我们先来看看公众号发放现金红包的效果:
需要调用商户平台的接口,接口发放规则如下:
1.发送频率限制——默认1800/min
2.发送个数上限——按照默认1800/min算
3.金额上限——根据传入场景id不同默认上限不同，可以在商户平台产品设置进行设置和申请，最大不大于4999元/个
4.其他的“量”上的限制还有哪些？——用户当天的领取上限次数,默认是10
5.如果量上满足不了我们的需求，如何提高各个上限？——金额上限和用户当天领取次数上限可以在商户平台进行设置
注意-红包金额大于200时，请求参数scene_id必传，参数说明见下文。
注意2-根据监管要求，新申请商户号使用现金红包需要满足两个条件：1、入驻时间超过90天 2、连续正常交易30天。
请求Url https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack
是否需要证书 是（证书及使用说明详见商户证书）
请求方式 POST
请求数据示例：
12345678910111213141516171819202122232425262728293031323334353637 posttime%3d123123412%26clientversion%3d234134%26mobile%3d122344545%26deviceid%3dIOS
接口需要调用商户平台的证书，证书需要去商户平台下载：
然后在接口中使用证书，首先我们新建一个WeixinSSL 类
@Componentpublic class WeiXinSSL { /** * 证书类型 */ @Value("${werchant.storekey}") private String storekey; /** * 文件路径 */ @Value("${werchant.ssLfile}") private String ssLfile; /** * 商户号 */ @Value("${werchant.merchantNumber}") private String merchantNumber; public String getStorekey() { return storekey; } public void setStorekey(String storekey) { this.storekey = storekey; } public String getSsLfile() { return ssLfile; } public void setSsLfile(String ssLfile) { this.ssLfile = ssLfile; } public String getMerchantNumber() { return merchantNumber; } public void setMerchantNumber(String merchantNumber) { this.merchantNumber = merchantNumber; } }1234567891011121314151617181920212223242526272829303132333435363738394041424344454647封装HttpClientSSL 类实现 https 请求加证书:
@Componentpublic class HttpClientSSL { @Autowired private WeiXinSSL weiXinSSL; // 请求超时时间(毫秒) 5秒 public static RequestConfig requestConfig; // 响应超时时间(毫秒) 60秒 public static int HTTP_RESPONSE_TIMEOUT = 60 * 1000; // httpClient字符编码 public static String encoding = "UTF-8"; public static RequestConfig getRequestConfig() { return RequestConfig.custom().setConnectTimeout(5 * 1000) .setConnectionRequestTimeout(HTTP_RESPONSE_TIMEOUT).build(); } public static void setRequestConfig(RequestConfig requestConfig) { HttpClientSSL.requestConfig = requestConfig; } /** * https请求伪造证书 * @return */ public CloseableHttpClient defaultSSLClient() { SSLContext sslContext = null; try { new SSLContextBuilder().loadTrustMaterial(null,new TrustStrategy(){ @Override public boolean isTrusted(X509Certificate[] chain, String authType) throws java.security.cert.CertificateException { return false; } }); } catch (NoSuchAlgorithmException | KeyStoreException e) { e.printStackTrace(); } SSLConnectionSocketFactory factory = new SSLConnectionSocketFactory(sslContext); return HttpClients.custom().setSSLSocketFactory(factory).build(); } /** * https请求加证书 * @return */ public CloseableHttpClient defaultSSLClientFile() { if (this.weiXinSSL == null){ return this.defaultSSLClient(); } FileInputStream inputStream = null; KeyStore keyStore = null; try { // ssl类型 keyStore = KeyStore.getInstance(weiXinSSL.getStorekey()); // ssl文件 inputStream = new FileInputStream(weiXinSSL.getSsLfile()); // 设置ssl密码 keyStore.load(inputStream,weiXinSSL.getMerchantNumber().toCharArray()); } catch (KeyStoreException | NoSuchAlgorithmException | CertificateException | IOException e1) { e1.printStackTrace(); } finally { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } SSLContext sslContext = null; try { sslContext = SSLContexts.custom().loadKeyMaterial(keyStore,weiXinSSL.getMerchantNumber().toCharArray()).build(); } catch (UnrecoverableKeyException | NoSuchAlgorithmException | KeyStoreException | KeyManagementException e) { e.printStackTrace(); } SSLConnectionSocketFactory factory = new SSLConnectionSocketFactory(sslContext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER); return HttpClients.custom().setSSLSocketFactory(factory).build(); } /** * 封装发送请求的方法 * @throws UnsupportedEncodingException */ public String send(String url, String data, CloseableHttpClient closeableHttpClient) throws UnsupportedEncodingException { CloseableHttpClient client = closeableHttpClient; HttpPost httpPost = new