尚医通 (三十六) --------- 微信支付

叁歲伎倆 2024-03-30 09:03 88阅读 0赞

#### 目录 ####

*  一、微信支付介绍
 *  二、微信支付开发
 *   *  1. api 接口
     *  2. 前端
     *  3. 处理支付结果
 *  三、取消预约
 *   *  1. 需求描述
     *  2. 开发微信退款接口
     *  3. 前端

--------------------

## 一、微信支付介绍 ##

**A、微信扫码支付申请**

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。

**B、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][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

**C、微信支付 SDK**

添加依赖

<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)

## 二、微信支付开发 ##

### 1. api 接口 ###

场景：用户扫描商户展示在各种场景的二维码进行支付

使用案例：

*  线下：家乐福超市、7-11便利店、上品折扣线下店等
 *  线上：大众点评网站、携程网站、唯品会、美丽说网站等

开发模式：

*  模式一：商户在后台给你生成二维码，用户打开扫一扫
 *  模式二：商户后台系统调用微信支付【统一下单API】生成预付交易，将接口返回的链接生成二维码，用户扫码后输入密码完成支付交易。

注意：该模式的预付单有效期为2小时，过期后无法支付。

微信支付：生成 xml 发送请求  
操作模块：service-order

**A、引入依赖**

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

**B、添加配置**

在 application.properties 中添加商户信息

spring.redis.host=192.168.44.165
    spring.redis.port=6379
    spring.redis.database= 0
    spring.redis.timeout=1800000
    spring.redis.lettuce.pool.max-active=20
    spring.redis.lettuce.pool.max-wait=-1
    #最大阻塞等待时间(负数表示没限制)
    spring.redis.lettuce.pool.max-idle=5
    spring.redis.lettuce.pool.min-idle=0
    
    #关联的公众号appid
    weixin.pay.appid=wx74862e0dfcf69954
    #商户号
    weixin.pay.partner=1558950191
    #商户key
    weixin.pay.partnerkey=T6m9iK73b0kn9g5v426MKfHQH7X8rKwb

**C、引入工具类**

@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;
        @Override
        public 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("?");
                else
                   url.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;
       }
    }

**D、添加交易记录接口**

① 添加 Mapper

public interface PaymentInfoMapper extends BaseMapper<PaymentInfo> {
        
    }

② 添加 service 接口与实现

添加 PaymentService 类

public interface PaymentService extends IService<PaymentInfo> {
        
        /**
         * 保存交易记录
         * @param order
         * @param paymentType 支付类型（1：微信 2：支付宝）
         */
        void savePaymentInfo(OrderInfo order, Integer paymentType);
    
    }

添加 PaymentServiceImpl 实现类

@Service
    public class PaymentServiceImpl extends ServiceImpl<PaymentInfoMapper, PaymentInfo>  implements PaymentService {
        
        /**
         * 保存交易记录
         * @param orderInfo
         * @param paymentType 支付类型（1：微信 2：支付宝）
         */
        @Override
        public void savePaymentInfo(OrderInfo orderInfo, Integer paymentType) {
        
            QueryWrapper<PaymentInfo> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("order_id", orderInfo.getId());
            queryWrapper.eq("payment_type", paymentType);
            Integer count = baseMapper.selectCount(queryWrapper);
            if(count >0) return;
            // 保存交易记录
            PaymentInfo paymentInfo = new PaymentInfo();
            paymentInfo.setCreateTime(new Date());
            paymentInfo.setOrderId(orderInfo.getId());
            paymentInfo.setPaymentType(paymentType);
            paymentInfo.setOutTradeNo(orderInfo.getOutTradeNo());
            paymentInfo.setPaymentStatus(PaymentStatusEnum.UNPAID.getStatus());
            String subject = new DateTime(orderInfo.getReserveDate()).toString("yyyy-MM-dd")+"|"+orderInfo.getHosname()+"|"+orderInfo.getDepname()+"|"+orderInfo.getTitle();
            paymentInfo.setSubject(subject);
            paymentInfo.setTotalAmount(orderInfo.getAmount());
            baseMapper.insert(paymentInfo);
        }
    }

