YYGH-10-微信支付

微信支付的介绍

1.微信支付的支付申请

微信扫码支付是商户系统按微信支付协议生成支付二维码，用户再用微信“扫一扫”完成支付的模式。该模式适用于PC网站支付、实体店单品或订单支付、媒体广告支付等场景。

申请步骤：（了解）

第一步：注册公众号（类型须为：服务号）

请根据营业执照类型选择以下主体注册：个体工商户| 企业/公司| 政府| 媒体| 其他类型。

第二步：认证公众号

公众号认证后才可申请微信支付，认证费：300元/年。

第三步：提交资料申请微信支付

登录公众平台，点击左侧菜单【微信支付】，开始填写资料等待审核，审核时间为1-5个工作日内。

第四步：开户成功，登录商户平台进行验证

资料审核通过后，请登录联系人邮箱查收商户号和密码，并登录商户平台填写财付通备付金打的小额资金数额，完成账户验证。

第五步：在线签署协议

本协议为线上电子协议，签署后方可进行交易及资金结算，签署完立即生效。

2.开发文档

微信支付接口调用的整体思路：

按API要求组装参数，以XML方式发送（POST）给微信支付接口（URL）,微信支付接口也是以XML方式给予响应。程序根据返回的结果（其中包括支付URL）生成二维码或判断订单状态。

在线微信支付开发文档：

https://pay.weixin.qq.com/wiki/doc/api/index.html

appid：微信公众账号或开放平台APP的唯一标识
mch_id：商户号 (配置文件中的partner)
partnerkey：商户密钥
sign:数字签名, 根据微信官方提供的密钥和一套算法生成的一个加密信息, 就是为了保证交易的安全性

3.微信支付SDK

 <dependency><groupId>com.github.wxpay</groupId><artifactId>wxpay-sdk</artifactId><version>0.0.3</version></dependency>

我们主要会用到微信支付SDK的以下功能：

1.获取随机字符串

WXPayUtil.*generateNonceStr()

2.MAP转换为XML字符串（自动添加签名）

WXPayUtil.*generateSignedXml*(param, partnerkey)

3.XML字符串转换为MAP

WXPayUtil.*xmlToMap*(result)

微信支付开发

二维码的显示

我们来分析一下支付的流程

1.用户在前台点击支付,前端将要支付的订单号传送给后端

2.MVC得到这个订单号,根据订单号查询出对应订单,利用https客户机向微信后台发送请求

3.微信后台请求传送回了二维码，在前端显示

service

//生成二维码
@Override
public Map createNative(Long orderId) {try {//先尝试在redis中获取数据Map payMap = (Map) redisTemplate.opsForValue().get(orderId.toString());if (payMap != null) {return payMap;}//1.根据orderId获取订单信息OrderInfo orderInfo = orderService.getById(orderId);//2.向支付记录表添加信息paymentService.savePaymentInfo(orderInfo, PaymentTypeEnum.WEIXIN.getStatus());//3.设置参数,调用微信生成二维码的接口//把参数转换成xml格式,使用商户key进行加密Map paramMap = getMap(orderInfo);//4.调用HttpClientHttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/unifiedorder");//设置参数client.setXmlParam(WXPayUtil.generateSignedXml(paramMap, ConstantPropertiesUtils.PARTNERKEY));client.setHttps(true);client.post();//5.返回相关数据String xml = client.getContent();//转换成map集合Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);//4、封装返回结果集Map map = new HashMap<>();map.put("orderId", orderId);map.put("totalFee", orderInfo.getAmount());map.put("resultCode", resultMap.get("result_code"));map.put("codeUrl", resultMap.get("code_url")); //二维码地址if (null != resultMap.get("result_code")) {//微信支付二维码2小时过期，可采取2小时未支付取消订单redisTemplate.opsForValue().set(orderId.toString(), map, 1000, TimeUnit.MINUTES);}return map;} catch (Exception e) {throw new RuntimeException(e);}
}

controller

//生成微信支付扫描的二维码
@GetMapping("/createNative/{orderId}")
public Result createNative(@PathVariable Long orderId) {log.info("开始创建二维码" + orderId);Map aNative = weixinService.createNative(orderId);return Result.ok(aNative);
}

