微信小程序前端支付

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//index.js Page({   data: {     },   //点击支付按钮进行支付   payclick: function () {     var t = this;     wx.login({       //获取code换取openID       success: function (res) {         //code = res.code //返回code         console.log("获取code");         console.log(res.code);         var opid = t.getOpenId(res.code);       }     })   },   //获取openID   getOpenId: function (code) {     var that = this;     wx.request({       url: "https://api.weixin.qq.com/sns/jscode2session?appid=你的appid&secret=AppSecret(小程序密钥)&js_code=" + code + "&grant_type=authorization_code",       data: {},       method: 'GET',       success: function (res) {         console.log("获取openid")         console.log(res)         that.setData({           openid: res.data.openid,           session_key: res.data.session_key         })         that.generateOrder(res.data.openid)       },       fail: function () {         // fail       },       complete: function () {         // complete       }     })   },   //生成商户订单   generateOrder: function (openid) {     var that = this     wx.request({       url: 'http://localhost:25492/wx/getda',//后台请求地址       method: 'GET',       data: {         gfee: '商品价钱',         gname: '商品名称',         openId: openid         //（商品价钱和商品名称根据自身需要是否传值, openid为必传）       },       success: function (res) {         console.log("后台获取数据成功");         console.log(res);         var param = { "timeStamp": res.data.timeStamp, "package": res.data.package, "paySign": res.data.paySign, "signType": "MD5", "nonceStr": res.data.nonceStr };          //发起支付         that.pay(param);       },       fail: function (res) {         console.log("向后台发送数据失败")       }     })   },   //支付   pay: function (param) {     var that = this;     console.log("发起支付")     console.log(param)     wx.requestPayment({       timeStamp: param.timeStamp,       nonceStr: param.nonceStr,       package: param.package,       signType: param.signType,       paySign: param.paySign,       success: function (res) {         console.log("success");         console.log(res);       },       fail: function (res) {         console.log("fail")         console.log(res);       },       complete: function (res) {         console.log("complete");         console.log(res)       }     })   } })