HttpPost(URLDecoder.decode(url, encoding)); httpPost.addHeader("Connection", "keep-alive"); httpPost.addHeader("Accept", "*/*"); httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); httpPost.addHeader("Host", "api.mch.weixin.qq.com"); httpPost.addHeader("X-Requested-With", "XMLHttpRequest"); httpPost.addHeader("Cache-Control", "max-age=0"); httpPost.addHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0) "); httpPost.setConfig(this.getRequestConfig());// 设置超时时间 CloseableHttpResponse response = null; // 参数放入 StringEntity entity = new StringEntity(data, encoding); entity.setContentEncoding(encoding); entity.setContentType("application/xml"); httpPost.setEntity(entity); try { response = client.execute(httpPost); if (response.getStatusLine().getStatusCode() == 200) { HttpEntity httpEntity = (HttpEntity) response.getEntity(); if (response != null) { return EntityUtils.toString(httpEntity,encoding); } } } catch (IOException e) { e.printStackTrace(); } return null; }} 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130这样我们就封装了一个https请求加证书的实体类，接下来我们生成请求微信红包接口：
https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack 的参数签名：
/*** 红包参数实体类* @throws UnsupportedEncodingException*/@Componentpublic class SendRedPack implements Serializable{ /** * */ private static final long serialVersionUID = -1000489228099916099L; private String nonce_str;// 随机字符串 private String sign;// 签名 private String mch_billno;// 商户订单号 private String mch_id;// 商户号 private String wxappid;// 公众账号 private String send_name;// 商户名称 private String re_openid;// 用户 private int total_amount;// 付款金额 单位：分 private int total_num;// 红包发放总人数 private String wishing;// 红包祝福语 private String client_ip;// Ip地址 private String act_name;// 活动名称 private String remark;// 备注 public String getNonce_str() { return nonce_str; } public void setNonce_str(String nonce_str) { this.nonce_str = nonce_str; } public String getSign() { return sign; } public void setSign(String sign) { this.sign = sign; } public String getMch_billno() { return mch_billno; } public void setMch_billno(String mch_billno) { this.mch_billno = mch_billno; } public String getMch_id() { return mch_id; } public void setMch_id(String mch_id) { this.mch_id = mch_id; } public String getWxappid() { return wxappid; } public void setWxappid(String wxappid) { this.wxappid = wxappid; } public String getSend_name() { return send_name; } public void setSend_name(String send_name) { this.send_name = send_name; } public String getRe_openid() { return re_openid; } public void setRe_openid(String re_openid) { this.re_openid = re_openid; } public int getTotal_amount() { return total_amount; } public void setTotal_amount(int total_amount) { this.total_amount = total_amount; } public int getTotal_num() { return total_num; } public void setTotal_num(int total_num) { this.total_num = total_num; } public String getWishing() { return wishing; } public void setWishing(String wishing) { this.wishing = wishing; } public String getClient_ip() { return client_ip; } public void setClient_ip(String client_ip) { this.client_ip = client_ip; } public String getAct_name() { return act_name; } public void setAct_name(String act_name) { this.act_name = act_name; } public String getRemark() { return remark; } public void setRemark(String remark) { this.remark = remark; }}123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104接下来是发送红包的控制器：
