()-6);//10位序列号,可以自行调整。String strReq = strTime + strRandom;String nonce_str=strReq;//随机字符串String mch_id="10016225";//商户号String mch_billno=mch_id+str+strReq;//商户订单号String wxappid="wx1ccccccccccc6f";//公众账号appidString send_name="shanghuming";//商户名称（微信红包发送者名称,最好用英文）String re_openid="oYxxxxxxdcdcddddddddc";//用户openIdint total_amount=100;//付款金额int total_num=1;//红包发放总人数String wishing="happy";//红包祝福语String client_ip="192.168.1.00";//ip地址String act_name="ceshiactivity";//活动名称String remark="ceshi";String scene_id="PRODUCT_5";//场景idString key="aaaaaaaaaaaaaaa";//商户号API密钥SortedMap<String, String> packageParams = new TreeMap<String, String>();packageParams.put("act_name", act_name);packageParams.put("client_ip", client_ip);packageParams.put("mch_billno", mch_billno);packageParams.put("mch_id", mch_id);packageParams.put("nonce_str",nonce_str);packageParams.put("remark", remark);packageParams.put("re_openid", re_openid);packageParams.put("send_name", send_name);packageParams.put("scene_id", scene_id);packageParams.put("total_amount", String.valueOf(total_amount));packageParams.put("total_num", String.valueOf(total_num));packageParams.put("wishing", wishing);packageParams.put("wxappid", wxappid);//生成签名String sign = createSign(packageParams,key,"UTF-8");String xmlTest="<xml>"+ "<act_name>"+act_name+"</act_name>"+ "<client_ip>"+client_ip+"</client_ip>"+ "<mch_billno>"+mch_billno+"</mch_billno>"+ "<mch_id>"+mch_id+"</mch_id>"+ "<nonce_str>"+nonce_str+"</nonce_str>"+ "<remark>"+remark+"</remark>"+ "<re_openid>"+re_openid+"</re_openid>"+ "<send_name>"+send_name+"</send_name>"+ "<scene_id>"+scene_id+"</scene_id>"+ "<total_amount>"+total_amount+"</total_amount>"+ "<total_num>"+total_num+"</total_num>"+ "<wxappid>"+wxappid+"</wxappid>"+ "<wishing>"+wishing+"</wishing>"+ "<sign>"+sign+"</sign>"+"</xml>";System.out.println(xmlTest);String notify_url="https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack";String prepay_id="";try {prepay_id =reqPost(notify_url, xmlTest);if(prepay_id.contains("成功")){request.setAttribute("SUCCESSMsg", "微信红包支付接口成功");response.sendRedirect("success.jsp");}else{request.setAttribute("ErrorMsg", "微信红包支付接口出错");response.sendRedirect("error.jsp");}} catch (Exception e1) {// TODO Auto-generated catch blocke1.printStackTrace();}

获取签名：

public String createSign(SortedMap<String, String> paraMap,String key,String charset) {StringBuffer sb = new StringBuffer();Set es = paraMap.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 (null != v && !"".equals(v) && !"sign".equals(k)&& !"key".equals(k)) {sb.append(k + "=" + v + "&");}}sb.append("key=" + key);System.out.println("===========签名参数====="+sb.toString());String sign = MD5Util.MD5Encode(sb.toString(), "UTF-8").toUpperCase();System.out.println("===========生成的签名是====="+sign);return sign;}

请求微信红包接口：

public String reqPost(String url,String xmlParam) throws Exception{KeyStore keyStore  = KeyStore.getInstance("PKCS12");//读取商户证书（我下载下来的证书保存到D盘，根据自己实际情况填写）FileInputStream instream = new FileInputStream(new File("D:/10016225.p12"));try {keyStore.load(instream, "10016225".toCharArray());} finally {instream.close();}// Trust own CA and all self-signed certsSSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, "10016225".toCharArray()).build();// Allow TLSv1 protocol onlySSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,new String[] { "TLSv1" },null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();HttpPost httpPost = new HttpPost(url);CloseableHttpResponse response1;String prepay_id = "";try {httpPost.setEntity(new StringEntity(xmlParam));response1 = httpclient.execute(httpPost);try {int status = response1.getStatusLine().getStatusCode();if(status>=200&&status<400){System.out.println(response1.getStatusLine());HttpEntity entity1 = response1.getEntity();String jsonStr = EntityUtils.toString(entity1, "UTF-8");Map<String, Object> dataMap = new HashMap<String, Object>();System.out.println("返回数据："+jsonStr);if(jsonStr.indexOf("FAIL")!=-1){return prepay_id;}//我的项目的编码为GBK,再次改编码防止乱码出错jsonStr=new String(jsonStr.getBytes("UTF-8"), "GBK");Map map = doXMLParse(jsonStr);String return_code  = (String) map.get("return_code");if("SUCCESS".equals(return_code)){prepay_id  = (String) map.get("return_msg");}}return prepay_id;} catch (Exception e) {e.printStackTrace();} finally {response1.close();}} catch (ClientProtocolException e1) {e1.printStackTrace();} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}return null;}/*** 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。* @param strxml* @return* @throws JDOMException* @throws IOException*/public static Map doXMLParse(String strxml) throws Exception {if(null == strxml || "".equals(strxml)) {return null;}Map m = new HashMap();InputStream in = new ByteArrayInputStream(strxml.getBytes());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);}//关闭流in.close();return m;}