微信支付一 ：公众号支付1

微信公众号支付H5调用支付详解

最近项目需要微信支付，然后看了下微信公众号支付，，虽然不难，但是细节还是需要注意的，用了大半天时间写了个demo，并且完整的测试了一下支付流程，下面分享一下微信公众号支付的经验。

一、配置公众号微信支付  

   需要我们配置微信公众号支付地址和测试白名单。

  

     比如：支付JS页面的地址为 http://www.xxx.com/shop/pay/

            那此处配置www.xxx.com/shop/pay/

  二、开发流程

     借用微信公众号支付api(地址 http://pay.weixin.qq.com/wiki/doc/api/index.PHP?chapter=7_4)，我们需要开发的为红色标记出的。如下：

    

 

三、向微信服务器端下订单

             调用统一下单接口，这样就能获取微信支付的prepay_id（http://pay.weixin.qq.com/wiki/doc/api/index.php?chapter=9_1）。

     在调用该接口前有几个字段是H5支付必须填写的openid

    3.1 获取openid

         可以通过网页授权形式（http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html）

       在微信中发送如下链接

      

https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx520c15f417810387&redirect_uri=要跳转的下订单的url&response_type=code&scope=snsapi_base&state=123#wechat_redirect

   3.2 下订单获取prepay_id

    代码如下，实际上是通过post发送一个xml 文件，获取微信服务器端发送过来的prepay_id。

   

 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Random;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import org.apache.commons.codec.digest.DigestUtils;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlPullParserFactory;

 import com.fasterxml.jackson.databind.JsonNode;
 import com.gson.oauth.Oauth;
 import com.gson.oauth.Pay;
 import com.gson.util.HttpKit;
 import com.sy.util.DatetimeUtil;
 import com.sy.util.JsonUtil;

 @Controller
 @RequestMapping("/pay")
 public class WXPayController {

     @RequestMapping(value = "wxprepay.do")
     public void jspay(HttpServletRequest request, HttpServletResponse response, String callback) throws Exception {
         // 获取openid
         String openId = SessionUtil.getAtt(request, "openId");
         if (openId == null) {
             openId = getUserOpenId(request);
         }

         String appid = "wx16691fcb0523c1a4";
         String paternerKey = "ININGFENG1234567fdfwfdfd1ss234567";

         String out_trade_no = getTradeNo();
         Map paraMap = new HashMap();
         paraMap.put("appid", appid);
         paraMap.put("attach", "测试");
         paraMap.put("body", "测试购买支付");
         paraMap.put("mch_id", "10283271");
         paraMap.put("nonce_str", create_nonce_str());
         paraMap.put("openid", openId);
         paraMap.put("out_trade_no", out_trade_no);
         paraMap.put("spbill_create_ip", getAddrIp(request));
         paraMap.put("total_fee", "1");
         paraMap.put("trade_type", "JSAPI");
         paraMap.put("notify_url", "http://www.xxx.co/bank/page/wxnotify");
         String sign = getSign(paraMap, paternerKey);
         paraMap.put("sign", sign);

         // 统一下单 https://api.mch.weixin.qq.com/pay/unifiedorder
         String url = "https://api.mch.weixin.qq.com/pay/unifiedorder";

         String xml = ArrayToXml(paraMap);

         String xmlStr = HttpKit.post(url, xml);

         // 预付商品id
         String prepay_id = "";

         if (xmlStr.indexOf("SUCCESS") != -1) {
             Map map = doXMLParse(xmlStr);
             prepay_id = (String) map.get("prepay_id");
         }

         Map payMap = new HashMap();
         payMap.put("appId", appid);
         payMap.put("timeStamp", create_timestamp());
         payMap.put("nonceStr", create_nonce_str());
         payMap.put("signType", "MD5");
         payMap.put("package", "prepay_id=" + prepay_id);
         String paySign = getSign(payMap, paternerKey);

         payMap.put("pg", prepay_id);
         payMap.put("paySign", paySign);


         WebUtil.response(response, WebUtil.packJsonp(callback, JsonUtil.warpJsonNodeResponse(JsonUtil.objectToJsonNode(payMap)).toString()));
     }

     /**
      * map转成xml
      *
      * @param arr
      * @return
      */
     public String ArrayToXml(Map arr) {
         String xml = "";

