微信公众号支付

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 /shop/pay/

那此处配置/shop/pay/

二、开发流程

借用微信公众号支付api(地址 http://pay./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./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./wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html）

在微信中发送如下链接

https://open./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 后台支付

代码如下，包含预处理订单，支付订单等接口。

package org.andy.controller;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.ServletInputStream;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import mons.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.gson.util.Tools;import org.andy.util.DatetimeUtil;import org.andy.util.JsonUtil;import org.andy.util.SessionUtil;import org.andy.util.WebUtil;@Controller@RequestMapping("/pay")public class WXPayController {@RequestMapping(value = "wxprepay")public void jspay(HttpServletRequest request, HttpServletResponse response, String callback) throws Exception {// 获取openidString openId = SessionUtil.getAtt(request, "openId");if (openId == null) {openId = getUserOpenId(request);}String appid = "wx16691fcb0523c1a4";String partnerid = "22223670";String paternerKey = "fjfjfjfjf1234567FFFFFFFFF1234567";String out_trade_no = getTradeNo();Map<String, String> paraMap = new HashMap<String, String>();paraMap.put("appid", appid);paraMap.put("attach", "测试支付");paraMap.put("body", "测试购买Beacon支付");paraMap.put("mch_id", partnerid);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/wxpay/pay/appPay_notify.shtml");String sign = getSign(paraMap, paternerKey);paraMap.put("sign", sign);// 统一下单 https://api.mch./pay/unifiedorderString url = "https://api.mch./pay/unifiedorder";String xml = ArrayToXml(paraMap, false);String xmlStr = HttpKit.post(url, xml);// 预付商品idString prepay_id = "";if (xmlStr.indexOf("SUCCESS") != -1) {Map<String, String> map = doXMLParse(xmlStr);prepay_id = (String) map.get("prepay_id");}Map<String, String> payMap = new HashMap<String, String>();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()));}@RequestMapping(value = "appPay")public void appPay(HttpServletRequest request, HttpServletResponse response, String body, String detail,String total_fee, String spbill_create_ip, String notify_url, String trade_type, String callback)throws Exception {String appid = "wx16691fcb0523c1a4";String partnerid = "22223670";String paternerKey = "fjfjfjfjf1234567FFFFFFFFF1234567";String out_trade_no = getTradeNo();Map<String, String> paraMap = new HashMap<String, String>();paraMap.put("appid", appid);paraMap.put("body", body);paraMap.put("mch_id", partnerid);paraMap.put("nonce_str", create_nonce_str());paraMap.put("out_trade_no", out_trade_no);paraMap.put("spbill_create_ip", spbill_create_ip);paraMap.put("total_fee", total_fee);paraMap.put("trade_type", trade_type);paraMap.put("notify_url", notify_url);String sign = getSign(paraMap, paternerKey);paraMap.put("sign", sign);// 统一下单 https://api.mch./pay/unifiedorderString url = "https://api.mch./pay/unifiedorder";String xml = ArrayToXml(paraMap, false);String xmlStr = HttpKit.post(url, xml);// 预付商品idString prepay_id = "";Map<String, String> map = doXMLParse(xmlStr);if (xmlStr.indexOf("SUCCESS") != -1) {prepay_id = (String) map.get("prepay_id");}String result_code = map.get("result_code");String err_code_des = map.get("err_code_des");Map<String, String> payMap = new HashMap<String, String>();payMap.put("appid", appid);payMap.put("partnerid", partnerid);payMap.put("prepayid", prepay_id);payMap.put("package", "Sign=WXPay");payMap.put("noncestr", create_nonce_str());payMap.put("timestamp", create_timestamp());String paySign = getSign(payMap, paternerKey);payMap.put("sign", paySign);payMap.put("result_code", result_code);payMap.put("err_code_des", err_code_des);WebUtil.response(response, WebUtil.packJsonp(callback,JsonUtil.warpJsonNodeResponse(JsonUtil.objectToJsonNode(payMap)).toString()));}@RequestMapping("/appPay_notify")public void appPayNotify(HttpServletRequest request, HttpServletResponse response) throws Exception {// String xml =// "<xml><appid><![CDATA[wxb4dc385f953b356e]]></appid><bank_type><![CDATA[CCB_CREDIT]]></bank_type><cash_fee><![CDATA[1]]></cash_fee><fee_type><![CDATA[CNY]]></fee_type><is_subscribe><![CDATA[Y]]></is_subscribe><mch_id><![CDATA[1228442802]]></mch_id><nonce_str><![CDATA[1002477130]]></nonce_str><openid><![CDATA[o-HREuJzRr3moMvv990VdfnQ8x4k]]></openid><out_trade_no><![CDATA[1000000000051249]]></out_trade_no><result_code><![CDATA[SUCCESS]]></result_code><return_code><![CDATA[SUCCESS]]></return_code><sign><![CDATA[1269E03E43F2B8C388A414EDAE185CEE]]></sign><time_end><![CDATA[0324100405]]></time_end><total_fee>1</total_fee><trade_type><![CDATA[JSAPI]]></trade_type><transaction_id><![CDATA[100953057403240036299496]]></transaction_id></xml>";response.setCharacterEncoding("UTF-8");response.setContentType("text/xml");ServletInputStream in = request.getInputStream();String xmlMsg = Tools.inputStream2String(in);Map<String, String> map = doXMLParse(xmlMsg);String return_code = map.get("return_code");String return_msg = map.get("return_msg");map = new HashMap<String, String>();map.put("return_code", return_code);map.put("return_msg", return_msg);// 响应xmlString resXml = ArrayToXml(map, true);response.getWriter().write(resXml);}@RequestMapping("/orderquery")public void orderquery(HttpServletRequest request, HttpServletResponse response, String transaction_id,String out_trade_no, String callback) throws Exception {String url = "https://api.mch./pay/orderquery";String appid = "wx16691fcb0523c1a4";String partnerid = "22223670";String paternerKey = "fjfjfjfjf1234567FFFFFFFFF1234567";Map<String, String> map = new HashMap<String, String>();map.put("appid", appid);map.put("mch_id", partnerid);if (transaction_id != null && !transaction_id.equals("")) {map.put("transaction_id", transaction_id);} else {map.put("out_trade_no", out_trade_no);}map.put("nonce_str", create_nonce_str());String paySign = getSign(map, paternerKey);map.put("sign", paySign);String xml = ArrayToXml(map, false);String xmlStr = HttpKit.post(url, xml);Map<String, String> orderMap = doXMLParse(xmlStr);WebUtil.response(response, WebUtil.packJsonp(callback,JsonUtil.warpJsonNodeResponse(JsonUtil.objectToJsonNode(orderMap)).toString()));}/*** map转成xml* * @param arr* @return*/public String ArrayToXml(Map<String, String> parm, boolean isAddCDATA) {StringBuffer strbuff = new StringBuffer("<xml>");if (parm != null && !parm.isEmpty()) {for (Entry<String, String> entry : parm.entrySet()) {strbuff.append("<").append(entry.getKey()).append(">");if (isAddCDATA) {strbuff.append("<![CDATA[");if (StringUtil.isNotEmpty(entry.getValue())) {strbuff.append(entry.getValue());}strbuff.append("]]>");} else {if (StringUtil.isNotEmpty(entry.getValue())) {strbuff.append(entry.getValue());}}strbuff.append("</").append(entry.getKey()).append(">");}}return strbuff.append("</xml>").toString();}// 获取openIdprivate 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<String, String> 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<String, String> doXMLParse(String xml) throws XmlPullParserException, IOException {InputStream inputStream = new ByteArrayInputStream(xml.getBytes());Map<String, String> 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<String, String>();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;}}

