微信H5支付功能开发

本文介绍的是微信H5支付功能开发，也就是在微信之外的H5页面支付。

首先我们需要先看微信的官方文档https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_1，这里面几乎介绍了全部流程了。等你了解大概流程之后，需要在微信公众平台和微信商户平台拿到或者配置一下参数。

appid：公众平台的appid

商户号：公众平台的商户号

商户密钥：key设置路径：微信商户平台(pay.weixin.qq.com)-->账户设置-->API安全-->密钥设置

最后在商户平台后台产品中心-->开发配置 中添加H5支付回调域名，域名必须是通过备案的。（下图借用了某个兄弟的图，我懒得上后台截图了）

花了不少时间去填这些坑，填完了我们就可以吭哧吭哧开工搬砖了！

写完支付别忘了还有订单查询功能需要开发，主要为了查询出哪些王八蛋就只是来看看不买东西还占库存。不给钱的我们需要把库存要回来。

/**

* 保存订单并发起支付请求

* @param request

* @param response

* @throws IOException 

*/

@RequestMapping(value = "/save")

public void save(HttpServletRequest request, HttpServletResponse response) throws IOException{

//判断用户是否登录

String mobileNumber = (String)request.getSession().getAttribute("mobileNumber");

if(StringUtils.isEmpty(mobileNumber)){

return;

}

response.setContentType("text/xml;charset=utf-8");

PrintWriter out = response.getWriter();

ResponMsg msg = new ResponMsg();

msg.setSuccess(true);

String content = "提交成功";

try{

//获取用户选择的票务信息,邮寄信息

String ticketId = request.getParameter("ticketId");

String ticketCount = request.getParameter("ticketCount");

String userName = request.getParameter("userName");

String userAddress = request.getParameter("userAddress");

String userMobile = request.getParameter("userMobile");

 

//参数验证

if(StringUtils.isEmpty(ticketId) || StringUtils.isEmpty(ticketCount) || StringUtils.isEmpty(userAddress) 

|| StringUtils.isEmpty(userMobile) || StringUtils.isEmpty(userName)){

content = "请正确且完整填写收货信息！";

msg.setCode(-2);

return;

}

//判断是否有可售票 有则创建订单预留票并发起支付

ActTicket actTicket = showService.queryTicketById(Integer.valueOf(ticketId));

if(actTicket.getTicketStock() - Integer.valueOf(ticketCount) < 0){

content = "抱歉，已售完！感谢关注！";

msg.setCode(-1);

return;

}

//创建订单 

// 自己网站上的订单号

int randomNum  = (int) (Math.random() * 1999+5000);

//String out_trade_no = TimeUtils.getSysTime("yyyyMMddHHmmss") + randomNum;

String orderNO = TimeUtils.getSysTime("yyyyMMddHHmmss") + randomNum;

ActUserAddress actUserAddress = new ActUserAddress(mobileNumber, userName, userMobile,userAddress, orderNO);

ActOrder actOrder = new ActOrder();

actOrder.setOrderNumber(orderNO);

actOrder.setTicketId(actTicket.getId());

actOrder.setProductName(actTicket.getTicketLevel());

actOrder.setProductPrice(actTicket.getTicketPrice());

actOrder.setProductCount(Integer.valueOf(ticketCount));

actOrder.setTotalPay(actTicket.getTicketPrice() * Integer.valueOf(ticketCount));

actOrder.setPayType(1);

actOrder.setStatement(1);

actOrder.setUserAccount(mobileNumber);

actOrder.setActUserAddress(actUserAddress);

System.out.println(mobileNumber + " 创建订单：" +  actOrder.toString());

//缓存数据

request.getSession(true).setAttribute("actOrder", actOrder);

showService.createOrder(actOrder);

//发起支付 

content = "/show/wxPayH5";

msg.setCode(9);

}catch(Exception e){

msg.setCode(0);

msg.setSuccess(false);

msg.setMessage("当前人数过多，请稍后再来。");

e.printStackTrace();

}finally{

msg.setMessage(content);

out.print(JsonUtil.toJson(msg));

out.flush();

out.close();

}

}

 

 

 

/**

* 微信H5支付 

* 统一下单

* @param request

* @param response

* @param model

* @throws Exception

*/

@RequestMapping("/wxPayH5")

public void wxPayH5(HttpServletRequest request, HttpServletResponse response, ModelMap model) throws Exception {

//System.out.println("pay ===== start===");

//System.out.println("pay mobile=== " + request.getSession().getAttribute("mobileNumber").toString());

ActOrder actOrder = (ActOrder)request.getSession(true).getAttribute("actOrder");

System.out.println("===wxPayH5===start===actOrder===" + actOrder.toString());

request.getSession().removeAttribute("actOrder");

Map result = new HashMap();

result.put("success", false);

try {

// 付款金额，必填

String total_fee = String.valueOf(actOrder.getTotalPay());  //"0.01"

 

// 账号信息

String appid = PayConfig.APP_ID; // appid

String mch_id = PayConfig.MCH_ID; // 商业号

String key = PayConfig.API_KEY; // key

 

String currTime = PayCommonUtil.getCurrTime();

String strTime = currTime.substring(8, currTime.length());

