uni-app开发经验分享八： 实现微信APP支付的全过程详解

前端代码很简单，重点是如何让后端返回OrderInfo以及OrderInfo的格式。

<template>
<view>
<page-head :title="title"></page-head>
<view class="uni-padding-wrap">
<view>
<view class="uni-hello-text uni-center">支付金额</text></view>
<view class="uni-h1 uni-center uni-common-mt">
<text class="rmbLogo">￥</text>
<input class="price" type="digit" :value="price" maxlength="4" @input="priceChange" />
</view>
</view>
<view class="uni-btn-v uni-common-mt">
<!-- #ifdef APP-PLUS -->
<template v-if="providerList.length > 0">
<button v-for="(item,index) in providerList" :key="index" @click="requestPayment(item,index)"
:loading="item.loading">{{item.name}}支付</button>
</template>
<!-- #endif -->
</view>
</view>
</view>
</view>
</template>
<script>
export default {
data() {
return {
title: 'request-payment',loading: false,price: 1,providerList: []
}
},onLoad: function() {
// #ifdef APP-PLUS
uni.getProvider({
service: "payment",success: (e) => {
console.log("payment success:" + JSON.stringify(e));
let providerList = [];
e.provider.map((value) => {
switch (value) {
case 'alipay':
providerList.push({
name: '支付宝',id: value,loading: false
});
break;
case 'wxpay':
providerList.push({
name: '微信',loading: false
});
break;
default:
break;
}
})
this.providerList = providerList;
},fail: (e) => {
console.log("获取支付通道失败：",e);
}
});
// #endif
},methods: {
async requestPayment(e,index) {
this.providerList[index].loading = true;
let orderInfo = await this.getOrderInfo(e.id);
console.log("得到订单信息",orderInfo);
if (orderInfo.statusCode !== 200) {
console.log("获得订单信息失败",orderInfo);
uni.showModal({
content: "获得订单信息失败",showCancel: false
})
return;
}
uni.requestPayment({
provider: e.id,orderInfo: orderInfo.data.data,success: (e) => {
console.log("success",e);
uni.showToast({
title: "感谢您的赞助!"
})
},fail: (e) => {
console.log("fail",e);
uni.showModal({
content: "支付失败,原因为: " + e.errMsg,showCancel: false
})
},complete: () => {
this.providerList[index].loading = false;
}
})
},getOrderInfo(e) {
let appid = "";
// #ifdef APP-PLUS
appid = plus.runtime.appid;
// #endif
let url = 'http://10.10.60.200:8070/sc-admin/sales/wx/prepay/?brokerId=shba01';
return new Promise((res) => {
uni.request({
url: url,success: (result) => {
res(result);
},fail: (e) => {
res(e);
}
})
})
},priceChange(e) {
console.log(e.detail.value)
this.price = e.detail.value;
}
}
}
</script>
<style>
.rmbLogo {
font-size: 40upx;
}
button {
background-color: #007aff;
color: #ffffff;
}
.uni-h1.uni-center {
display: flex;
flex-direction: row;
justify-content: center;
align-items: flex-end;
}
.price {
border-bottom: 1px solid #eee;
width: 200upx;
height: 80upx;
padding-bottom: 4upx;
}
.ipaPayBtn {
margin-top: 30upx;
}
</style>

