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微信支付H5調(diào)用支付詳解（java版）

 更新時間：2016年12月05日 10:49:50   作者：夜-feng  
本篇文章主要介紹了微信支付H5調(diào)用支付詳解，小編覺得挺不錯的，現(xiàn)在就分享給大家，也給大家做個參考。一起跟隨小編過來看看吧。

最近項目需要微信支付，然后看了下微信公眾號支付，，雖然不難，但是細(xì)節(jié)還是需要注意的，用了大半天時間寫了個demo，并且完整的測試了一下支付流程，下面分享一下微信公眾號支付的經(jīng)驗。

一、配置公眾號微信支付 

需要我們配置微信公眾號支付地址和測試白名單。

比如：支付JS頁面的地址為 http://www.xxx.com/shop/pay/

那此處配置www.xxx.com/shop/pay/

二、開發(fā)流程

借用微信公眾號支付api(地址 http://pay.weixin.qq.com/wiki/doc/api/index.PHP?chapter=7_4)，我們需要開發(fā)的為紅色標(biāo)記出的。如下：

三、向微信服務(wù)器端下訂單

調(diào)用統(tǒng)一下單接口，這樣就能獲取微信支付的prepay_id（http://pay.weixin.qq.com/wiki/doc/api/index.php?chapter=9_1）。

在調(diào)用該接口前有幾個字段是H5支付必須填寫的openid

3.1 獲取openid

可以通過網(wǎng)頁授權(quán)形式（http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html）

在微信中發(fā)送如下鏈接
https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx520c15f417810387&redirect_uri=要跳轉(zhuǎn)的下訂單的url&response_type=code&scope=snsapi_base&state=123#wechat_redirect

3.2 下訂單獲取prepay_id

代碼如下，實際上是通過post發(fā)送一個xml 文件，獲取微信服務(wù)器端發(fā)送過來的prepay_id。

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 { 
    // 獲取openid 
    String openId = SessionUtilgetAtt(request, "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", "測試"); 
    paraMapput("body", "測試購買支付"); 
    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); 
 
    // 統(tǒng)一下單 https://apimchweixinqqcom/pay/unifiedorder 
    String url = "https://apimchweixinqqcom/pay/unifiedorder"; 
 
    String xml = ArrayToXml(paraMap); 
 
    String xmlStr = HttpKitpost(url, xml); 
 
    // 預(yù)付商品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(JsonUtilobjectToJsonNode(payMap))toString())); 
  } 
 
  /** 
   * map轉(zhuǎn)成xml 
   * 
   * @param arr 
   * @return 
   */ 
  public String ArrayToXml(Map<String, String> arr) { 
    String 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; 
  } 
 
  // 獲取openId 
  private String getUserOpenId(HttpServletRequest request) throws Exception { 
    String code = requestgetParameter("code"); 
    if (code == null) { 
      String openId = requestgetParameter("openId"); 
      return openId; 
    } 
    Oauth o = new Oauth(); 
    String token = ogetToken(code); 
    JsonNode node = JsonUtilStringToJsonNode(token); 
    String openId = nodeget("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 += 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_PATTERN); 
    return "HZNO" + timestamp; 
  } 
   
  private String getSign(Map<String, String> params, String paternerKey ) 
      throws UnsupportedEncodingException { 
    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 { 
 
    InputStream inputStream = new ByteArrayInputStream(xmlgetBytes()); 
 
    Map<String, String> map = null; 
 
    XmlPullParser pullParser = XmlPullParserFactorynewInstance() 
        newPullParser(); 
 
    pullParsersetInput(inputStream, "UTF-8"); // 為xml設(shè)置要解析的xml數(shù)據(jù) 
 
    int eventType = pullParsergetEventType(); 
 
    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; 
  } 
 
}

四、H5支付

H5支付其實很簡單，只需要調(diào)用微信內(nèi)嵌瀏覽器的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://wwwspringframeworkorg/tags" %> 
<% 
  String path = requestgetContextPath(); 
  String basePath = requestgetScheme() + "://" + requestgetServerName() + ":" + requestgetServerPort() + path + "/"; 
%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 01 Transitional//EN" "http://wwwworg/TR/html4/loosedtd"> 
<html> 
<head> 
<meta charset="utf-8" /> 
<meta name="viewport" content="width=device-width, initial-scale=0, maximum-scale=0, user-scalable=0" /> 
<meta name="apple-mobile-web-app-capable" content="yes" /> 
<meta name="apple-mobile-web-app-status-bar-style" content="black" /> 
<meta name="format-detection" content="telephone=no" /> 
<title>測試支付</title> 
<link href="/css/csscss?v=0" rel="stylesheet" type="text/css"> 
</head> 
 
<body> 
  <div class="index_box"> 
    <div class="apply_name">微信js支付測試</div> 
     
     
    <div class="branch_con"> 
      <ul> 
        <li><span class="name">測試支付信息</span></li> 
      </ul> 
      <p class="cz_btn"><a href="javascript:pay();" class="btn_1">立即支付</a></p> 
    </div> 
  </div> 
 
  <script type="text/javascript" src="/js/zeptominjs"></script> 
  <script type="text/javascript" src="/js/commonjs"></script> 
  <script type="text/javascript"> 
    
  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(){ 
      
      WeixinJSBridgeinvoke( 
        'getBrandWCPayRequest', { 
          "appId" : appId,   //公眾號名稱，由商戶傳入    
          "timeStamp": timeStamp,     //時間戳，自1970年以來的秒數(shù)    
          "nonceStr" : nonceStr, //隨機(jī)串    
          "package" : "prepay_id=" + pg,    
          "signType" : signType,     //微信簽名方式:    
          "paySign" : paySign  //微信簽名  
        }, 
         
        function(res){    
          if(reserr_msg == "get_brand_wcpay_request:ok" ) { 
             
            alert("支付成功"); 
          }   // 使用以上方式判斷前端返回,微信團(tuán)隊鄭重提示：reserr_msg將在用戶支付成功后返回  ok，但并不保證它絕對可靠。  
        } 
      );  
    } 
    
    
    function pay(){ 
       
      if (typeof WeixinJSBridge == "undefined"){ 
        if( documentaddEventListener ){ 
          documentaddEventListener('WeixinJSBridgeReady', onBridgeReady, false); 
        }else if (documentattachEvent){ 
          documentattachEvent('WeixinJSBridgeReady', onBridgeReady);  
          documentattachEvent('onWeixinJSBridgeReady', onBridgeReady); 
        } 
      }else{ 
        onBridgeReady(); 
      }  
       
    } 
  </script> 
</body> 
</html>

效果如下

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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