工具类

@Component
public class ConstantPropertiesUtils implements InitializingBean {@Value("${weixin.appid}")private String appid;@Value("${weixin.partner}")private String partner;@Value("${weixin.partnerkey}")private String partnerkey;public static String APPID;public static String PARTNER;public static String PARTNERKEY;@Overridepublic void afterPropertiesSet() throws Exception {APPID = appid;PARTNER = partner;PARTNERKEY = partnerkey;}
}

import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.*;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;import javax.net.ssl.SSLContext;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.KeyStore;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.ParseException;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;/*** http请求客户端*/
public class HttpClient {private String url;private Map<String, String> param;private int statusCode;private String content;private String xmlParam;private boolean isHttps;private boolean isCert = false;//证书密码 微信商户号（mch_id）private String certPassword;public boolean isHttps() {return isHttps;}public void setHttps(boolean isHttps) {this.isHttps = isHttps;}public boolean isCert() {return isCert;}public void setCert(boolean cert) {isCert = cert;}public String getXmlParam() {return xmlParam;}public void setXmlParam(String xmlParam) {this.xmlParam = xmlParam;}public HttpClient(String url, Map<String, String> param) {this.url = url;this.param = param;}public HttpClient(String url) {this.url = url;}public String getCertPassword() {return certPassword;}public void setCertPassword(String certPassword) {this.certPassword = certPassword;}public void setParameter(Map<String, String> map) {param = map;}public void addParameter(String key, String value) {if (param == null)param = new HashMap<String, String>();param.put(key, value);}public void post() throws ClientProtocolException, IOException {HttpPost http = new HttpPost(url);setEntity(http);execute(http);}public void put() throws ClientProtocolException, IOException {HttpPut http = new HttpPut(url);setEntity(http);execute(http);}public void get() throws ClientProtocolException, IOException {if (param != null) {StringBuilder url = new StringBuilder(this.url);boolean isFirst = true;for (String key : param.keySet()) {if (isFirst)url.append("?");elseurl.append("&");url.append(key).append("=").append(param.get(key));}this.url = url.toString();}HttpGet http = new HttpGet(url);execute(http);}/*** set http post,put param*/private void setEntity(HttpEntityEnclosingRequestBase http) {if (param != null) {List<NameValuePair> nvps = new LinkedList<NameValuePair>();for (String key : param.keySet())nvps.add(new BasicNameValuePair(key, param.get(key))); // 参数http.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8)); // 设置参数}if (xmlParam != null) {http.setEntity(new StringEntity(xmlParam, Consts.UTF_8));}}private void execute(HttpUriRequest http) throws ClientProtocolException,IOException {CloseableHttpClient httpClient = null;try {if (isHttps) {if(isCert) {FileInputStream inputStream = new FileInputStream(new File(ConstantPropertiesUtils.CERT));KeyStore keystore = KeyStore.getInstance("PKCS12");char[] partnerId2charArray = certPassword.toCharArray();keystore.load(inputStream, partnerId2charArray);SSLContext sslContext = SSLContexts.custom().loadKeyMaterial(keystore, partnerId2charArray).build();SSLConnectionSocketFactory sslsf =new SSLConnectionSocketFactory(sslContext,new String[] { "TLSv1" },null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();} else {SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {// 信任所有public boolean isTrusted(X509Certificate[] chain,String authType)throws CertificateException {return true;}}).build();SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();}} else {httpClient = HttpClients.createDefault();}CloseableHttpResponse response = httpClient.execute(http);try {if (response != null) {if (response.getStatusLine() != null)statusCode = response.getStatusLine().getStatusCode();HttpEntity entity = response.getEntity();// 响应内容content = EntityUtils.toString(entity, Consts.UTF_8);}} finally {response.close();}} catch (Exception e) {e.printStackTrace();} finally {httpClient.close();}}public int getStatusCode() {return statusCode;}public String getContent() throws ParseException, IOException {return content;}
}

