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 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 {
// 获取openid
String openId = SessionUtilgetAtt(request, "openId");
if (openId == null) {
openId = getUserOpenId(request);
}
String appid = "wx16691fcb0523c1a4";
String paternerKey = "ININGFENG1234567fdfwfdfd1ss234567";
String out_trade_no = getTradeNo();
Map paraMap = new HashMap();
paraMapput("appid", appid);
paraMapput("attach", "测试");
paraMapput("body", "测试购买支付");
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);
// 统一下单 https://apimchweixinqqcom/pay/unifiedorder
String url = "https://apimchweixinqqcom/pay/unifiedorder";
String xml = ArrayToXml(paraMap);
String xmlStr = HttpKitpost(url, xml);
// 预付商品id
String prepay_id = "";
if (xmlStrindexOf("SUCCESS") != -1) {
Map map = doXMLParse(xmlStr);
prepay_id = (String) mapget("prepay_id");
}
Map payMap = new HashMap();
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()));
}
public String ArrayToXml(Map arr) {
String xml = "";
Iterator> iter = arrentrySet()iterator();
while (iterhasNext()) {
Entry entry = iternext();
String key = entrygetKey();
String val = entrygetValue();
xml += "<" + key + ">" + val + "";
}
xml += " ";
return xml;
}
// 获取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 params, String paternerKey )
throws UnsupportedEncodingException {
String string1 = PaycreateSign(params, false);
String stringSignTemp = string1 + "&key=" + paternerKey;
String signValue = DigestUtilsmd5Hex(stringSignTemp)toUpperCase();
return signValue;
}
private Map doXMLParse(String xml)
throws XmlPullParserException, IOException {
InputStream inputStream = new ByteArrayInputStream(xmlgetBytes());
Map map = null;
XmlPullParser pullParser = XmlPullParserFactorynewInstance()
newPullParser();
pullParsersetInput(inputStream, "UTF-8"); // 为xml设置要解析的xml数据
int eventType = pullParsergetEventType();
while (eventType != XmlPullParserEND_document) {
switch (eventType) {
case XmlPullParserSTART_document:
map = new HashMap();
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://wwwspringframeworkorg/tags" %> <% String path = requestgetContextPath(); String basePath = requestgetScheme() + "://" + requestgetServerName() + ":" + requestgetServerPort() + path + "/"; %>测试支付 微信js支付测试
- 测试支付信息
立即支付
效果如下
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考高分网。