wxprepay.shtm接口是预处理订单接口向微信服务器下订单。

appPay.shtml接口是支付接口。

appPay_notify.shtml接口是微信支付后异步通知结果接口。

orderquery.shtml接口是订单查询接口

3.3、涉及到的工具类

SessionUtil.java工具类

package org.andy.util;import javax.servlet.http.HttpServletRequest;public class SessionUtil {public static void addAtt(HttpServletRequest request, String key, Object value){request.getSession().setAttribute(key, value);}public static void removeAtt(HttpServletRequest request, String key){request.getSession().removeAttribute(key);}public static String getAtt(HttpServletRequest request, String key){return (String)request.getSession().getAttribute(key);}public static Object getAttObj(HttpServletRequest request, String key){return request.getSession().getAttribute(key);}public static String optAtt(HttpServletRequest request, String key, String value){String r = (String)request.getSession().getAttribute(key);if (r == null){r = value;}return r;}}

HttpKit 网络请求工具类

/*** https 请求 微信为https的请求** @author andy* @date -10-9 下午2:40:19*/ public class HttpKit {private static final String DEFAULT_CHARSET = "UTF-8";/*** @return 返回类型:* @throws IOException* @throws UnsupportedEncodingException* @throws NoSuchProviderException* @throws NoSuchAlgorithmException* @throws KeyManagementException* @description 功能描述: get 请求*/public static String get(String url, Map<String, String> params, Map<String, String> headers) throws IOException, ExecutionException, InterruptedException {AsyncHttpClient http = new AsyncHttpClient();AsyncHttpClient.BoundRequestBuilder builder = http.prepareGet(url);builder.setBodyEncoding(DEFAULT_CHARSET);if (params != null && !params.isEmpty()) {Set<String> keys = params.keySet();for (String key : keys) {builder.addQueryParameter(key, params.get(key));}}if (headers != null && !headers.isEmpty()) {Set<String> keys = headers.keySet();for (String key : keys) {builder.addHeader(key, params.get(key));}}Future<Response> f = builder.execute();String body = f.get().getResponseBody(DEFAULT_CHARSET);http.close();return body;}/*** @return 返回类型:* @throws IOException* @throws UnsupportedEncodingException* @throws NoSuchProviderException* @throws NoSuchAlgorithmException* @throws KeyManagementException* @description 功能描述: get 请求*/public static String get(String url) throws KeyManagementException, NoSuchAlgorithmException, NoSuchProviderException, UnsupportedEncodingException, IOException, ExecutionException, InterruptedException {return get(url, null);}/*** @return 返回类型:* @throws IOException* @throws NoSuchProviderException* @throws NoSuchAlgorithmException* @throws KeyManagementException* @throws UnsupportedEncodingException* @description 功能描述: get 请求*/public static String get(String url, Map<String, String> params) throws KeyManagementException, NoSuchAlgorithmException, NoSuchProviderException, UnsupportedEncodingException, IOException, ExecutionException, InterruptedException {return get(url, params, null);}/*** @return 返回类型:* @throws IOException* @throws NoSuchProviderException* @throws NoSuchAlgorithmException* @throws KeyManagementException* @description 功能描述: POST 请求*/public static String post(String url, Map<String, String> params) throws IOException, ExecutionException, InterruptedException {AsyncHttpClient http = new AsyncHttpClient();AsyncHttpClient.BoundRequestBuilder builder = http.preparePost(url);builder.setBodyEncoding(DEFAULT_CHARSET);if (params != null && !params.isEmpty()) {Set<String> keys = params.keySet();for (String key : keys) {builder.addParameter(key, params.get(key));}}Future<Response> f = builder.execute();String body = f.get().getResponseBody(DEFAULT_CHARSET);http.close();return body;}public static String post(String url, String s) throws IOException, ExecutionException, InterruptedException {AsyncHttpClient http = new AsyncHttpClient();AsyncHttpClient.BoundRequestBuilder builder = http.preparePost(url);builder.setBodyEncoding(DEFAULT_CHARSET);builder.setBody(s);Future<Response> f = builder.execute();String body = f.get().getResponseBody(DEFAULT_CHARSET);http.close();return body;}}