**E、添加支付 service 接口与实现**

添加 com.fancy.yygh.order.service.WeixinService 类

public interface WeixinService {
        
        /**
         * 根据订单号下单，生成支付链接
         */
        Map createNative(Long orderId);
    }

添加 com.fancy.yygh.order.service.impl.WeixinServiceImpl 类

@Service
    public class WeixinServiceImpl implements WeixinService {
        
    
        @Autowired
        private OrderService orderService;
        @Autowired
        private PaymentService paymentService;
        @Autowired
        private RedisTemplate redisTemplate;
        /**
         * 根据订单号下单，生成支付链接
         */
        @Override
        public Map createNative(Long orderId) {
        
            try {
        
                Map payMap = (Map) redisTemplate.opsForValue().get(orderId.toString());
                if(null != payMap) return payMap;
                //根据id获取订单信息
                OrderInfo order = orderService.getById(orderId);
                // 保存交易记录
                paymentService.savePaymentInfo(order, PaymentTypeEnum.WEIXIN.getStatus());
                //1、设置参数
                Map paramMap = new HashMap();
                paramMap.put("appid", ConstantPropertiesUtils.APPID);
                paramMap.put("mch_id", ConstantPropertiesUtils.PARTNER);
                paramMap.put("nonce_str", WXPayUtil.generateNonceStr());
                String body = order.getReserveDate() + "就诊"+ order.getDepname();
                paramMap.put("body", body);
                paramMap.put("out_trade_no", order.getOutTradeNo());
                //paramMap.put("total_fee", order.getAmount().multiply(new BigDecimal("100")).longValue()+"");
                paramMap.put("total_fee", "1");
                paramMap.put("spbill_create_ip", "127.0.0.1");
                paramMap.put("notify_url", "http://guli.shop/api/order/weixinPay/weixinNotify");
                paramMap.put("trade_type", "NATIVE");
                //2、HTTPClient来根据URL访问第三方接口并且传递参数
                HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/unifiedorder");
                //client设置参数
                client.setXmlParam(WXPayUtil.generateSignedXml(paramMap, ConstantPropertiesUtils.PARTNERKEY));
                client.setHttps(true);
                client.post();
                //3、返回第三方的数据
                String xml = client.getContent();
                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", order.getAmount());
                map.put("resultCode", resultMap.get("result_code"));
                map.put("codeUrl", resultMap.get("code_url"));
                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) {
        
                e.printStackTrace();
                return new HashMap<>();
            }
        }
    }

**F、添加 controller 方法**

@RestController
    @RequestMapping("/api/order/weixin")
    public class WeixinController {
        
        @Autowired
        private WeixinService weixinPayService;
        /**
         * 下单 生成二维码
         */
        @GetMapping("/createNative/{orderId}")
        public Result createNative(
                @ApiParam(name = "orderId", value = "订单id", required = true)
                @PathVariable("orderId") Long orderId) {
        
            return Result.ok(weixinPayService.createNative(orderId));
        }
    }

### 2. 前端 ###

**A、封装 api 请求**

添加 /api/order/weixin.js 文件

createNative(orderId) {
        
        return request({
        
        	url: `/api/order/weixin/createNative/${
        orderId}`,
       		method: 'get'
        })
    },

**B、引入 vue-qriously 生成二维码**

安装vue-qriously

npm install vue-qriously

2、引入

在 /plugins/myPlugin.js 文件添加引入

import VueQriously from 'vue-qriously'
    Vue.use(VueQriously)

**C、页面展示**

修改 /pages/order/show.vue 组件

<template>
      
      <div class="nav-container page-component">
        
        <div class="nav left-nav">
          <div class="nav-item ">
            <span class="v-link clickable dark" onclick="javascript:window.location='/user'">实名认证 </span>
          </div>
          <div class="nav-item selected">
            <span class="v-link selected dark" onclick="javascript:window.location='/order'"> 挂号订单 </span>
          </div>
          <div class="nav-item ">
            <span class="v-link clickable dark" onclick="javascript:window.location='/patient'"> 就诊人管理 </span>
          </div>
          <div class="nav-item ">
            <span class="v-link clickable dark"> 修改账号信息 </span>
          </div>
          <div class="nav-item ">
            <span class="v-link clickable dark"> 意见反馈 </span>
          </div>
        </div>
        
