微信公众号支付H5调用支付解析

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

 String xml = ArrayToXml(paraMap, false); 

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

 // 预付商品id
 String 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.weixin.qq.com/pay/unifiedorder
 String url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; 

 String xml = ArrayToXml(paraMap, false); 

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

 // 预付商品id
 String 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[20150324100405]]></time_end><total_fee>1</total_fee><trade_type><![CDATA[JSAPI]]></trade_type><transaction_id><![CDATA[1009530574201503240036299496]]></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xml
 String resXml = ArrayToXml(map, true);
 response.getWriter().write(resXml);
 } 

 @RequestMapping("/orderquery.do")
 public void orderquery(HttpServletRequest request, HttpServletResponse response, String transaction_id, String out_trade_no, String callback) throws Exception{ 

 String url = "https://api.mch.weixin.qq.com/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 ) {
 for (Entry<String, String> entry : parm.entrySet()) {
 strbuff.append("<").append(entry.getKey()).append(">");
 if (isAddCDATA) {
  strbuff.append(<![CDATA[).append(entry.getValue()).append(]]>);
 }else {
  strbuff.append(entry.getValue());
 }
 strbuff.append("<").append(entry.getKey()).append(">");
 }
 }
 return strbuff.append(</xml>).toString();
 } 

 // 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<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 2015-10-9 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.weixin.qq.com/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 (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、issubscribe
 String 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>() {
 @Override
 public int compare(String o1, String o2) {
 return o1.compareTo(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 block
 e.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.weixin.qq.com/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="http://www.springframework.org/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" "http://www.w3.org/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="http://www.springframework.org/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" "http://www.w3.org/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 = "http://www.xxx.com/wxpay/page";
var urlhost = "http://www.xxx.com/"; 

$(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;
 else
 return 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;
 else
 return false;
 return true;
 }; 

function getFileUrl(sourceId) {
 var url = "";
 if (navigator.userAgent.indexOf("MSIE")>=1) { // IE
 url = document.getElementById(sourceId).value;
 } else if(navigator.userAgent.indexOf("Firefox")>0) { // Firefox
 url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));
 } else if(navigator.userAgent.indexOf("Chrome")>0) { // Chrome
 url = 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M
var 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") ==> 2006-07-02 08:09:04.423
//(new Date()).Format("yyyy-M-d h:m:s.S") ==> 2006-7-2 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.weixin.qq.com/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url
function wecharauto2baseurl(url) {
 return wecharauto2burl(urlpre+url);
} 

//页面授权针对snsapi_userinfo方式授权的url
function wecharauto2userinfourl(url) {
 return "https://open.weixin.qq.com/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link
 dataUrl: '', // 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QQ
 wx.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，尽请关注。

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