支付工具类pay.java

/*** 支付相关方法* @author andy**/public class Pay {// 发货通知接口private static final String DELIVERNOTIFY_URL = "https://api./pay/delivernotify?access_token=";/*** 参与 paySign 签名的字段包括：appid、timestamp、noncestr、package 以及 appkey。* 这里 signType 并不参与签名微信的Package参数* @param params* @return* @throws UnsupportedEncodingException */public static String getPackage(Map<String, String> params) throws UnsupportedEncodingException {String partnerKey = ConfKit.get("partnerKey");String partnerId = ConfKit.get("partnerId");String notifyUrl = ConfKit.get("notify_url");// 公共参数params.put("bank_type", "WX");params.put("attach", "yongle");params.put("partner", partnerId);params.put("notify_url", notifyUrl);params.put("input_charset", "UTF-8");return packageSign(params, partnerKey);}/*** 构造签名* @param params* @param encode* @return* @throws UnsupportedEncodingException */public static String createSign(Map<String, String> params, boolean encode) throws UnsupportedEncodingException {Set<String> keysSet = params.keySet();Object[] keys = keysSet.toArray();Arrays.sort(keys);StringBuffer temp = new StringBuffer();boolean first = true;for (Object key : keys) {if (key == null || StringUtil.isEmpty(params.get(key))) // 参数为空参与签名continue;if (first) {first = false;} else {temp.append("&");}temp.append(key).append("=");Object value = params.get(key);String valueString = "";if (null != value) {valueString = value.toString();}if (encode) {temp.append(URLEncoder.encode(valueString, "UTF-8"));} else {temp.append(valueString);}}return temp.toString();}/*** @param params* @param paternerKey* @return* @throws UnsupportedEncodingException */private static String packageSign(Map<String, String> params, String paternerKey) throws UnsupportedEncodingException {String string1 = createSign(params, false);String stringSignTemp = string1 + "&key=" + paternerKey;String signValue = DigestUtils.md5Hex(stringSignTemp).toUpperCase();String string2 = createSign(params, true);return string2 + "&sign=" + signValue;}/*** 支付签名* @param timestamp* @param noncestr* @param packages* @return* @throws UnsupportedEncodingException */public static String paySign(String timestamp, String noncestr,String packages) throws UnsupportedEncodingException {Map<String, String> paras = new HashMap<String, String>();paras.put("appid", ConfKit.get("AppId"));paras.put("timestamp", timestamp);paras.put("noncestr", noncestr);paras.put("package", packages);paras.put("appkey", ConfKit.get("paySignKey"));// appid、timestamp、noncestr、package 以及 appkey。String string1 = createSign(paras, false);String paySign = DigestUtils.shaHex(string1);return paySign;}/*** 支付回调校验签名* @param timestamp* @param noncestr* @param openid* @param issubscribe* @param appsignature* @return* @throws UnsupportedEncodingException */public static boolean verifySign(long timestamp,String noncestr, String openid, int issubscribe, String appsignature) throws UnsupportedEncodingException {Map<String, String> paras = new HashMap<String, String>();paras.put("appid", ConfKit.get("AppId"));paras.put("appkey", ConfKit.get("paySignKey"));paras.put("timestamp", String.valueOf(timestamp));paras.put("noncestr", noncestr);paras.put("openid", openid);paras.put("issubscribe", String.valueOf(issubscribe));// appid、appkey、productid、timestamp、noncestr、openid、issubscribeString string1 = createSign(paras, false);String paySign = DigestUtils.shaHex(string1);return paySign.equalsIgnoreCase(appsignature);}/*** 发货通知签名* @param paras* @return* @throws UnsupportedEncodingException* * @参数 appid、appkey、openid、transid、out_trade_no、deliver_timestamp、deliver_status、deliver_msg；*/private static String deliverSign(Map<String, String> paras) throws UnsupportedEncodingException {paras.put("appkey", ConfKit.get("paySignKey"));String string1 = createSign(paras, false);String paySign = DigestUtils.shaHex(string1);return paySign;}/*** 发货通知* @param access_token* @param openid* @param transid* @param out_trade_no* @return* @throws IOException * @throws NoSuchProviderException * @throws NoSuchAlgorithmException * @throws KeyManagementException * @throws InterruptedException * @throws ExecutionException */public static boolean delivernotify(String access_token, String openid, String transid, String out_trade_no) throws IOException, ExecutionException, InterruptedException {Map<String, String> paras = new HashMap<String, String>();paras.put("appid", ConfKit.get("AppId"));paras.put("openid", openid);paras.put("transid", transid);paras.put("out_trade_no", out_trade_no);paras.put("deliver_timestamp", (System.currentTimeMillis() / 1000) + "");paras.put("deliver_status", "1");paras.put("deliver_msg", "ok");// 签名String app_signature = deliverSign(paras);paras.put("app_signature", app_signature);paras.put("sign_method", "sha1");String json = HttpKit.post(DELIVERNOTIFY_URL.concat(access_token), JSONObject.toJSONString(paras));if (StringUtils.isNotBlank(json)) {JSONObject object = JSONObject.parseObject(json);if (object.containsKey("errcode")) {int errcode = object.getIntValue("errcode");return errcode == 0;}}return false;}}

