Micro-Credit Payment H5 call payment details (Java version) _java

The recent project needs micro-letter payment, and then looked at the micro-letter public number to pay, although not difficult, but the details still need to pay attention to, with a large half a day to write a demo, and a complete test of the payment process, the following share the micro-trust payment experience.

I. Allocation of public number micro-letter payment

We need to configure the micro-credit public number payment address and test white list.

For example: Pay JS page address for http://www.xxx.com/shop/pay/

Then configure www.xxx.com/shop/pay/here

Second, the development process

Using the micro-credit payment API (address Http://pay.weixin.qq.com/wiki/doc/api/index.PHP?chapter=7_4), we need to develop a red-flagged. As follows:

Third, to the micro-trust server to place orders

Call the unified next single interface so that you can obtain the prepay_id (http://pay.weixin.qq.com/wiki/doc/api/index.php?chapter=9_1) for the micro-letter payment.

There are several fields before calling this interface H5 payment must be filled in OpenID

3.1 Get OpenID

Available via Web page authorization form (http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html)

Send the following link in the micro-letter
Https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx520c15f417810387&redirect_uri= to jump the order of the url& Response_type=code&scope=snsapi_base&state=123#wechat_redirect

3.2 Order Acquisition prepay_id

The code is, in effect, sending an XML file via post to get the prepay_id sent over from the micro-trust server.

Import Java.io.ByteArrayInputStream; 
Import javaioioexception; 
Import Javaioinputstream; 
Import javaiounsupportedencodingexception; 
Import Javautildate; 
Import Javautilhashmap; 
Import Javautiliterator; 
Import Javautilmap; 
Import Javautilmapentry; 
 
Import Javautilrandom; 
Import Javaxservlethttphttpservletrequest; 
 
Import Javaxservlethttphttpservletresponse; 
Import Orgapachecommonscodecdigestdigestutils; 
Import Orgspringframeworkstereotypecontroller; 
Import orgspringframeworkwebbindannotationrequestmapping; 
Import Orgxmlpullvxmlpullparser; 
Import orgxmlpullvxmlpullparserexception; 
 
Import Orgxmlpullvxmlpullparserfactory; 
Import Comfasterxmljacksondatabindjsonnode; 
Import Comgsonoauthoauth; 
Import Comgsonoauthpay; 
Import Comgsonutilhttpkit; 
Import Comsyutildatetimeutil; 
 
Import Comsyutiljsonutil; @Controller @RequestMapping ("/pay") public class Wxpaycontroller {@RequestMapping (value = ' wxprepaydo ') public void Jspay (HttpServletRequest request, HttpSErvletresponse response, String callback) throws Exception {//get OpenID String OpenID = Sessionutilgetatt (reque 
    St, "OpenId"); 
    if (OpenID = null) {OpenID = Getuseropenid (request); 
    } String AppID = "WX16691FCB0523C1A4"; 
     
    String Paternerkey = "iningfeng1234567fdfwfdfd1ss234567"; 
    String out_trade_no = Gettradeno (); 
    map<string, string> paramap = new hashmap<string, string> (); 
    Paramapput ("AppID", AppID); 
    Paramapput ("Attach", "test"); 
    Paramapput ("Body", "Test purchase Payment"); 
    Paramapput ("mch_id", "10283271"); 
    Paramapput ("Nonce_str", Create_nonce_str ()); 
    Paramapput ("OpenID", OpenID); 
    Paramapput ("Out_trade_no", out_trade_no); 
    Paramapput ("Spbill_create_ip", Getaddrip (Request)); 
    Paramapput ("Total_fee", "1"); 
    Paramapput ("Trade_type", "Jsapi"); 
    Paramapput ("Notify_url", "http://wwwxxxco/bank/page/wxnotify"); 
    String sign = getsign (Paramap, Paternerkey); 
 
Paramapput ("sign", sign);    Unify the next single https://apimchweixinqqcom/pay/unifiedorder String url = "Https://apimchweixinqqcom/pay/unifiedorder"; 
 
    String XML = Arraytoxml (Paramap); 
 
    String xmlstr = httpkitpost (URL, XML); 
 