import com.alibaba.fastjson.JSONObject;
import com.bian.common.core.domain.AjaxResult;
import com.bian.common.utils.StringUtils;
import com.bian.framework.config.jwt.AuthService;
import com.bian.sales.entity.Constant;
import com.bian.sales.entity.PayInfo;
import com.bian.sales.service.IWxService;
import com.bian.sales.util.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
import com.thoughtworks.xstream.XStream;
import org.springframework.http.HttpEntity;
import org.slf4j.Logger;
import javax.servlet.http.HttpServletRequest;
import java.util.*;
@Service
public class WxServiceImpl implements IWxService
{
Logger logger = LoggerFactory.getLogger(WxServiceImpl.class);
@Override
public AjaxResult goWeChatPay(String brokerId,HttpServletRequest request) throws Exception {
String clientIP = CommonUtil.getClientIp(request);
logger.error("openId: " + brokerId + ",clientIP: " + clientIP);
String randomNonceStr = RandomUtils.generateMixString(32);
Map<String,String> result = unifiedOrder(brokerId,clientIP,randomNonceStr);
System.out.println(request.toString());
if(StringUtils.isBlank(result.get("prepay_id"))) {
return AjaxResult.error("支付错误");
} else {
logger.info("支付成功");
Map <String,Object>jsonObject = new LinkedHashMap();
String noncestr = RandomUtils.generateMixString(32);
String prepayid = result.get("prepay_id");
String timestamp = String.valueOf(new Date().getTime()/1000);
jsonObject.put("appid",Constant.APP_ID);
jsonObject.put("noncestr",noncestr);
jsonObject.put("package","Sign=WXPay");
jsonObject.put("partnerid",Constant.MCH_ID);
jsonObject.put("prepayid",result.get("prepay_id"));
jsonObject.put("timestamp",new Date().getTime()/1000);
jsonObject.put("sign",getSignforPayment(noncestr,prepayid,timestamp ));
return AjaxResult.success(jsonObject);
}
}
/**
* @Function: 去支付
* @author:   YangXueFeng
* @Date:     2019/6/14 16:50
*/
/**
* 调用统一下单接口
* @param brokerId
*/
private Map<String,String>
(String brokerId,String clientIP,String randomNonceStr) {
try {
//生成预支付交易单，返回正确的预支付交易会话标识后再在APP里面调起支付
String url = Constant.URL_UNIFIED_ORDER;
PayInfo payInfo = createPayInfo(brokerId,randomNonceStr);
String md5 = getSign(payInfo);
payInfo.setSign(md5);
logger.error("md5 value: " + md5);
String xml = CommonUtil.payInfoToXML(payInfo);
xml = xml.replace("__","_").replace("<![CDATA[1]]>","1");
//xml = xml.replace("__","_").replace("<![CDATA[","").replace("]]>","");
logger.error(xml);
StringBuffer buffer = HttpUtil.httpsRequest(url,"POST",xml);
logger.error("unifiedOrder request return body: \n" + buffer.toString());
Map<String,String> result = CommonUtil.parseXml(buffer.toString());
String return_code = result.get("return_code");
if(StringUtils.isNotBlank(return_code) && return_code.equals("SUCCESS")) {
String return_msg = result.get("return_msg");
if(StringUtils.isNotBlank(return_msg) && !return_msg.equals("OK")) {
logger.error("统一下单错误！");
return null;
}
String prepay_Id = result.get("prepay_id");
return result;
} else {
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 生成统一下单接口的请求参数
* https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1
* @param brokerId
* @param clientIP
* @param randomNonceStr
* @return
*/
private PayInfo createPayInfo(String brokerId,String randomNonceStr) {
clientIP ="222.72.148.34";
Date date = new Date();
String timeStart = TimeUtils.getFormatTime(date,Constant.TIME_FORMAT);
String timeExpire = TimeUtils.getFormatTime(TimeUtils.addDay(date,Constant.TIME_EXPIRE),Constant.TIME_FORMAT);
String randomOrderId = CommonUtil.getRandomOrderId(); //生成随机商品订单号
PayInfo payInfo = new PayInfo();
payInfo.setAppid(Constant.APP_ID);
payInfo.setMch_id(Constant.MCH_ID);
payInfo.setDevice_info("WEB");
payInfo.setNonce_str(randomNonceStr);
payInfo.setSign_type("MD5");  //默认即为MD5
payInfo.setBody("必安glJSAPI支付测试");
payInfo.setAttach("支付测试4luluteam");
payInfo.setOut_trade_no(randomOrderId);
payInfo.setTotal_fee(1);
payInfo.setSpbill_create_ip(clientIP);
payInfo.setTime_start(timeStart);
payInfo.setTime_expire(timeExpire);
payInfo.setNotify_url(Constant.URL_NOTIFY);
payInfo.setTrade_type("APP");
payInfo.setLimit_pay("no_credit");
//        payInfo.setOpenid(brokerId);
return payInfo;
}
private String getSign(PayInfo payInfo) throws Exception {
StringBuffer sb = new StringBuffer();
sb.append("appid=" + payInfo.getAppid())
.append("&attach=" + payInfo.getAttach())
.append("&body=" + payInfo.getBody())
.append("&device_info=" + payInfo.getDevice_info())
.append("&limit_pay=" + payInfo.getLimit_pay())
.append("&mch_id=" + payInfo.getMch_id())
.append("&nonce_str=" + payInfo.getNonce_str())
.append("&notify_url=" + payInfo.getNotify_url())
//                .append("&openid=" + payInfo.getOpenid())
.append("&out_trade_no=" + payInfo.getOut_trade_no())
.append("&sign_type=" + payInfo.getSign_type())
.append("&spbill_create_ip=" + payInfo.getSpbill_create_ip())
.append("&time_expire=" + payInfo.getTime_expire())
.append("&time_start=" + payInfo.getTime_start())
.append("&total_fee=" + payInfo.getTotal_fee())
.append("&trade_type=" + payInfo.getTrade_type())
.append("&key=" + Constant.API_KEY);
System.out.println("排序后的拼接参数：" + sb.toString());
return CommonUtil.getMD5(sb.toString().trim()).toUpperCase();
}
private String getSignforPayment(String noncestr,String prepayid,String timestamp) throws Exception {
StringBuffer sb = new StringBuffer();
sb.append("appid=" +Constant.APP_ID)
.append("&noncestr=" + noncestr)
.append("&package=" + "Sign=WXPay")
.append("&partnerid=" + Constant.MCH_ID)
.append("&prepayid=" + prepayid)
.append("&timestamp=" + timestamp)
.append("&key=" + Constant.API_KEY);
System.out.println("排序后的拼接参数：" + sb.toString());
return CommonUtil.getMD5(sb.toString().trim()).toUpperCase();
}
}

{"data": {
"appid": "wx0411fa6a39d61297","noncestr": "5JigiIJicbq8hQI2","package": "Sign=WXPay","partnerid": "1230636401","prepayid": "wx21204902147233e222e12d451613768000","timestamp": 1571662142,"sign": "0E5C9B9B1C8D7497A234CCC3C721AB1F"
},"statusCode": 200,"header": {
"Content-Type": "text/plain;charset=UTF-8","X-Android-Response-Source": "NETWORK 200","Date": "Mon,21 Oct 2019 12:49:02 GMT","EagleId": "74cf71a315716621419605339e","Vary": "[Accept-Encoding,Accept-Encoding]","X-Android-Received-Millis": "1571662145735","Timing-Allow-Origin": "*","_": "HTTP/1.1 200 OK","X-Android-Selected-Protocol": "http/1.1","Connection": "keep-alive","Via": "cache28.l2et15-1[208,0],kunlun5.cn1241[504,0]","X-Android-Sent-Millis": "1571662145071","Access-Control-Allow-Origin": "*","Server": "Tengine","Transfer-Encoding": "chunked"
},"errMsg": "request:ok"
}