        
        <div class="page-container">
          <div class="order-detail">
            <div class="title"> 挂号详情</div>
            <div class="status-bar">
              <div class="left-wrapper">
                <div class="status-wrapper BOOKING_SUCCESS">
                  <span class="iconfont"></span> {
       { orderInfo.param.orderStatusString }}
                </div>
              </div>
              <div class="right-wrapper">
                <img src="//img.114yygh.com/static/web/code_order_detail.png" class="code-img">
                <div class="content-wrapper">
                  <div> 微信<span class="iconfont"></span>关注“预约挂号”</div>
                  <div class="watch-wrapper"> 快速挂号，轻松就医</div>
                </div>
              </div>
            </div>
            <div class="info-wrapper">
              <div class="title-wrapper">
                <div class="block"></div>
                <div>挂号信息</div>
              </div>
              <div class="info-form">
                <el-form ref="form" :model="form">
                  <el-form-item label="就诊人信息：">
                    <div class="content"><span>{
       { orderInfo.patientName }}</span></div>
                  </el-form-item>
                  <el-form-item label="就诊日期：">
                    <div class="content"><span>{
       { orderInfo.reserveDate }} {
       { orderInfo.reserveTime == 0 ? '上午' : '下午' }}</span></div>
                  </el-form-item>
                  <el-form-item label="就诊医院：">
                    <div class="content"><span>{
       { orderInfo.hosname }} </span></div>
                  </el-form-item>
                  <el-form-item label="就诊科室：">
                    <div class="content"><span>{
       { orderInfo.depname }} </span></div>
                  </el-form-item>
                  <el-form-item label="医生职称：">
                    <div class="content"><span>{
       { orderInfo.title }} </span></div>
                  </el-form-item>
                  <el-form-item label="医事服务费：">
                    <div class="content">
                      <div class="fee">{
       { orderInfo.amount }}元
                      </div>
                    </div>
                  </el-form-item>
                  <el-form-item label="挂号单号：">
                    <div class="content"><span>{
       { orderInfo.outTradeNo }} </span></div>
                  </el-form-item>
                  <el-form-item label="挂号时间：">
                    <div class="content"><span>{
       { orderInfo.createTime }}</span></div>
                  </el-form-item>
                </el-form>
              </div>
            </div>
            <div class="rule-wrapper mt40">
              <div class="rule-title"> 注意事项</div>
              <div>1、请确认就诊人信息是否准确，若填写错误将无法取号就诊，损失由本人承担；<br>
                <span style="color:red">2、【取号】就诊当天需在{
       { orderInfo.fetchTime }}在医院取号，未取号视为爽约，该号不退不换；</span><br>
                3、【退号】在{
       { orderInfo.quitTime }}前可在线退号 ，逾期将不可办理退号退费；<br>
                4、预约挂号支持自费患者使用身份证预约，同时支持北京市医保患者使用北京社保卡在平台预约挂号。请于就诊当日，携带预约挂号所使用的有效身份证件到院取号；<br>
                5、请注意北京市医保患者在住院期间不能使用社保卡在门诊取号。
              </div>
            </div>
            <div class="bottom-wrapper mt60" v-if="orderInfo.orderStatus == 0 || orderInfo.orderStatus == 1">
              <div class="button-wrapper">
                <div class="v-button white" @click="cancelOrder()">取消预约</div>
              </div>
              <div class="button-wrapper ml20" v-if="orderInfo.orderStatus == 0">
                <div class="v-button" @click="pay()">支付</div>
              </div>
            </div>
          </div>
        </div>
        
        <el-dialog :visible.sync="dialogPayVisible" style="text-align: left" :append-to-body="true" width="500px" @close="closeDialog">
          <div class="container">
            <div class="operate-view" style="height: 350px;">
              <div class="wrapper wechat">
                <div>
                  <qriously :value="payObj.codeUrl" :size="220"/>
                  <div style="text-align: center;line-height: 25px;margin-bottom: 40px;">
                    请使用微信扫一扫<br/>
                    扫描二维码支付
                  </div>
                </div>
              </div>
            </div>
          </div>
        </el-dialog>
      </div>
    </template>
    <script>
    import '~/assets/css/hospital_personal.css'
    import '~/assets/css/hospital.css'
    import orderInfoApi from '@/api/orderInfo'
    import weixinApi from '@/api/weixin'
    export default {
          