流转化Tools.java工具类

public final class Tools {public static final String inputStream2String(InputStream in) throws UnsupportedEncodingException, IOException{if(in == null)return "";StringBuffer out = new StringBuffer();byte[] b = new byte[4096];for (int n; (n = in.read(b)) != -1;) {out.append(new String(b, 0, n, "UTF-8"));}return out.toString();}public static final boolean checkSignature(String token,String signature,String timestamp,String nonce){List<String> params = new ArrayList<String>();params.add(token);params.add(timestamp);params.add(nonce);Collections.sort(params,new Comparator<String>() {@Overridepublic int compare(String o1, String o2) {return pareTo(o2);}});String temp = params.get(0)+params.get(1)+params.get(2);return SHA1.encode(temp).equals(signature);}}

相应前端数据工具WebUtil.java工具类

public class WebUtil {public static Object getSessionAttribute(HttpServletRequest req, String key) {Object ret = null;try {ret = req.getSession(false).getAttribute(key);} catch (Exception e) {}return ret;}public static void response(HttpServletResponse response, String result) {try {response.setContentType("application/json;charset=utf-8");response.getWriter().write(result);} catch (IOException e) {e.printStackTrace();}}public static void response(HttpServletResponse response, ResponseMessage result) {try {response.setContentType("application/json;charset=utf-8");response.getWriter().write(JsonUtil.objectToJsonNode(result).toString()); } catch (Exception e) {e.printStackTrace();} }public static String packJsonp(String callback, String json) {if (json == null) {json = "";}if (callback == null || callback.isEmpty()) {return json;}return callback + "&&" + callback + '(' + json + ')';}public static String packJsonp(String callback, ResponseMessage response) {String json = null;if (response == null) {json = "";} else {json = JsonUtil.objectToJsonNode(response).toString();}if (callback == null || callback.isEmpty()) {return json;}return callback + "&&" + callback + '(' + json + ')';}}

Json转换工具JsonUtil.java

public class JsonUtil {public static ObjectNode warpJsonNodeResponse(JsonNode obj){ObjectNode objectNode=createObjectNode();objectNode.put("code", 1);objectNode.put("response", obj);return objectNode;}public static JsonNode objectToJsonNode(Object obj){try {ObjectMapper objectMapper = new ObjectMapper();String objJson=objectMapper.writeValueAsString(obj);JsonNode jsonNode = objectMapper.readTree(objJson);return jsonNode;} catch (JsonProcessingException e) {e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}}

四、微信H5调起支付

这个url需要后台实现，其实现功能如下：

1、接受微信服务器端发送的支付结果。

2、向微信服务器发送支付结果

具体 参考微信aip(http://pay./wiki/doc/api/index.php?chapter=9_7)

