Android微信支付获取二次签名Sign的方法

本文实例为大家分享了android微信支付获取二次签名sign的方法，供大家参考，具体内容如下

/**
  * 获取sign签名
  * 
  * @return
  */
 private string genpayreq() {

  // 获取参数的值
  payreq request = new payreq();
  request.appid = constantsmember.app_id;
  request.partnerid = constantsmember.mchid;
  request.prepayid = mprepayid;
  request.packagevalue = "sign=wxpay";
  request.noncestr = datautil.getguid();
  request.timestamp = datautil.gettimestamp();

  // 把参数的值传进去sortedmap集合里面
  sortedmap<object, object> parameters = new treemap<object, object>();
//  {appid=wx34df375d7dae8c90, noncestr=3bf34ef2ca4a462db8d4ea48e785cdc3, 
//    package=sign=wxpay, partnerid=1349967601, 
//    prepayid=wx2016070910354542c7155d4e0846850809, timestamp=1468031760}
  parameters.put("appid", request.appid);
  parameters.put("noncestr", request.noncestr);
  parameters.put("package", request.packagevalue);
  parameters.put("partnerid", request.partnerid);
  parameters.put("prepayid", request.prepayid);
  parameters.put("timestamp", request.timestamp);

  string characterencoding = "utf-8";
  string mysign = createsign(characterencoding, parameters);
  system.out.println("我的签名是：" + mysign);
  return mysign;
 }

 /**
  * 微信支付签名算法sign
  * 
  * @param characterencoding
  * @param parameters
  * @return
  */
 public static string createsign(string characterencoding,
   sortedmap<object, object> parameters) {

  stringbuffer sb = new stringbuffer();
  set es = parameters.entryset();// 所有参与传参的参数按照accsii排序（升序）
  iterator it = es.iterator();
  while (it.hasnext()) {
   @suppresswarnings("rawtypes")
   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=" + constantsmember.key); //key是商户秘钥
  string sign = md5util.md5encode(sb.tostring(), characterencoding)
    .touppercase();
  return sign; // d3a5d13e7838e1d453f4f2ea526c4766
      // d3a5d13e7838e1d453f4f2ea526c4766
 }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。