      data() {
          
        return {
          
          orderId: null,
          orderInfo: {
          
            param: {
          }
          },
          dialogPayVisible: false,
          payObj: {
          },
          timer: null  // 定时器名称
        }
      },
      created() {
          
        this.orderId = this.$route.query.orderId
        this.init()
      },
      methods: {
          
        init() {
          
          orderInfoApi.getOrders(this.orderId).then(response => {
          
            console.log(response.data);
            this.orderInfo = response.data
          })
        },
        pay() {
          
          this.dialogPayVisible = true
          weixinApi.createNative(this.orderId).then(response => {
          
            this.payObj = response.data
            if(this.payObj.codeUrl == '') {
          
              this.dialogPayVisible = false
              this.$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);
          }
        }
      }
    }
    </script>
    <style>
      .info-wrapper {
          
        padding-left: 0;
        padding-top: 0;
      }
      .content-wrapper {
          
        color: #333;
        font-size: 14px;
        padding-bottom: 0;
      }
      .bottom-wrapper {
          
        width: 100%;
      }
      .button-wrapper {
          
        margin: 0;
      }
      .el-form-item {
          
        margin-bottom: 5px;
      }
      .bottom-wrapper .button-wrapper {
          
        margin-top: 0;
      }
    </style>

说明：我们只有轮询查看支付状态，接下来我们处理支付查询接口

**D、添加查询 api 请求**

在 /api/weixin.js 文件添加方法

queryPayStatus(orderId) {
        
        return request({
        
            url: `/api/order/weixin/queryPayStatus/${
        orderId}`,
            method: 'get'
        })
    },

### 3. 处理支付结果 ###

**A、支付查询**

① 添加 service 接口与实现

在 WeixinService 类添加接口

/**
     * 根据订单号去微信第三方查询支付状态
     */
    Map queryPayStatus(Long orderId, String paymentType);

在WeixinServiceImpl类添加实现

@Override
    public Map queryPayStatus(Long orderId, String paymentType) {
        
        try {
        
            OrderInfo orderInfo = orderService.getById(orderId);
            //1、封装参数
            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());
            //2、设置请求
            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Map
            String xml = client.getContent();
            Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);
            //4、返回
            return resultMap;
        } catch (Exception e) {
        
            return null;
        }
    }

② 添加 controller 方法

在 WeixinController 类添加方法

@Autowired
    private PaymentService paymentService;
    @ApiOperation(value = "查询支付状态")
    @GetMapping("/queryPayStatus/{orderId}")
    public Result queryPayStatus(
            @ApiParam(name = "orderId", value = "订单id", required = true)
            @PathVariable("orderId") Long orderId) {
        
        //调用查询接口
        Map<String, String> resultMap = weixinPayService.queryPayStatus(orderId, PaymentTypeEnum.WEIXIN.name());
        if (resultMap == null) {
        //出错
            return Result.fail().message("支付出错");
        }
        if ("SUCCESS".equals(resultMap.get("trade_state"))) {
        //如果成功
            //更改订单状态，处理支付结果
            String out_trade_no = resultMap.get("out_trade_no");
            paymentService.paySuccess(out_trade_no, PaymentTypeEnum.WEIXIN.getStatus(), resultMap);
            return Result.ok().message("支付成功");
        }
        return Result.ok().message("支付中");
    }

说明：如果支付成功，我们要更新支付状态、通知医院该预约单已经支付成功

**B、处理支付成功逻辑**

① 添加 service 接口与实现

在 PaymentService 类添加接口

/**
     * 支付成功
     */
    void paySuccess(String outTradeNo, Integer paymentType, Map<String, String> paramMap);

在 PaymentServiceImpl 类添加实现

/**
     * 支付成功
     */
    @Override
    public void paySuccess(String outTradeNo,Integer paymentType, Map<String,String> paramMap) {
        