具体代码如下：

4.1、授权向后台发起生成统一下订单页面

wxrepay.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="spring" uri="/tags" %><%String path = request.getContextPath();String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";long t = System.currentTimeMillis();%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "/TR/html4/loose.dtd"><html><head><meta charset="utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, 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>微信公众号支付</title><link href="../css/css.css?t=<%=t%>" rel="stylesheet" type="text/css"></head><body><div class="index_box"><div class="apply_name">商品</div><div class="branch_con"><ul><li><span class="name">beacon 1分钱 1只</span></li><li><span class="name">测试支付信息</span></li></ul><p class="cz_btn"><a href="javascript:reppay();" class="btn_1">确定购买</a></p></div></div><script type="text/javascript" src="../js/common.js?t=<%=t%>"></script><script type="text/javascript" >var code = urlparameter("code");function reppay(){ajaxUtil({}, mainpath+"/pay/wxprepay.shtml?code=" + code, repay);}function repay(response){var info = response;var url = "wxpay?appId=" + info.appId + "&timeStamp=" +info.timeStamp + "&nonceStr=" + info.nonceStr +"&pg=" +info.pg + "&signType=" +info.signType + "&paySign=" +info.paySign;window.location.href= url + "&showwxpaytitle=1"; }</script></body></html>

首先是请求服务端wxprepay.shml接口，后台向微信支付平台获取支付订单信息，返回前台，wxpay.jsp页面

4.2、确认支付页面

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="spring" uri="/tags" %><%String path = request.getContextPath();String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";long t = System.currentTimeMillis();%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "/TR/html4/loose.dtd"><html><head><meta charset="utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, 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>微信公众号支付</title><link href="../css/css.css?t=<%=t%>" rel="stylesheet" type="text/css"></head><body><div class="index_box"><div class="apply_name">微信js支付测试</div><div class="branch_con"><ul><li><span class="name">测试支付信息</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/common.js?t=<%=t%>"></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(){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();} }</script></body></html>

