Java micro-letter payment-micro-letter Red Envelope _java

The use of micro-letter red envelopes has been very extensive, this article introduces the case of micro-letter red envelopes, the need to have a certified public number, and opened a micro-letter payment, merchant platform and opened the cash red envelopes the right to.

Https://pay.weixin.qq.com Merchant Landing address. Choose to view the cash bonus in the marketing center

Https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter=13_1 Cash Red Envelopes official Website Document description

Let's look at a few simple tests. The premise needs you to go to the merchant platform to recharge first. Pre-payment is not supported. This paper only sums up the call and realization of the interface of the micro-letter cash red envelopes. You should implement how to invoke the interface according to your business.

The general red envelopes in the Https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter=13_4&index=3 document have all the explanations. Calls must have a certificate for the merchant platform.

The parameters that are required are also listed. Decide according to your own needs.

1.java Package a red Envelope object

 /** 

*
 @author small 帅帅丶
 * @date 2016-8-17 morning 11:12:19
 * Open source China Http://my.oschina.net/xshuai
 * * Public
class Redpack implements serializable{
 private string sign//validation
 private string Mch_billno based on property; /order number
 private string mch_id//merchant number private string wxappid//
 Micro letter AppID
 private string send_name;//merchant name
 private string re_openid;//user OpenID
 private string total_amount;//payment amount
 private string total_num;// Red Envelope Recipients Cash red envelopes can only be 1
 private string wishing;//red Envelope Blessings
 private string client_ip;//invoke the IP
 private String act of the interface machine _name;//Activity name
 private string remark;//memo
 private string nonce_str;//random string
    //set get ellipsis
}

2. The required tool class Createbillno is to generate the merchant order number website document requirements as follows:

/** *
 @author small 帅帅丶
 * @date 2016-8-17 morning 11:12:19
 * Open source China Http://my.oschina.net/xshuai
 * * Public
class Redpackutil {
 /**
 * Generates merchant order number
 * @param mch_id merchant number *
 @param userId The user's userId
 * @ret Urn
 /public static String Createbillno () {
 //composition: mch_id+yyyymmdd+10 digits that cannot be duplicated
 in one day 10-bit digital implementations that cannot be duplicated in a single day are as follows:
 //Because each user binds the userId, their userId are different, plus a randomly generated (10-length (USERID)) to ensure that the 10-digit number is not the same as the
 Date dt=new Date ();
 SimpleDateFormat df = new SimpleDateFormat ("YYYYMMDD");
 String nowtime= df.format (DT);
 int length = ten;
 Return wxconstants.mch_id + nowtime + getrandomnum (length);
 }
 /**
 * Generate a specific number of random digits
 * @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);
 }
 return val;
 }
}

3. The previous work is very simple required certificate and merchant number there. And the merchant platform has the amount to test the cash red envelope interface

Redpack pack = new Redpack (null//first time is empty, redpackutil.createbillno ()//Merchant order number,
  "your own merchant number", "Public number AppID", "name",
  " To send the user's OpenID "," send the amount of units is divided into 1 yuan for example 100, "Only 1", "9", "127.0.0.1",
  "activity name", "remark", "random string");

The test is empty except for sign. All others can be populated. Now we generate sign signatures and generate sign according to the parameters in the Pack object;

Specific Signature Algorithm Https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter=4_3 the address of the official website

https://pay.weixin.qq.com/wiki/tools/signverify/can compare this test page to see if the encryption is consistent.

String signs = signature.getsign (pack);
The generated signset into the Pack object
pack.setsign (signs);
Converting an object to an XML lattice requires XML format
String XML = Xmlutil.objtoxml (Pack,redpack.class, "xml");

4. Send Red envelopes

Redpackservice service = new Redpacservice ();
    String result = Service.redpackorder (XML);//Request returned data is successful

public class redpackservice{/** * Red Packet Interface address/private final static String redp_order_path= "https://api.mch.weixin.qq.c
 Om/mmpaymkttransfers/sendredpack "; /** * Need certificate * @param paramxml * @return * * public static String Redpackorder (String paramxml) {try {Wxbas
 
  EService service=new Wxbaseservice (Redp_order_path);
  
 Return Service.sendpost (Paramxml);
 catch (Exception e) {log.error (e.tostring ());
 return null;
   }/** * via HTTPS to API post XML data * * @param URL API address * @param xmlobj the XML data object to submit * @return API back to the actual data of the package * @throws IOException * @throws keystoreexception * @throws unrecoverablekeyexception * @throws Nosuchalgorithme Xception * @throws keymanagementexception */public string sendpost (string url, String postdataxml) throws Ioexce  Ption, Keystoreexception, Unrecoverablekeyexception, nosuchalgorithmexception, keymanagementexception {if (!hasInit)
    {init ();

    String result = null; HttpPost HttpPost = new HttpPost (URL); Resolves XStream bug//XStream Xstreamforrequestpostdata = new XStream (New Domdriver ("UTF-8", New Xmlfriendlynamecod

    ER ("-_", "_"));

    The data object to be submitted to the API is converted into XML format data post to the API//String Postdataxml = Xstreamforrequestpostdata.toxml (xmlobj);
    Util.log ("Api,post Past data is:");

    Util.log (Postdataxml);
    It is indicated that the use of UTF-8 encoding, otherwise to the API server XML in Chinese can not be successfully identified stringentity postentity = new Stringentity (postdataxml, "UTF-8");
    Httppost.addheader ("Content-type", "Text/xml");

    Httppost.setentity (postentity);

    Set the configuration of the requestor 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"); 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;

 }

5. Returned XML to see if success due to only recharge 1 yuan a few days ago has been tested to send so return the following information

<xml>
<return_code><![ Cdata[success]]></return_code>
<return_msg><![ cdata[account balance is insufficient, please go to the merchant platform to recharge and try again]]></return_msg>
<result_code><![ Cdata[fail]]></result_code>
<err_code><![ Cdata[notenough]]></err_code>
<err_code_des><![ cdata[account balance is insufficient, please go to the merchant platform to recharge and try again]]></err_code_des>
<mch_billno><![ Cdata[1371729102201629220149762756]]></mch_billno>
<mch_id><![ cdata[here is the merchant number in order to secure the deletion of]]></mch_id>
<wxappid><![ cdata[-appid]]></wxappid> public number
<re_openid><![ CDATA[OD5QQW8E_LBIAW9SZZUD-2XHTMVX This is the user's openid]]></re_openid>
<total_amount>100</total_ Amount>
</xml>

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