        PaymentInfo paymentInfo = this.getPaymentInfo(outTradeNo, paymentType);
        if (null == paymentInfo) {
        
            throw new YyghException(ResultCodeEnum.PARAM_ERROR);
        }
        if (paymentInfo.getPaymentStatus() != PaymentStatusEnum.UNPAID.getStatus()) {
        
            return;
        }
        //修改支付状态
        PaymentInfo paymentInfoUpd = new PaymentInfo();
        paymentInfoUpd.setPaymentStatus(PaymentStatusEnum.PAID.getStatus());
        paymentInfoUpd.setTradeNo(paramMap.get("transaction_id"));
        paymentInfoUpd.setCallbackTime(new Date());
        paymentInfoUpd.setCallbackContent(paramMap.toString());
        this.updatePaymentInfo(outTradeNo, paymentInfoUpd);
        //修改订单状态
        OrderInfo orderInfo = orderService.getById(paymentInfo.getOrderId());
        orderInfo.setOrderStatus(OrderStatusEnum.PAID.getStatus());
        orderService.updateById(orderInfo);
        // 调用医院接口，通知更新支付状态
    }
    /**
     * 获取支付记录
     */
    private PaymentInfo getPaymentInfo(String outTradeNo, Integer paymentType) {
        
        QueryWrapper<PaymentInfo> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("out_trade_no", outTradeNo);
        queryWrapper.eq("payment_type", paymentType);
        return baseMapper.selectOne(queryWrapper);
    }
    /**
     * 更改支付记录
     */
    private void updatePaymentInfo(String outTradeNo, PaymentInfo paymentInfoUpd) {
        
        QueryWrapper<PaymentInfo> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("out_trade_no", outTradeNo);
        baseMapper.update(paymentInfoUpd, queryWrapper);
    }

② 更新医院支付状态

参考《尚医通API接口文档.docx》业务接口

**C、更新支付状态**

/**
     * 支付成功
     */
    @Override
    public void paySuccess(String outTradeNo,Integer paymentType, Map<String,String> paramMap) {
        
        PaymentInfo paymentInfo = this.getPaymentInfo(outTradeNo, paymentType);
        if (null == paymentInfo) {
        
            throw new YyghException(ResultCodeEnum.PARAM_ERROR);
        }
        if (paymentInfo.getPaymentStatus() != PaymentStatusEnum.UNPAID.getStatus()) {
        
            return;
        }
        //修改支付状态
        PaymentInfo paymentInfoUpd = new PaymentInfo();
        paymentInfoUpd.setPaymentStatus(PaymentStatusEnum.PAID.getStatus());
        paymentInfoUpd.setTradeNo(paramMap.get("transaction_id"));
        paymentInfoUpd.setCallbackTime(new Date());
        paymentInfoUpd.setCallbackContent(paramMap.toString());
        this.updatePaymentInfo(outTradeNo, paymentInfoUpd);
        //修改订单状态
        OrderInfo orderInfo = orderService.getById(paymentInfo.getOrderId());
        orderInfo.setOrderStatus(OrderStatusEnum.PAID.getStatus());
        orderService.updateById(orderInfo);
        // 调用医院接口，通知更新支付状态
        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());
        }
    }

## 三、取消预约 ##

### 1. 需求描述 ###

取消订单分两种情况：

*  未支付取消订单，直接通知医院更新取消预约状态
 *  已支付取消订单，先退款给用户，然后通知医院更新取消预约状态

### 2. 开发微信退款接口 ###

参考文档：[https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9\_4][https_pay.weixin.qq.com_wiki_doc_api_jsapi.php_chapter_9_4]该接口需要使用证书，详情参考文档并下载证书

**A、配置证书**

请下载的证书放在s ervice-order 模块 /resources/cert 文件夹下，在 application.properties 文件配置证书路径

weixin.cert= C:\\yygh_parent\\service\\service_order\\src\\main\\resources\\cert\\apiclient_cert.p12

**B、添加获取支付记录接口**

退款我们是根据支付记录发起退款的

在PaymentService类添加接口

/**
     * 获取支付记录
     * @param orderId
    * @param paymentType
    * @return
    */
    PaymentInfo getPaymentInfo(Long orderId, Integer paymentType);

在 PaymentServiceImpl 类添加实现

@Override
    public PaymentInfo getPaymentInfo(Long orderId, Integer paymentType) {
        
        QueryWrapper<PaymentInfo> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("order_id", orderId);
        queryWrapper.eq("payment_type", paymentType);
        return baseMapper.selectOne(queryWrapper);
    }