/*** 领红包控制器* @author zengliang*/@Controller@RequestMapping(value="/redenveLopesReceive")public class RedEnvelopesReceiveController { //微信唯一标识 @Value("${weixin.appid}") private String appid; //微信开发者密码标识 @Value("${weixin.appsecret}") public String appsecret; @Autowired private SendRedPack sendredpack; @Autowired private HttpClientSSL httpclientssl; /** * 发送XML参数 * @author zengliang */ @ResponseBody @RequestMapping(value="/sendXml") public String sendXml(String openid,Long redenveLopes_id ,String mch_billno){ RedenveLopes redenve = redenveLopesService.findOne(redenveLopes_id); XMLUtil xmlUtil= new XMLUtil(); sendredpack.setAct_name(redenve.getAct_name()); sendredpack.setNonce_str(xmlUtil.random()); sendredpack.setRe_openid(openid); sendredpack.setClient_ip(redenve.getClient_ip()); sendredpack.setMch_billno(mch_billno); sendredpack.setMch_id(redenve.getMch_id()); String xx = redenve.getRemark(); sendredpack.setRemark(StringUtils.isEmpty(xx) == false?xx:"空"); sendredpack.setSend_name(redenve.getSend_name()); sendredpack.setTotal_amount(redenve.getTotal_amount()); sendredpack.setTotal_num(redenve.getTotal_num()); sendredpack.setWishing(redenve.getWishing()); sendredpack.setWxappid(redenve.getWxappidxx()); //生成签名 String params = this.createSendRedPackOrderSign(sendredpack,redenve.getStore_key()); sendredpack.setSign(params); xmlUtil.xstream().alias("xml",sendredpack.getClass()); //扩展xstream，使其支持CDATA块 String requestXml = xmlUtil.xstream().toXML(sendredpack); String result; try { result = httpclientssl.send("https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack",requestXml,httpclientssl.defaultSSLClientFile()); System.out.println("成功返回值"+result); return result; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return null; }/** * 生成签名 * @param redPack * @return */ public String createSendRedPackOrderSign(SendRedPack redPack,String storekey){ StringBuffer sign = new StringBuffer(); sign.append("act_name=").append(redPack.getAct_name()); sign.append("&client_ip=").append(redPack.getClient_ip()); sign.append("&mch_billno=").append(redPack.getMch_billno()); sign.append("&mch_id=").append(redPack.getMch_id()); sign.append("&nonce_str=").append(redPack.getNonce_str()); sign.append("&re_openid=").append(redPack.getRe_openid()); sign.append("&remark=").append(redPack.getRemark()); sign.append("&send_name=").append(redPack.getSend_name()); sign.append("&total_amount=").append(redPack.getTotal_amount()); sign.append("&total_num=").append(redPack.getTotal_num()); sign.append("&wishing=").append(redPack.getWishing()); sign.append("&wxappid=").append(redPack.getWxappid()); sign.append("&key=").append(storekey); return DigestUtils.md5Hex(sign.toString()).toUpperCase(); }}12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091然后我们需要用一个解析XML的工具类实现解析微信返回的XML
/*** 解析XML工具类* @author zengliang*/@Componentpublic class XMLUtil { /** * 解析微信返回的XML * @param xml * @return * @throws Exception */ @SuppressWarnings("unchecked") public Map parseXml(String xml)throws Exception { Map map = new HashMap(); Document doc = null; try { doc = DocumentHelper.parseText(xml); // 将字符串转为XML Element rootElt = doc.getRootElement(); // 获取根节点 List list = rootElt.elements();//获取根节点下所有节点 for (Element element : list) { //遍历节点 map.put(element.getName(), element.getText()); //节点的name为map的key，text为map的value } } catch (DocumentException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return map; } /** * 扩展xstream，使其支持CDATA块 */ private XStream xstream = new XStream(new XppDriver(new NoNameCoder()) { @Override public HierarchicalStreamWriter createWriter(Writer out) { return new PrettyPrintWriter(out) { // 对所有xml节点的转换都增加CDATA标记 boolean cdata = true; @Override @SuppressWarnings("rawtypes") public void startNode(String name, Class clazz) { super.startNode(name, clazz); } @Override public String encodeNode(String name) { return name; } @Override protected void writeText(QuickWriter writer, String text) { if (cdata) { writer.write(""); } else { writer.write(text); } } }; } }); private XStream inclueUnderlineXstream = new XStream(new DomDriver(null,new XmlFriendlyNameCoder("_-", "_"))); public XStream getXstreamInclueUnderline() { return inclueUnderlineXstream; } public XStream xstream() { return xstream; } /** * 生成随机数 * @return */ public String random(){ String random = UUID.randomUUID().toString().replace("-", ""); return random; }}12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182 然后我们调用 sendXML 方法公众号就能向用户发送红包了。
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