前端

api/weixin.js

//查询订单状态
queryPayStatus(orderId) {return request({url: `${weixin_api_name}/queryPayStatus/${orderId}`,method: 'get'})
},
//生成微信支付的二维码
createNative(orderId) {return request({url: `${weixin_api_name}/createNative/${orderId}`,method: `get`,})
},

pages/order/show.vue

pay() {this.dialogPayVisible = trueweixinApi.createNative(this.orderId).then(response => {this.payObj = response.dataif(this.payObj.codeUrl === '') {this.dialogPayVisible = falsethis.$message.error("支付错误")} else {this.timer = setInterval(() => {this.queryPayStatus(this.orderId)}, 3000);}})
},
queryPayStatus(orderId) {weixinApi.queryPayStatus(orderId).then(response => {if (response.message === '支付中') {return}clearInterval(this.timer);window.location.reload()})
},
closeDialog() {if(this.timer) {clearInterval(this.timer);}

这样我们就可以在前端看到支付要用的二维码了,当我们选择支付之后就回在微信后台得到数据

监测交易状态

可能有人注意到了

  this.timer = setInterval(() => {this.queryPayStatus(this.orderId)}, 3000);

我这里有一组这样的代码

这个是每3s查询一次交易状态,如果交易成功直接跳转,在后台是这样做的

controller

//查询支付状态
@GetMapping("/queryPayStatus/{orderId}")
public Result queryPayStatus(@PathVariable Long orderId) {log.info("查询支付订单状态");//调用微信接口实现支付状态查询Map<String, String> resultMap = weixinService.queryPayStatus(orderId);//判断if (resultMap == null) {return Result.fail().message("支付出错");}if ("SUCCESS".equals(resultMap.get("trade_state"))) {//支付成功,更新订单状态String tradeNo = resultMap.get("out_trade_no");paymentService.paySuccess(tradeNo,resultMap);return Result.ok().message("支付成功");}return Result.ok().message("支付中");
}

WeixinServiceImpl

@Override
public Map<String, String> queryPayStatus(Long orderId) {try {//1.根据orderId获取订单信息OrderInfo orderInfo = orderService.getById(orderId);//2.封装提交参数Map paramMap = new HashMap();paramMap.put("appid", ConstantPropertiesUtils.APPID);paramMap.put("mch_id", ConstantPropertiesUtils.PARTNER);paramMap.put("out_trade_no", orderInfo.getOutTradeNo());paramMap.put("nonce_str", WXPayUtil.generateNonceStr());//3.设置请求内容HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/orderquery");client.setXmlParam(WXPayUtil.generateSignedXml(paramMap, ConstantPropertiesUtils.PARTNERKEY));client.setHttps(true);client.post();//3、返回第三方的数据，转成MapString xml = client.getContent();Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);//4、返回return resultMap;} catch (Exception e) {return null;}
}

PaymentServiceImpl

    //更新订单状态@Overridepublic void paySuccess(String tradeNo, Map<String, String> resultMap) {//1.根据订单编号得到支付记录QueryWrapper<PaymentInfo> queryWrapper = new QueryWrapper<>();queryWrapper.eq("out_trade_no", tradeNo);queryWrapper.eq("payment_type", PaymentTypeEnum.WEIXIN.getStatus());PaymentInfo paymentInfo = baseMapper.selectOne(queryWrapper);//2.更新支付信息paymentInfo.setPaymentStatus(PaymentStatusEnum.PAID.getStatus());paymentInfo.setCallbackTime(new Date());paymentInfo.setTradeNo(resultMap.get("transaction_id"));paymentInfo.setCallbackContent(resultMap.toString());baseMapper.updateById(paymentInfo);//3.根据订单号得到订单信息log.info(String.valueOf(paymentInfo.getOrderId()));OrderInfo orderInfo = orderService.getById(paymentInfo.getOrderId());orderInfo.setOrderStatus(OrderStatusEnum.PAID.getStatus());//4.更新订单信息orderService.updateById(orderInfo);//5.调用医院接口,更新支付信息hospApi(orderInfo);}/*** 获取支付记录** @param orderId* @param paymentType* @return*/@Overridepublic PaymentInfo getPaymentInfo(Long orderId, Integer paymentType) {QueryWrapper queryWrapper = new QueryWrapper();queryWrapper.eq("order_id", orderId);queryWrapper.eq("payment_type", paymentType);return baseMapper.selectOne(queryWrapper);}private void hospApi(OrderInfo orderInfo) {SignInfoVo signInfoVo = hospitalFeignClient.getSignInfoVo(orderInfo.getHoscode());if (null == signInfoVo) {throw new YyghException(ResultCodeEnum.PARAM_ERROR);}Map<String, Object> reqMap = new HashMap<>();reqMap.put("hoscode", orderInfo.getHoscode());reqMap.put("hosRecordId", orderInfo.getHosRecordId());reqMap.put("timestamp", HttpRequestHelper.getTimestamp());String sign = HttpRequestHelper.getSign(reqMap, signInfoVo.getSignKey());reqMap.put("sign", sign);JSONObject result = HttpRequestHelper.sendRequest(reqMap, signInfoVo.getApiUrl() + "/order/updatePayStatus");if (result.getInteger("code") != 200) {throw new YyghException(result.getString("message"), ResultCodeEnum.FAIL.getCode());}}

