最近做了一个小程序用到了微信支付及零钱提现功能。
准备工作，开发之前，我们需要有下面这些东西：
- appId
- 密钥(小程序配置界面)
- 商户号
- api密钥(商家后台自己设置)
1，小程序代码实现
<view class='pay_btn_view'> <button class='pay_btn' bindtap='btn_to_pay' data-keyword="{{hmhDataInfo}}">立即购买</button> </view>小程序js实现部分
btn_to_pay: function (e) { //显示加载数据 this.setData({ loadingHidden: false }); var paymoney = e.currentTarget.dataset.keyword.serviceprice; console.info(" === " + this.data.pay_state + " , money = " + paymoney); var content = ""; var type = 0; if (this.data.pay_state==0){ content = "你选择了月"; type = 1; } else if (this.data.pay_state==1){ content = "你选择了三个月"; type = 2; } else if (this.data.pay_state==2){ content = "你选择了年"; type = 3; } else if (this.data.pay_state == 3) { content = "你选择了终生"; type = 4; } var openid = wx.getStorageSync("openId"); if (openid != '') { //关闭授权层 this.setData({ isRuleTrue: false, }) } else { //显示弹出层 this.setData({ isRuleTrue: true }) } var that = this; wx.request({ url: getApp().data.servsers + '/dp/sys/wxpay/topay?price=' + paymoney + '&open_id=' + openid + '&type=' + type, method: "GET", header: { 'content-type': 'application/text' }, success: function (res) { that.setData({ loadingHidden: true }); var nonceStr = res.data.userInfoPay.nonceStr; var packages = res.data.userInfoPay.packages; var pay_price = res.data.userInfoPay.pay_price; var sign = res.data.userInfoPay.sign; var timeStamp = res.data.userInfoPay.timeStamp; //只有status 为 0 才可以正常支付 var status = res.data.userInfoPay.status; if(status==0){ wx.requestPayment({ 'timeStamp': timeStamp, 'nonceStr': nonceStr, 'package': packages, 'signType': 'MD5', 'paySign': sign, 'success': function (succ) { wx.showModal({ title: '提示', content: '支付成功', success: function (e) { if(e.confirm){ console.info(" success === "); //跳转到用户信息页面 setTimeout(function () { wx.switchTab({ url: '../myinfo/myinfo' }) }, 500) }else if(e.cancel){ console.info(" cancel === "); } },//接口调用成功 fail: function () { }, //接口调用失败的回调函数 complete: function () { } //接口调用结束的回调函数 }); }, 'fail': function (err) { wx.showModal({ title: '提示', content: '支付失败' }); }, 'complete': function (comp) { } }) }else{ wx.showModal({ title: '提示', content: '支付验证失败' }); } } }) },
2，后台接口实现
/**** * 小程序端支付接口 * oZvme4q2Oi7Dz3FChXc4G_3kqw28 * @return * @throws Exception */ @RequestMapping("/topay") public R wxUserPay(HttpServletRequest request, HttpServletResponse response, HttpSession httpSession) throws Exception { logger.info("wechat pay #####################################################"); String pay_price = request.getParameter("price"); String open_id = request.getParameter("open_id"); String type = request.getParameter("type"); String orderNo = Sha1Util.getOrderNumber(); Map<String, Object> resultInfo = new HashMap<String, Object>(); if(!"".equals(open_id)&&open_id!