4.2、前台涉及到的工具类

javascript工具类common.js，样式css.css就不贴了没意义。

var path="wxpay";var mainpath = "/wxpay";var appid = "wx16691fcb0523c1a4";var urlpre = "/wxpay/page";var urlhost = "/";$(document).ready(function(){$(".refresher").click(function(){refresh();});$("#goback").click(function(){goback();});});function popupMsg(msg){alert(msg);}function printUtilViaGet(panel, requestdata, ajaxurl, printfunction){$.ajax({type: 'GET',url: ajaxurl,data: requestdata,cache:false,dataType:"json",async: false,success: function(response) {if (response.code){if (panel != null && panel.length > 0){$(panel).html("");if (printfunction != null)$(panel).html(printfunction(response.response));}return true;} else {//alert(response.reason);}},error: function(x, e) {//alert("error", x);},complete: function(x) {//alert("call complete");}});return false;}function ajaxUtilViaGet(requestdata, ajaxurl, succFunction, failFunction){$.ajax({url: ajaxurl,type: "GET",dataType: "json",cache:false,data: requestdata,async: false,success: function(response) {if (response.code){if (succFunction != null)succFunction(response.response);} else {if (failFunction != null)failFunction(response.response);}},error: function(x, e) {//alert("error", x);},complete: function(x) {}});return false;}function printUtil(panel, requestdata, ajaxurl, printfunction, ajaxasync) {if (isEmpty(ajaxasync)) {ajaxasync = false;}$.ajax({type : 'POST',url : ajaxurl,data : requestdata,cache : false,dataType : "json",async : ajaxasync,success : function(response) {if (response.code) {if (panel != null && panel.length > 0) {$(panel).html("");if (printfunction != null)$(panel).html(printfunction(response.response));}return true;} else {// alert(response.reason);}},error : function(x, e) {// alert("error", x);},complete : function(x) {// alert("call complete");}});return false;}function appendUtil(panel, requestdata, ajaxurl, printfunction, ajaxasync) {if (isEmpty(ajaxasync)) {ajaxasync = false;}$.ajax({type : 'POST',url : ajaxurl,data : requestdata,cache : false,dataType : "json",async : ajaxasync,success : function(response) {if (response.code) {if (panel != null && panel.length > 0) {if (printfunction != null)$(panel).append(printfunction(response.response));}return true;} else {// alert(response.reason);}},error : function(x, e) {// alert("error", x);},complete : function(x) {// alert("call complete");}});return false;}function ajaxUtilAsync(requestdata, ajaxurl, succFunction, failFunction) {$.ajax({url : ajaxurl,type : "POST",dataType : "json",cache : false,data : requestdata,async : true,success : function(response) {if (typeof response.code == "number") {if (response.code > 0) {if (succFunction != null)succFunction(response.response);} else {if (failFunction != null)failFunction(response.response);}} else {if (response.result) {if (succFunction != null)succFunction(response.response);} else {if (failFunction != null)failFunction(response.response);}}},error : function(x, e) {// alert("error", x);},complete : function(x) {}});return false;}function ajaxUtil(requestdata, ajaxurl, succFunction, failFunction){$.ajax({url: ajaxurl,type: "POST",dataType: "json",cache:false,data: requestdata,async: false,success: function(response) {if (typeof response.code == "number"){if (response.code > 0){if (succFunction != null)succFunction(response.response);} else {if (failFunction != null)failFunction(response.response);}} else {if (response.result){if (succFunction != null)succFunction(response.response);} else {if (failFunction != null)failFunction(response.response);}}},error: function(x, e) {//alert("error", x);},complete: function(x) {}});return false;}function loadSelection(panel, requestdata, ajaxurl, itemName){ajaxUtil(requestdata, ajaxurl, function(response){var list = response.list;for (var i = 0;i<list.length;i++){$(panel).append("<option value='"+list[i][itemName]+"'>"+list[i][itemName]+"</option>");}}, null);}function ajaxSubmitRefresh(formId) {var hideForm = $(formId);var options = {dataType : "json",beforeSubmit : function() {},success : function(result) {if (result.result){showMsg("提交成功");} else {alert("提交失败！");}},error : function(result) {alert("提交失败！");}};hideForm.ajaxSubmit(options);}function ajaxSubmitWithJump(formId, nextPage) {var hideForm = $(formId);var options = {dataType : "json",beforeSubmit : function() {},success : function(result) {if (result.result){alert("提交成功");window.location.href = nextPage;} else {alert("提交失败！");}},error : function(result) {alert("提交失败！");}};hideForm.ajaxSubmit(options);}function refresh(){window.location.href = window.location.href;}function goback(){history.go(-1);}function urlparameter(paras){var url = location.href;var paraString = url.substring(url.indexOf("?")