微信退款

微信退款的流程:

1.前台页面传来要退款的订单id

2.后台根据这个id得到对应的订单,将这个订单的信息在取消预约的表中保存一份,状态为退款中

3.向微信后台发送请求,得到如果退款成功,更新订单状态,

4.利用rabbitmq

后端

@Override
public Boolean cancelOrder(Long orderId) {//1.根据订单id得到订单信息OrderInfo orderInfo = orderService.getById(orderId);//2.判断是否取消DateTime quitTime = new DateTime(orderInfo.getQuitTime());//校验时间,对比最后时间与现在/*if (quitTime.isBeforeNow()) {throw new YyghException(ResultCodeEnum.CANCEL_ORDER_NO);}*///3.调用医院接口实现预约取消SignInfoVo signInfoVo = hospitalFeignClient.getSignInfoVo(orderInfo.getHoscode());if (null == signInfoVo) {throw new YyghException(ResultCodeEnum.PARAM_ERROR);}Map<String, Object> reqMap = new HashMap<>();reqMap.put("hoscode", orderInfo.getHoscode());reqMap.put("hosRecordId", orderInfo.getHosRecordId());reqMap.put("timestamp", HttpRequestHelper.getTimestamp());String sign = HttpRequestHelper.getSign(reqMap, signInfoVo.getSignKey());reqMap.put("sign", sign);JSONObject result = HttpRequestHelper.sendRequest(reqMap, signInfoVo.getApiUrl() + "/order/updateCancelStatus");//根据医院接口返回数据if (result.getInteger("code") != 200) {throw new YyghException(ResultCodeEnum.PARAM_ERROR);} else {//判断当前订单是否已支付if (orderInfo.getOrderStatus().intValue() == OrderStatusEnum.PAID.getStatus().intValue()) {Boolean refund = this.refund(orderId);if (!refund) {throw new YyghException(ResultCodeEnum.CANCEL_ORDER_FAIL);}//更新订单状态orderInfo.setOrderStatus(OrderStatusEnum.CANCLE.getStatus());orderService.updateById(orderInfo);//剩余数量+1//发送mq信息更新预约数 我们与下单成功更新预约数使用相同的mq信息，不设置可预约数与剩余预约数，接收端可预约数减1即可rabbitMq(orderInfo);}return true;}
}private void rabbitMq(OrderInfo orderInfo) {OrderMqVo orderMqVo = new OrderMqVo();orderMqVo.setScheduleId(orderInfo.getScheduleId());//短信提示MsmVo msmVo = new MsmVo();msmVo.setPhone(orderInfo.getPatientPhone());msmVo.setTemplateCode("SMS_194640722");String reserveDate = new DateTime(orderInfo.getReserveDate()).toString("yyyy-MM-dd") + (orderInfo.getReserveTime()==0 ? "上午": "下午");Map<String,Object> param = new HashMap<String,Object>(){{put("title", orderInfo.getHosname()+"|"+ orderInfo.getDepname()+"|"+ orderInfo.getTitle());put("reserveDate", reserveDate);put("name", orderInfo.getPatientName());}};msmVo.setParam(param);orderMqVo.setMsmVo(msmVo);rabbitService.sendMessage(MqConst.EXCHANGE_DIRECT_ORDER, MqConst.ROUTING_ORDER, orderMqVo);
}

前端

//取消预约
cancelOrder() {this.$confirm('确定取消预约吗?', '提示', {confirmButtonText: '确定',cancelButtonText: '取消',type: 'warning'}).then(() => { // promise// 点击确定，远程调用return weixinApi.cancelOrder(this.orderId)}).then((response) => {this.$message.success('取消成功')this.init()}).catch(() => {this.$message.info('已取消取消预约')})
},