String strRandom = PayCommonUtil.buildRandom(4) + "";

String nonce_str = strTime + strRandom;

// 价格 注意：价格的单位是分

String order_price = new BigDecimal(total_fee).multiply(new BigDecimal(100)).toString().split("\\.")[0];

// 自己网站上的订单号

String out_trade_no = actOrder.getOrderNumber();

// 获取发起电脑 ip

String spbill_create_ip = HttpUtil.getRealIp(request);

 

// 回调接口

String notify_url = "http://wx.xxx.com/xx/xx/payNotifyMe";

// 页面跳转同步通知页面路径

String trade_type = "MWEB";

 

// 设置package订单参数

SortedMap packageParams = new TreeMap();

packageParams.put("appid", appid);

packageParams.put("mch_id", mch_id);

// 生成签名的时候需要你自己设置随机字符串

packageParams.put("nonce_str", nonce_str);

packageParams.put("out_trade_no", out_trade_no);

packageParams.put("total_fee", order_price);

packageParams.put("spbill_create_ip", spbill_create_ip);

packageParams.put("notify_url", notify_url);

packageParams.put("trade_type", trade_type);

packageParams.put("body", PayConfig.BODY);

packageParams.put("scene_info", "{\"h5_info\": {\"type\":\"Wap\",\"wap_url\": \"http://wx.xxxx.com\",\"wap_name\": \"测试\"}}");

String sign = PayCommonUtil.createSign("UTF-8", packageParams, key);

System.out.println("订单号：" + out_trade_no + " 的签名：" + sign);

packageParams.put("sign", sign);

String requestXML = PayCommonUtil.getRequestXml(packageParams);

String resXml = HttpUtil.postData(PayConfig.UFDODER_URL, requestXML);

Map map = XMLUtil.doXMLParse(resXml);

//String urlCode = (String) map.get("code_url");

System.out.println("out_trade_no=" + map.get("out_trade_no"));

System.out.println("prepay_id=" + map.get("prepay_id"));

//确认支付过后跳的地址,需要经过urlencode处理

String urlString = URLEncoder.encode("http://wx.xxx.com/xx/xx/xx/list.html", "GBK");

String mweb_url = map.get("mweb_url")+"&redirect_url="+urlString;

 

//更新订单状态

actOrder.setPayOrderNO(map.get("prepay_id").toString());

actOrder.setStatement(2);

actOrder.setNote(map.get("sign").toString());

showService.updateOrderStatement(actOrder);

System.out.println("==========mweb_url==========" + mweb_url);

response.sendRedirect(mweb_url);

//result.put("sHtmlText", urlCode);

result.put("success", true);

} catch (Exception e) {

e.printStackTrace();

result.put("errormsg", e.getMessage());

}

}

 

 

/**

* 执行回调 确认支付后处理事件 例如添加金额到数据库等操作

* 

* @param request

* @param response

* @throws Exception

*/

@RequestMapping("/payNotifyMe")

public void weixin_notify(HttpServletRequest request, HttpServletResponse response, ModelMap model)throws Exception {

System.out.println("进入支付h5回调=====================");

String xmlMsg = readData(request);

System.out.println("pay notice---------"+xmlMsg);

Map params = XMLUtil.doXMLParse(xmlMsg);

try {

// 过滤空 设置 TreeMap

SortedMap packageParams = new TreeMap();

Iterator it = params.keySet().iterator();

while (it.hasNext()) {

String parameter = (String) it.next();

String parameterValue = params.get(parameter)+"";

String v = "";

if (null != parameterValue) {

v = parameterValue.trim();

}

//System.out.println( parameter + " value==============="+v);

packageParams.put(parameter, v);

}

//订单号

String orderNO = packageParams.get("out_trade_no").toString().trim();

ActOrder actOrder = new ActOrder();

actOrder.setOrderNumber(orderNO);

actOrder.setPayOrderNO(packageParams.get("sign").toString().trim());

actOrder.setPayOrderNO(packageParams.get("transaction_id").toString());

String resXml = "";

// 处理业务开始

if ("SUCCESS".equals((String) packageParams.get("result_code"))) {

// 这里是支付成功 

model.put("msg", "付款成功");

// 执行自己的业务逻辑   更新订单状态

actOrder.setStatement(3);

// 通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了.

resXml = "" + "" + "" + " ";

} else {

model.put("msg", "付款失败");

actOrder.setStatement(0);

resXml = "" + "" + "" + " ";

}

 

//更新订单

showService.updateOrderStatement(actOrder);

 

BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());

out.write(resXml.getBytes());

out.flush();

out.close();

} catch (Exception e) {

e.printStackTrace();

}

}

 

public static String readData(HttpServletRequest request) {

BufferedReader br = null;

try {

StringBuilder result = new StringBuilder();

br = request.getReader();

for (String line; (line=br.readLine())!=null;) {

if (result.length() > 0) {

result.append("\n");

}

result.append(line);

}

 

return result.toString();

} catch (IOException e) {

throw new RuntimeException(e);

}

finally {

if (br != null)

try {br.close();} catch (IOException e) {e.printStackTrace();}

}

}

需要完整的代码可以留言哦！可有偿指导开发完整个流程！