         Iterator> iter = arr.entrySet().iterator();
         while (iter.hasNext()) {
             Entry entry = iter.next();
             String key = entry.getKey();
             String val = entry.getValue();
             xml += "<" + key + ">" + val + " + key + ">";
         }

         xml += "";
         return xml;
     }

     // 获取openId
     private String getUserOpenId(HttpServletRequest request) throws Exception {
         String code = request.getParameter("code");
         if (code == null) {
             String openId = request.getParameter("openId");
             return openId;
         }
         Oauth o = new Oauth();
         String token = o.getToken(code);
         JsonNode node = JsonUtil.StringToJsonNode(token);
         String openId = node.get("openid").asText();
         return openId;
     }

     private String create_nonce_str() {
             String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
             String res = "";
             for (int i = 0; i < 16; i++) {
                 Random rd = new Random();
                 res += chars.charAt(rd.nextInt(chars.length() - 1));
             }
             return res;
     }

     private String getAddrIp(HttpServletRequest request){
         return request.getRemoteAddr();
     }

     private String create_timestamp() {
         return Long.toString(System.currentTimeMillis() / 1000);
     }

     private String getTradeNo(){
         String timestamp = DatetimeUtil.formatDate(new Date(), DatetimeUtil.DATETIME_PATTERN);
         return "HZNO" + timestamp;
     }

     private String getSign(Map params, String paternerKey )
             throws UnsupportedEncodingException {
         String string1 = Pay.createSign(params, false);
         String stringSignTemp = string1 + "&key=" + paternerKey;
         String signValue = DigestUtils.md5Hex(stringSignTemp).toUpperCase();
         return  signValue;
     }

     private Map doXMLParse(String xml)
             throws XmlPullParserException, IOException {

         InputStream inputStream = new ByteArrayInputStream(xml.getBytes());

         Map map = null;

         XmlPullParser pullParser = XmlPullParserFactory.newInstance()
                 .newPullParser();

         pullParser.setInput(inputStream, "UTF-8"); // 为xml设置要解析的xml数据

         int eventType = pullParser.getEventType();

         while (eventType != XmlPullParser.END_DOCUMENT) {
             switch (eventType) {
             case XmlPullParser.START_DOCUMENT:
                 map = new HashMap();
                 break;

             case XmlPullParser.START_TAG:
                 String key = pullParser.getName();
                 if (key.equals("xml"))
                     break;

                 String value = pullParser.nextText();
                 map.put(key, value);

                 break;

             case XmlPullParser.END_TAG:
                 break;

             }

             eventType = pullParser.next();

         }

         return map;
     }

 }

四、H5支付

      H5支付其实很简单，只需要调用微信内嵌浏览器的js方法就行（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://www.springframework.org/tags" %>
 <%
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
 %>








 测试支付





         微信js支付测试

  

          

          

          

            

  
•                 
• 测试支付信息
  
•             

  

            立即支付

  

        

  

    

  

  

      

      

      

       

    var appId = urlparameter("appId");  

    var timeStamp = urlparameter("timeStamp");  

    var nonceStr = urlparameter("nonceStr");  

    var pg = urlparameter("pg");  

    var signType = urlparameter("signType");  

    var paySign = urlparameter("paySign");  

      

      

      function onBridgeReady(){  

           

           WeixinJSBridge.invoke(  

               'getBrandWCPayRequest', {  

                   "appId" : appId,     //公众号名称，由商户传入       

                   "timeStamp": timeStamp,         //时间戳，自1970年以来的秒数       

                   "nonceStr" : nonceStr, //随机串       

                   "package" : "prepay_id=" + pg,       

                   "signType" : signType,         //微信签名方式:       

                   "paySign" : paySign    //微信签名   

               },  

                 

               function(res){       

                   if(res.err_msg == "get_brand_wcpay_request:ok" ) {  

                         

                       alert("支付成功");  

                   }     // 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回    ok，但并不保证它绝对可靠。   

               }  

           );   

        }  

        

        

        function pay(){  

              

            if (typeof WeixinJSBridge == "undefined"){  

               if( document.addEventListener ){  

                   document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);  

               }else if (document.attachEvent){  

                   document.attachEvent('WeixinJSBridgeReady', onBridgeReady);   

                   document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);  

               }  

            }else{  

               onBridgeReady();  

            }   

              

        }  

      

  

  

效果如下

转载于:http://blog.csdn.net/u014351782/article/details/52186932