**C、添加退款记录**

① 添加 mapper

public interface RefundInfoMapper extends BaseMapper<RefundInfo> {
        
    }

② 添加 service 接口与实现

添加 service 接口

public interface RefundInfoService extends IService<RefundInfo> {
        
        /**
         * 保存退款记录
         * @param paymentInfo
         */
        RefundInfo saveRefundInfo(PaymentInfo paymentInfo);
    }

添加 service 接口实现

@Service
    public class RefundInfoServiceImpl extends ServiceImpl<RefundInfoMapper, RefundInfo> implements RefundInfoService {
        
    
        @Autowired
        private RefundInfoMapper refundInfoMapper;
    
        @Override
        public RefundInfo saveRefundInfo(PaymentInfo paymentInfo) {
        
            QueryWrapper<RefundInfo> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("order_id", paymentInfo.getOrderId());
            queryWrapper.eq("payment_type", paymentInfo.getPaymentType());
            RefundInfo refundInfo = refundInfoMapper.selectOne(queryWrapper);
            if(null != refundInfo) return refundInfo;
            // 保存交易记录
            refundInfo = new RefundInfo();
            refundInfo.setCreateTime(new Date());
            refundInfo.setOrderId(paymentInfo.getOrderId());
            refundInfo.setPaymentType(paymentInfo.getPaymentType());
            refundInfo.setOutTradeNo(paymentInfo.getOutTradeNo());
            refundInfo.setRefundStatus(RefundStatusEnum.UNREFUND.getStatus());
            refundInfo.setSubject(paymentInfo.getSubject());
    		//paymentInfo.setSubject("test");
            refundInfo.setTotalAmount(paymentInfo.getTotalAmount());
            refundInfoMapper.insert(refundInfo);
            return refundInfo;
        }
    }

**D、添加微信退款接口**

在 WeixinService 添加接口

/***
     * 退款
     * @param orderId
     * @return
     */
    Boolean refund(Long orderId);

在 WeixinServiceImpl 添加实现

@Override
    public Boolean refund(Long orderId) {
        
            try {
        
                PaymentInfo paymentInfoQuery = paymentService.getPaymentInfo(orderId, PaymentTypeEnum.WEIXIN.getStatus());
    
                RefundInfo refundInfo = refundInfoService.saveRefundInfo(paymentInfoQuery);
                if(refundInfo.getRefundStatus().intValue() == RefundStatusEnum.REFUND.getStatus().intValue()) {
        
                    return true;
                }
                Map<String,String> paramMap = new HashMap<>(8);
                paramMap.put("appid",ConstantPropertiesUtils.APPID);       //公众账号ID
                paramMap.put("mch_id",ConstantPropertiesUtils.PARTNER);   //商户编号
                paramMap.put("nonce_str",WXPayUtil.generateNonceStr());
                paramMap.put("transaction_id",paymentInfoQuery.getTradeNo()); //微信订单号
                paramMap.put("out_trade_no",paymentInfoQuery.getOutTradeNo()); //商户订单编号
                paramMap.put("out_refund_no","tk"+paymentInfoQuery.getOutTradeNo()); //商户退款单号
    //       	paramMap.put("total_fee",paymentInfoQuery.getTotalAmount().multiply(new BigDecimal("100")).longValue()+"");
    //       	paramMap.put("refund_fee",paymentInfoQuery.getTotalAmount().multiply(new BigDecimal("100")).longValue()+"");
                paramMap.put("total_fee","1");
                paramMap.put("refund_fee","1");
                String paramXml = WXPayUtil.generateSignedXml(paramMap,ConstantPropertiesUtils.PARTNERKEY);
                HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/secapi/pay/refund");
                client.setXmlParam(paramXml);
                client.setHttps(true);
                client.setCert(true);
                client.setCertPassword(ConstantPropertiesUtils.PARTNER);
                client.post();
    			//3、返回第三方的数据
                String xml = client.getContent();
                Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);
                if (null != resultMap && WXPayConstants.SUCCESS.equalsIgnoreCase(resultMap.get("result_code"))) {
        
                    refundInfo.setCallbackTime(new Date());
                    refundInfo.setTradeNo(resultMap.get("refund_id"));
                    refundInfo.setRefundStatus(RefundStatusEnum.REFUND.getStatus());
                    refundInfo.setCallbackContent(JSONObject.toJSONString(resultMap));
                    refundInfoService.updateById(refundInfo);
                    return true;
                }
                return false;
            }  catch (Exception e) {
        
                e.printStackTrace();
            }
            return false;
    }

**E、完成取消预约**

参考《尚医通API接口文档.docx》业务接口：取消预约

① 添加service接口与实现

在 OrderService 添加接口

/**
     * 取消订单
     * @param orderId
     */
    Boolean cancelOrder(Long orderId);