=null){ logger.info("wxUserPay >>>>> "+pay_price+" , open_id = "+open_id+ " , orderNo = "+orderNo); //先查询用户然后，生成订单保存到数据库（状态为待支付） HmhOrderInfoEntity orderInfoEntity = new HmhOrderInfoEntity(); orderInfoEntity.setCreateTime(DateUtils.format(new Date(),DateUtils.DATE_TIME_PATTERN)); orderInfoEntity.setOpenid(open_id); orderInfoEntity.setPayPrice(pay_price); orderInfoEntity.setStatus(0); //等待付款 orderInfoEntity.setOrderid(orderNo); orderInfoEntity.setOrderType(0); orderInfoEntity.setType(Integer.parseInt(type)); hmhOrderInfoService.saveHmhOrderInfo(orderInfoEntity); //金额转化为分为单位 float sessionmoney = Float.parseFloat(pay_price); String finalmoney = String.format("%.2f", sessionmoney); finalmoney = finalmoney.replace(".", ""); //商户相关资料 String appid = HmhConfig.APP_ID; String appsecret = HmhConfig.APP_secret; String partner = HmhConfig.pertenr; String partnerkey = HmhConfig.pertnerKey; String currTime = TenpayUtil.getCurrTime(); //8位日期 String strTime = currTime.substring(8, currTime.length()); //四位随机数 String strRandom = TenpayUtil.buildRandom(4) + ""; //10位序列号,可以自行调整。 String strReq = strTime + strRandom; //商户号 String mch_id = partner; //子商户号 非必输 //String sub_mch_id=""; //设备号 非必输 String device_info=""; //随机数 String nonce_str = strReq; //商品描述 //String body = describe; //商品描述根据情况修改 String body = "xxx管理服务费"; //附加数据 String attach = ""; //商户订单号 String out_trade_no = orderNo; int intMoney = Integer.parseInt(finalmoney); //总金额以分为单位，不带小数点 int total_fee = intMoney; //订单生成的机器 IP String spbill_create_ip = request.getRemoteAddr(); //订 单 生 成 时 间 非必输//String time_start =""; //订单失效时间 非必输//String time_expire = ""; //商品标记 非必输//String goods_tag = ""; //这里notify_url是 支付完成后微信发给该链接信息，可以判断会员是否支付成功，改变订单状态等。 String notify_url =wxpay_notify; String trade_type = "JSAPI"; //非必输 SortedMap<String, String> packageParams = new TreeMap<String, String>(); packageParams.put("appid", appid); packageParams.put("mch_id", mch_id); packageParams.put("nonce_str", nonce_str); packageParams.put("body", body); packageParams.put("attach", attach); packageParams.put("out_trade_no", out_trade_no); //这里写的金额为1 分到时修改 packageParams.put("total_fee", String.valueOf(total_fee)); packageParams.put("spbill_create_ip", spbill_create_ip); packageParams.put("notify_url", notify_url); packageParams.put("trade_type", trade_type); packageParams.put("openid", open_id); RequestHandler reqHandler = new RequestHandler(request, response); reqHandler.init(appid, appsecret, partnerkey); String sign = reqHandler.createSign(packageParams); String xml="<xml>"+ "<appid>"+appid+"</appid>"+ "<mch_id>"+mch_id+"</mch_id>"+ "<nonce_str>"+nonce_str+"</nonce_str>"+ "<sign>"+sign+"</sign>"+ "<body><![CDATA["+body+"]]></body>"+ "<attach>"+attach+"</attach>"+ "<out_trade_no>"+out_trade_no+"</out_trade_no>"+ //金额，这里写的1 分到时修改 "<total_fee>"+String.valueOf(total_fee)+"</total_fee>"+ "<spbill_create_ip>"+spbill_create_ip+"</spbill_create_ip>"+ "<notify_url>"+notify_url+"</notify_url>"+ "<trade_type>"+trade_type+"</trade_type>"+ "<openid>"+open_id+"</openid>"+ "</xml>"; String createOrderURL = HmhConfig.unifiedorder; String prepay_id=""; try { prepay_id = new GetWxOrderno().getPayNo(createOrderURL, xml); logger.info("prepay_id >>>>> "+prepay_id); if("".equals(prepay_id)){ resultInfo.put("status",3); resultInfo.put("msg","统一支付接口获取预支付订单出错"); } } catch (Exception e) { e.printStackTrace(); } SortedMap<String, String> finalpackage = new TreeMap<String, String>(); String appid2 = appid; String timestamp = Sha1Util.getTimeStamp(); String nonceStr2 = nonce_str; String prepay_id2 = "prepay_id="+prepay_id; String packages = prepay_id2; finalpackage.put("appId", appid2); finalpackage.put("timeStamp", timestamp); finalpackage.put("nonceStr", nonceStr2); finalpackage.put("package", packages); finalpackage.put("signType", "MD5"); String finalsign = reqHandler.createSign(finalpackage); Map<String, Object> map= new HashMap<String, Object>(); map.put("status", 0); map.put("appId", appid2); map.put("timeStamp", timestamp); map.put("nonceStr", nonceStr2); map.put("packages", packages); map.put("sign", finalsign); map.put("pay_price", pay_price); map.put("open_id", open_id); resultInfo.put("userInfoPay",map); resultInfo.put("status",0); resultInfo.put("msg","支付成功"); }else{ logger.info("用户open_id为空"); resultInfo.put("status",1); resultInfo.put("msg","用户open_id为空"); } return R.ok(1,resultInfo); }小程序提现接口java代码实现
//提现到零钱 //https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_2 @RequestMapping("/transfer") public R transfer(HttpServletRequest request, HttpServletResponse response) { String openid = request.getParameter("openid"); String amount = request.getParameter("amount"); Map<String, Object> resultInfo = new HashMap<String, Object>(); String tk_order_id = Sha1Util.getTXOrderNumber(); String uuid = UUID.randomUUID().toString().trim().replaceAll("-", ""); System.out.println(" == >> "+tk_order_id); String mch_appid = HmhConfig.APP_ID; //商户账号appid String mchid = HmhConfig.pertenr; //商户号 String nonce_str = uuid; //随机32位字符串 String partner_trade_no = tk_order_id; //商户订单号// String openid = "";//用户openid String check_name = "NO_CHECK"; //校验用户姓名选项 (NO_CHECK：不校验真实姓名 FORCE_CHECK：强校验真实姓名) String re_user_name = "xxx"; //收款用户姓名// String amount = ""; //企业付款金额，单位为分 String desc = "xxx"; //企业付款备注 String spbill_create_ip = "10.2.3.11"; //Ip地址 SortedMap<String, String> packageParams = new TreeMap<String, String>(); packageParams.put("mch_appid", mch_appid); packageParams.put("mchid", mchid); packageParams.put("nonce_str", nonce_str); packageParams.put("partner_trade_no", partner_trade_no); packageParams.put("openid", openid); packageParams.put("check_name", check_name); packageParams.put("re_user_name", re_user_name); packageParams.put("amount", amount); packageParams.put("desc", desc); packageParams.put("spbill_create_ip", spbill_create_ip); RequestHandler reqHandler = new RequestHandler(request, response); reqHandler.init(mch_appid, HmhConfig.APP_secret, HmhConfig.pertnerKey); String sign = reqHandler.createSign(packageParams); ////签名 String transferXml = "<xml>" + "<mch_appid>"+mch_appid+"</mch_appid>" + "<mchid>"+mchid+"</mchid>" + "<nonce_str>"+nonce_str+"</nonce_str>" + "<partner_trade_no>"+partner_trade_no+"</partner_trade_no>" + "<openid>"+openid+"</openid>" + "<check_name>"+check_name+"</check_name>" + "<re_user_name>"+re_user_name+"</re_user_name>" + "<amount>"+amount+"</amount>" + "<desc>"+desc+"</desc>" + "<spbill_create_ip>"+spbill_create_ip+"</spbill_create_ip>" + "<sign>"+sign+"</sign>" + "</xml>"; String result= new GetWxOrderno().getPayNo(HmhConfig.transferurl, transferXml); resultInfo.put("status",1); resultInfo.put("msg",result); return R.ok(1,resultInfo); }注意，小程序提现需要配置证书
当发现调用不起来支付时请检查，域名，商户后台配置支付目录。
微信支付文档：https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_1
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