Java微信支付-微信红包

 /** * 红包对象 * @author 小帅帅丶 * @date 2016-8-17上午11:12:19 * @开源中国 http://my.oschina.net/xshuai */public class RedPack implements Serializable{ private String sign; //根据属性生成的验证 private String mch_billno; //订单号 private String mch_id; //商户号 private String wxappid; // 微信appid private String send_name;// 商户名称 private String re_openid;// 用户openid private String total_amount;// 付款金额 private String total_num;//红包接收人数 现金红包只能是 1 private String wishing;// 红包祝福语 private String client_ip;// 调用接口机器的IP private String act_name;// 活动名称 private String remark;// 备注 private String nonce_str;// 随机字符串    //set get省略}

/** * 红包工具类 * @author 小帅帅丶 * @date 2016-8-17上午11:12:19 * @开源中国 http://my.oschina.net/xshuai */public class RedPackUtil { /** * 生成商户订单号 * @param mch_id 商户号 * @param userId 该用户的userID * @return */ public static String createBillNo(){ //组成： mch_id+yyyymmdd+10位一天内不能重复的数字 //10位一天内不能重复的数字实现方法如下: //因为每个用户绑定了userId,他们的userId不同,加上随机生成的(10-length(userId))可保证这10位数字不一样 Date dt=new Date(); SimpleDateFormat df = new SimpleDateFormat("yyyymmdd"); String nowTime= df.format(dt); int length = 10 ; return WXConstants.MCH_ID + nowTime + getRandomNum(length); } /** * 生成特定位数的随机数字 * @param length * @return */ public static String getRandomNum(int length) { String val = ""; Random random = new Random(); for (int i = 0; i < length; i++) {  val += String.valueOf(random.nextInt(10)); } return val; }}

RedPack pack = new RedPack(null//第一次为空, RedPackUtil.createBillNo()//商户订单号,  "你自己的商户号", "公众号的appid", "名称",  "要发送用户的openid", "发送金额 单位是分 例如100 则是1元RMB", "只能是1", "9", "127.0.0.1",  "活动名称", "备注", "随机字符串");

String signs = Signature.getSign(pack);//生成的signset到pack对象中pack.setSign(signs);//将对象转为xml格式 微信要求xml格式String xml = XmlUtil.objToXml(pack,RedPack.class,"xml");

RedPackService service = new RedPacService();    String result = service.redpackOrder(xml);//请求返回的数据是否成功

public class RedPackService{ /** * 红包接口地址 */ private final static String REDP_ORDER_PATH="https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack"; /** * 红包 * 需要证书 * @param paramXml * @return */ public static String redpackOrder(String paramXml){ try {    WXBaseService service=new WXBaseService(REDP_ORDER_PATH);   return service.sendPost(paramXml);   } catch (Exception e) {    log.error(e.toString()); }  return null; }} /**   * 通过Https往API post xml数据   *   * @param url  API地址   * @param xmlObj 要提交的XML数据对象   * @return API回包的实际数据   * @throws IOException   * @throws KeyStoreException   * @throws UnrecoverableKeyException   * @throws NoSuchAlgorithmException   * @throws KeyManagementException   */  public String sendPost(String url, String postDataXML) throws IOException, KeyStoreException, UnrecoverableKeyException, NoSuchAlgorithmException, KeyManagementException {    if (!hasInit) {      init();    }    String result = null;    HttpPost httpPost = new HttpPost(url);    //解决XStream对出现双下划线的bug//    XStream xStreamForRequestPostData = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));    //将要提交给API的数据对象转换成XML格式数据Post给API//    String postDataXML = xStreamForRequestPostData.toXML(xmlObj);    Util.log("API，POST过去的数据是：");    Util.log(postDataXML);    //得指明使用UTF-8编码，否则到API服务器XML的中文不能被成功识别    StringEntity postEntity = new StringEntity(postDataXML, "UTF-8");    httpPost.addHeader("Content-Type", "text/xml");    httpPost.setEntity(postEntity);    //设置请求器的配置    httpPost.setConfig(requestConfig);    Util.log("executing request" + httpPost.getRequestLine());    try {      HttpResponse response = httpClient.execute(httpPost);      HttpEntity entity = response.getEntity();      result = EntityUtils.toString(entity, "UTF-8");    } catch (ConnectionPoolTimeoutException e) {      log.e("http get throw ConnectionPoolTimeoutException(wait time out)");    } catch (ConnectTimeoutException e) {      log.e("http get throw ConnectTimeoutException");    } catch (SocketTimeoutException e) {      log.e("http get throw SocketTimeoutException");    } catch (Exception e) {      log.e("http get throw Exception");    } finally {      httpPost.abort();    }    return result;  }

<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[帐号余额不足，请到商户平台充值后再重试]]></return_msg><result_code><![CDATA[FAIL]]></result_code><err_code><![CDATA[NOTENOUGH]]></err_code><err_code_des><![CDATA[帐号余额不足，请到商户平台充值后再重试]]></err_code_des><mch_billno><![CDATA[1371729102201629220149762756]]></mch_billno><mch_id><![CDATA[这里是商户号为了保密删除了]]></mch_id><wxappid><![CDATA[微信公众号appid]]></wxappid><re_openid><![CDATA[od5qQw8E_LbiAW9sZzuD-2xHtmvx这个是用户的openid]]></re_openid><total_amount>100</total_amount></xml>