在 OrderServiceImpl 添加实现

@Override
    public Boolean cancelOrder(Long orderId) {
        
            OrderInfo orderInfo = this.getById(orderId);
    		//当前时间大约退号时间，不能取消预约
            DateTime quitTime = new DateTime(orderInfo.getQuitTime());
            if(quitTime.isBeforeNow()) {
        
                throw new YyghException(ResultCodeEnum.CANCEL_ORDER_NO);
            }
            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");
    
            if(result.getInteger("code") != 200) {
        
                throw new YyghException(result.getString("message"), ResultCodeEnum.FAIL.getCode());
            } else {
        
    			//是否支付 退款
                if(orderInfo.getOrderStatus().intValue() == OrderStatusEnum.PAID.getStatus().intValue()) {
        
    				//已支付 退款
                    boolean isRefund = weixinService.refund(orderId);
                    if(!isRefund) {
        
                        throw new YyghException(ResultCodeEnum.CANCEL_ORDER_FAIL);
                    }
                }
    			//更改订单状态
                orderInfo.setOrderStatus(OrderStatusEnum.CANCLE.getStatus());
                this.updateById(orderInfo);
    			//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
                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);
            }
            return true;
    }

② 添加 controller 方法

在 OrderApiController 添加方法

@ApiOperation(value = "取消预约")
    @GetMapping("auth/cancelOrder/{orderId}")
    public Result cancelOrder(
            @ApiParam(name = "orderId", value = "订单id", required = true)
            @PathVariable("orderId") Long orderId) {
        
        return Result.ok(orderService.cancelOrder(orderId));
    }

**F、修改监听**

操作：service-hosp模块

修改 HospitalReceiver 类

@RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = MqConst.QUEUE_ORDER, durable = "true"),
            exchange = @Exchange(value = MqConst.EXCHANGE_DIRECT_ORDER),
            key = {
        MqConst.ROUTING_ORDER}
    ))
    public void receiver(OrderMqVo orderMqVo, Message message, Channel channel) throws IOException {
        
        if(null != orderMqVo.getAvailableNumber()) {
        
            //下单成功更新预约数
            Schedule schedule = scheduleService.getScheduleId(orderMqVo.getScheduleId());
            schedule.setReservedNumber(orderMqVo.getReservedNumber());
            schedule.setAvailableNumber(orderMqVo.getAvailableNumber());
            scheduleService.update(schedule);
        } else {
        
            //取消预约更新预约数
            Schedule schedule = scheduleService.getScheduleId(orderMqVo.getScheduleId());
            int availableNumber = schedule.getAvailableNumber().intValue() + 1;
            schedule.setAvailableNumber(availableNumber);
            scheduleService.update(schedule);
        }
        //发送短信
        MsmVo msmVo = orderMqVo.getMsmVo();
        if(null != msmVo) {
        
            rabbitService.sendMessage(MqConst.EXCHANGE_DIRECT_MSM, MqConst.ROUTING_MSM_ITEM, msmVo);
        }
    }

### 3. 前端 ###

**A、封装 api 请求**

添加 /api/weixin.js 文件

cancelOrder(orderId) {
        
        return request({
        
            url: `/api/order/orderInfo/auth/cancelOrder/${
        orderId}`,
            method: 'get'
        })
    },

**B、页面展示**

修改 /pages/order/show.vue 组件

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')
      })
    }

[https_pay.weixin.qq.com_wiki_doc_api_index.html]: https://pay.weixin.qq.com/wiki/doc/api/index.html
[https_pay.weixin.qq.com_wiki_doc_api_jsapi.php_chapter_9_4]: https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_4