+1,url.length).split("&");var paraObj = {};for (var i=0; j=paraString[i]; i++){paraObj[j.substring(0,j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=")+1,j.length);}var returnValue = paraObj[paras.toLowerCase()];if(typeof(returnValue)=="undefined"){return "";}else{return returnValue;}}String.prototype.endWith=function(str){if(str==null||str==""||this.length==0||str.length>this.length)return false;if(this.substring(this.length-str.length)==str)return true;elsereturn false;return true;};String.prototype.startWith=function(str){if(str==null||str==""||this.length==0||str.length>this.length)return false;if(this.substr(0,str.length)==str)return true;elsereturn false;return true;};function getFileUrl(sourceId) {var url = "";if (navigator.userAgent.indexOf("MSIE")>=1) { // IEurl = document.getElementById(sourceId).value;} else if(navigator.userAgent.indexOf("Firefox")>0) { // Firefoxurl = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));} else if(navigator.userAgent.indexOf("Chrome")>0) { // Chromeurl = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));}return url;}function preImg(sourceId, targetId) {var url = getFileUrl(sourceId);var imgPre = document.getElementById(targetId);imgPre.src = url;}function initWX(){$.ajax({url:mainpath+'/wechatjs.do',type:'POST',dataType:'json',async: false,data: {url:location.href.split('#')[0]},success:function(result){console.log(result);var data=result['response']['map'];if(result['code']==1){wx.config({debug: false,appId:data['appId'], timestamp:data['timestamp'], nonceStr:data['nonceStr'], signature:data['signature'],jsApiList: ['onMenuShareTimeline','onMenuShareAppMessage','getLocation', 'onMenuShareQQ', 'onMenuShareWeibo']});}else{alert("fail to get code");window.alert('fail');};}});}var EARTH_RADIUS = 6378137.0; //单位Mvar PI = Math.PI;function getRad(d){return d*PI/180.0;}function getGreatCircleDistance(lat1,lng1,lat2,lng2){var radLat1 = getRad(lat1);var radLat2 = getRad(lat2);var a = radLat1 - radLat2;var b = getRad(lng1) - getRad(lng2);var s = 2*Math.asin(Math.sqrt(Math.pow(Math.sin(a/2),2) + Math.cos(radLat1)*Math.cos(radLat2)*Math.pow(Math.sin(b/2),2)));s = s*EARTH_RADIUS;s = Math.round(s*10000)/10000.0;s = Math.round(s);return s;}//对Date的扩展，将 Date 转化为指定格式的String //月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符， //年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) //例子： //(new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> -07-02 08:09:04.423 //(new Date()).Format("yyyy-M-d h:m:s.S")==> -7-2 8:9:4.18 Date.prototype.format = function(fmt) { //author: meizz var o = { "M+" : this.getMonth()+1, //月份 "d+" : this.getDate(),//日 "h+" : this.getHours(), //小时 "m+" : this.getMinutes(), //分 "s+" : this.getSeconds(), //秒 "q+" : Math.floor((this.getMonth()+3)/3), //季度 "S" : this.getMilliseconds() //毫秒 }; if(/(y+)/.test(fmt)) fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); for(var k in o) if(new RegExp("("+ k +")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length))); return fmt; }; //判断为空function isEmpty(src){if(("undefined" == typeof src) || (src == null) || ($.trim(src) == "") ){return true;}return false;}//判断不为空function notEmpty(src){return !isEmpty(src);}//微信页面授权 snsapi_base方式function wecharauto2burl(url) {return "https://open./connect/oauth2/authorize?appid=" + appid+ "&redirect_uri=" + encodeURIComponent(url)+ "&response_type=code&scope=snsapi_base&state=xybank#wechat_redirect";}//页面授权针对snsapi_base方式授权的urlfunction wecharauto2baseurl(url) {return wecharauto2burl(urlpre+url);}//页面授权针对snsapi_userinfo方式授权的urlfunction wecharauto2userinfourl(url) {return "https://open./connect/oauth2/authorize?appid=" + appid+ "&redirect_uri=" + encodeURIComponent(urlpre+url)+ "&response_type=code&scope=snsapi_userinfo&state=xybank#wechat_redirect";}//微信分享 此方法需放在wx.ready中function shareWeChat(title, link, imgUrl, desc){wx.onMenuShareTimeline({title: title, // 分享标题link: link, // 分享链接imgUrl: imgUrl, // 分享图标success: function () { // 用户确认分享后执行的回调函数},cancel: function () { // 用户取消分享后执行的回调函数}});//分享给朋友wx.onMenuShareAppMessage({title: title, // 分享标题desc: desc, // 分享描述link: link, // 分享链接imgUrl: imgUrl, // 分享图标type: 'link', // 分享类型,music、video或link，不填默认为linkdataUrl: '', // 如果type是music或video，则要提供数据链接，默认为空success: function () { // 用户确认分享后执行的回调函数},cancel: function () { // 用户取消分享后执行的回调函数}});//分享到QQwx.onMenuShareQQ({title: title, // 分享标题desc: desc, // 分享描述link: link, // 分享链接imgUrl: imgUrl, // 分享图标success: function () { // 用户确认分享后执行的回调函数},cancel: function () { // 用户取消分享后执行的回调函数}});//分享到腾讯微博wx.onMenuShareWeibo({title: title, // 分享标题desc: desc, // 分享描述link: link, // 分享链接imgUrl: imgUrl, // 分享图标success: function () { // 用户确认分享后执行的回调函数},cancel: function () { // 用户取消分享后执行的回调函数}});}

五、支付结果

公众号调起效果如下：

支付成功后，微信服务器得到后台的Notify通知后，会发微信说明支付信息，支付凭证如下：

后续会全部更新微信app支付，微信支付退款，微信企业向个人付款，支付宝相关支付。而且会上传全部代码到csdn资源下载处。