    Prepaid Commodity id String prepay_id = ""; 
      if (Xmlstrindexof ("SUCCESS")!=-1) {map<string, string> Map = Doxmlparse (XMLSTR); 
    prepay_id = (String) mapget ("prepay_id"); 
    } map<string, string> paymap = new hashmap<string, string> (); 
    Paymapput ("AppId", appId); 
    Paymapput ("TimeStamp", Create_timestamp ()); 
    Paymapput ("Noncestr", Create_nonce_str ()); 
    Paymapput ("Signtype", "MD5"); 
    Paymapput ("Package", "prepay_id=" + prepay_id); 
     
    String paysign = getsign (Paymap, Paternerkey); 
    Paymapput ("PG", prepay_id); 
     
     
    Paymapput ("Paysign", paysign); Webutilresponse (response, Webutilpackjsonp (callback, Jsonutilwarpjsonnoderesponse ( 
  Paymap)) (toString)); } 
 
  /** 
   *MAP to XML * * @param arr * @return/public String arraytoxml (map<string, string> arr) {STR 
 
    ing XML = "<xml>"; 
    Iterator<entry<string, string>> iter = Arrentryset () iterator (); 
      while (Iterhasnext ()) {entry<string, string> Entry = Iternext (); 
      String key = Entrygetkey (); 
      String val = Entrygetvalue (); 
    XML + + "<" + key + ">" + val + "</" + key + ">"; 
    XML = = "</xml>"; 
  return XML; }//Get OpenID private string Getuseropenid (HttpServletRequest request) throws Exception {String code = Reque 
    Stgetparameter ("code"); 
      if (code = NULL) {String OpenID = Requestgetparameter ("OpenID"); 
    return to OpenId; 
    } Oauth o = new Oauth (); 
    String token = ogettoken (code); 
    Jsonnode node = jsonutilstringtojsonnode (token); 
    String openId = Nodeget ("OpenID") Astext (); 
  return to OpenId; 
 Private String Create_nonce_str () {     String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; 
      String res = ""; 
        for (int i = 0; i < i++) {Random rd = new Random (); 
      Res + Charscharat (Rdnextint (Charslength ()-1)); 
  return res; 
  Private String Getaddrip (HttpServletRequest request) {return requestgetremoteaddr (); 
  Private String Create_timestamp () {return longtostring (Systemcurrenttimemillis ()/1000); private String Gettradeno () {string timestamp = Datetimeutilformatdate (new Date (), Datetimeutildatetime_patt 
    ERN); 
  Return "Hzno" + timestamp; Private String getsign (map<string, string> params, String paternerkey) throws Unsupportedencodingex 
    ception {String string1 = Paycreatesign (params, false); 
    String stringsigntemp = string1 + "&key=" + paternerkey; 
    String Signvalue = Digestutilsmd5hex (stringsigntemp) touppercase (); 
  return signvalue; 
 
}  Private map<string, string> doxmlparse (String xml) throws Xmlpullparserexception, IOException {Inpu 
 
    Tstream InputStream = new Bytearrayinputstream (Xmlgetbytes ()); 
 
    map<string, string> map = null; 
 
    Xmlpullparser Pullparser = xmlpullparserfactorynewinstance () newpullparser (); Pullparsersetinput (InputStream, "UTF-8"); 
 
    Sets the XML data int eventtype = Pullparsergeteventtype () to parse for XML; 
        while (EventType!= xmlpullparserend_document) {switch (eventtype) {case xmlpullparserstart_document: 
        Map = new hashmap<string, string> (); 
 
      Break 
        Case Xmlpullparserstart_tag:string key = Pullparsergetname (); 
 
        if (keyequals ("xml")) break; 
        String value = Pullparsernexttext (); 
 
        Mapput (key, value); 
 
      Break 
 
      Case Xmlpullparserend_tag:break; 
 
    } EventType = Pullparsernext (); 
  } return map; 
} 
 
} 

Iv. Payment of H5

H5 payment is actually very simple, only need to call the micro-letter embedded Browser JS method on the line (http://pay.weixin.qq.com/wiki/doc/api/index.php?chapter=7_7)

<%@ page language= "java" contenttype= "text/html; 
Charset=utf-8 "pageencoding=" UTF-8 "%> <%@ taglib prefix=" Spring "uri=" Http://wwwspringframeworkorg/tags "%> 
  <% String Path = Requestgetcontextpath (); 
String basepath = requestgetscheme () + "://" + requestgetservername () + ":" + requestgetserverport () + path + "/"; %> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML transitional//en" "HTTP://WWWWORG/TR/HTML4/LOOSEDTD" >  

The effect is as follows

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