一个简单的微信小程序支付demo

// .wxml <button bindtap='payment'>支付 0.01</button> // .js //在这里演示支付的过程,获取openid不做解释 payment: function () { 
    var that = this; console.log('openid=' + app.globalData.openid); //请求后台发起支付，获取5个参数，data中放入支付的总额及其openid //请求为示例 wx.request({ 
    url: 'https://服务器域名//wx_pay', data: { 
    openid: app.globalData.openid, money: "0.01" }, // method: 'POST', // header: { "Content-Type": "application/json;charset=UTF-8"}, success: res => { 
    console.log("服务端返回订单号"); if (res ) { 
    //接受的5个参数，调用这个方法成功，微信就会弹出输入密码的界面 wx.requestPayment({ 
    timeStamp: res.data.data.timeStamp, nonceStr: res.data.data.nonceStr, package: res.data.data.package, signType: res.data.data.signType, paySign: res.data.data.paySign, success: payRes => { 
    //支付成功后，可以做一些逻辑判断 console.log('支付成功！'); console.dir(payRes); }, fail: payFail => { 
    console.log('支付失败！'); console.dir(payFail); } }) } else { 
    console.log('后台没有接受到5个参数'); } }, fail: fail => { 
    console.log('支付获取参数失败！'); console.dir(fail); } }) } @RequestMapping("wx_pay") public Result<?> generateSignature(@RequestParam String openid , @RequestParam String money) throws Exception { 
    Map<String, String> reqParams = new HashMap<>(); //微信分配的小程序ID reqParams.put("appid",APPID); //微信支付分配的商户号 reqParams.put("mch_id", MCH_ID); //随机字符串 reqParams.put("nonce_str", WXPayUtil.generateNonceStr()); //签名类型 reqParams.put("sign_type", "MD5"); //充值订单 商品描述 reqParams.put("body", "-测试-充值订单-微信小程序"); //商户订单号 reqParams.put("out_trade_no", WXPayUtil.createBillNo() ); //订单总金额，单位为分 reqParams.put("total_fee", WXPayUtil.getMoney(money) ); //终端IP reqParams.put("spbill_create_ip", "127.0.0.1"); //通知地址 reqParams.put("notify_url", NOTIFY_URL); //交易类型 reqParams.put("trade_type", "JSAPI"); //用户标识 、openid(在接口文档中 如果交易类型设置成'JSAPI'则必须传入openid) reqParams.put("openid", openid); //第一次签名 String sign = WXPayUtil.generateSignature(reqParams, MCHAPI_KEY); reqParams.put("sign", sign); /* * 调用支付定义下单API,返回预付单信息 prepay_id */ String xmlResult = HttpUtil.doSSLPost(WxProgramPayConfig.UNIFIED_ORDER_URL, WXPayUtil.mapToXml(reqParams)); //解析统一下单返回结果的xml Map<String, String> result = WXPayUtil.xmlToMap(xmlResult); //返回状态码 String return_code = (String) result.get("return_code"); String return_Msg = String.valueOf(result.get("return_msg")); //预付单信息 String prepay_id = result.get("prepay_id"); /* * 小程序调起支付数据签名 */ Map<String, String> packageParams = new HashMap<String, String>(); if(return_code == "SUCCESS" || return_code.equals("SUCCESS")){ 
    //返回的预付单信息 packageParams.put("appId",APPID); //这边要将返回的时间戳转化成字符串，不然小程序端调用wx.requestPayment方法会报签名错误 packageParams.put("timeStamp", String.valueOf(WXPayUtil.getCurrentTimestampMs())); packageParams.put("nonceStr", WXPayUtil.generateNonceStr()); packageParams.put("package", "prepay_id=" + prepay_id); packageParams.put("signType", "MD5"); //再次签名，这个签名用于小程序端调用wx.requesetPayment方法 String packageSign = WXPayUtil.generateSignature(packageParams, MCHAPI_KEY); packageParams.put("paySign", packageSign); logger.info("=======================第二次签名：" + packageSign + "====================="); return ResultGenerator.genSuccessResult(packageParams); }else{ 
    logger.info("支付返回状态码错误 ===>" + return_code); logger.info("支付返回状态码错误 ===>" + WXPayUtil.getMsg(return_code)); return ResultGenerator.genSuccessResult(return_code); } } / * 微信小程序支付成功回调函数 * @param request * @param response * @throws Exception */ @ApiIgnore @RequestMapping("/WeChatNotify") public void weChatNotify(HttpServletRequest request,HttpServletResponse response) throws Exception { 
    logger.info("【进入微信支付回调通知】"); BufferedReader br = new BufferedReader(new InputStreamReader((ServletInputStream)request.getInputStream())); String line = null; StringBuilder sb = new StringBuilder(); while((line = br.readLine())!=null){ 
    sb.append(line); } br.close(); // 解析xml成map Map<String, String> map = new HashMap<String, String>(); map = XMLUtil.doXMLParse(sb.toString()); String resXml = ""; System.out.println("接收到的报文：" + sb.toString()); // 过滤空 设置 TreeMap SortedMap<Object, Object> packageParams = new TreeMap<Object, Object>(); Iterator it = map.keySet().iterator(); while (it.hasNext()) { 
    String parameter = (String) it.next(); String parameterValue = map.get(parameter); String v = ""; if (null != parameterValue) { 
    v = parameterValue.trim(); } packageParams.put(parameter, v); } String returnCode = (String) map.get("return_code"); if("SUCCESS".equals(returnCode)){ 
    //验证签名是否正确 if (PayCommonUtil.isTenpaySign("UTF-8", packageParams, MCHAPI_KEY)) { 
    // 这里是支付成功 /此处添加自己的业务逻辑代码start/ // String mch_id = (String) packageParams.get("mch_id"); // String openid = (String) packageParams.get("openid"); String out_trade_no = (String) packageParams.get("out_trade_no"); //订单号 // String prepay_id = (String) packageParams.get("prepay_id"); Integer total_fee = Integer.parseInt((String)packageParams.get("total_fee")); String attach = (String)packageParams.get("attach"); //商家数据包，原样返回------扩展字段 // JSONObject json = JSON.parseObject(attach); // String notifyUrl = json.getString("notifyUrl"); //  /此处添加自己的业务逻辑代码end/ //通知微信服务器已经支付成功 resXml = " 
   
     " 
    + " 
   
     SUCCESS 
   " + " 
   
     OK 
   " + " "; } }else{ 
    resXml = " 
   
     " 
    + " 
   
     FAIL 
   " + " 
   
     报文为空 
   " + " "; } System.out.println(resXml); System.out.println("微信支付回调数据结束"); BufferedOutputStream out = new BufferedOutputStream( response.getOutputStream()); out.write(resXml.getBytes()); out.flush(); out.close(); }