SpringBoot+Vue实现微信扫码支付、退款功能-轻识

直接上代码，在order模块添加依赖

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

在配置类添加申请的商家号信息

#关联的公众号appidweixin.pay.appid=wxXXXXXXX#商户号weixin.pay.partner=XXXXXXXXX#商户keyweixin.pay.partnerkey=XXXXXXXXXX

添加微信生成二维码service

@Servicepublic class WeiXinServiceImpl implements WeiXinService {    @Autowired    private PaymentInfoService paymentInfoService;    @Autowired    private OrderInfoService orderInfoService;    @Autowired    private WeiXinService weiXinService;    //生成支付的二维码    @Override    public Map createNative(Long orderId) {        //支付记录表添加数据        //根据单号查询订单相关信息        OrderInfo orderInfo = orderInfoService.getById(orderId);        if (orderInfo == null){            throw new OrderException(20001,"订单不存在");        }        //添加订单状态        paymentInfoService.savePaymentInfo(orderInfo,PaymentTypeEnum.WEIXIN.getStatus());        //调用微信接口返回二维码        try {            //2 调用微信接口，得到二维码地址等信息            //封装传递微信地址参数            Map paramMap = new HashMap();            paramMap.put("appid", ConstantPropertiesUtils.APPID); //公众号id            paramMap.put("mch_id", ConstantPropertiesUtils.PARTNER); //商户号            paramMap.put("nonce_str", WXPayUtil.generateNonceStr()); //随机字符串，调用工具类             Date reserveDate = orderInfo.getReserveDate();            String reserveDateString = new DateTime(reserveDate).toString("yyyy/MM/dd");            String body = reserveDateString + "就诊"+ orderInfo.getDepname();            paramMap.put("body", body);//扫码后手机显示内容             paramMap.put("out_trade_no", orderInfo.getOutTradeNo()); //订单流水号            //paramMap.put("total_fee", order.getAmount().multiply(new BigDecimal("100")).longValue()+"");            paramMap.put("total_fee", "1");//TODO 为了测试  支付金额            paramMap.put("spbill_create_ip", "127.0.0.1");  //终端ip            paramMap.put("notify_url", "http://xxxxxxxxx");//回调地址            paramMap.put("trade_type", "NATIVE"); //二维码类型            //请求微信生成二维码接口            HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/unifiedorder");            //设置post请求相关参数            //微信支付要求传递参数xml格式            //把封装map集合变成xml，加密处理，传输            String xml = WXPayUtil.generateSignedXml(paramMap, ConstantPropertiesUtils.PARTNERKEY);            client.setXmlParam(xml);            //支持https协议            client.setHttps(true);            //发送            client.post();             //调用微信接口，返回数据,xml格式的数据            String resultXml = client.getContent();            System.out.println("微信二维码："+resultXml);            //把xml格式数据转换map            Map<String, String> resultMap = WXPayUtil.xmlToMap(resultXml);             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"));  //微信二维码地址             return map;        } catch (Exception e) {            e.printStackTrace();            throw new orderException(20001,"生成二维码失败");        }    }}

控制层

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

前端微信支付二维码，wx.js定义方法

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

显示二维码需要前端安装插件

安装npm install vue-qriously

订单详情页，修改order/show.vue组件

import weixinApi from '@/api/yygh/wx' <!-- 微信支付弹出框 -->    <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>     //生成二维码    pay() {      //弹框      this.dialogPayVisible = true      //调用接口      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 {          //每隔3秒查询一次支付状态          this.timer = setInterval(()=>{            this.queryPayStatus(this.orderId)          },3000)        }      })    },

查询订单支付状态，添加定时器方法，每隔3秒去查询一次支付状态，api

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

后端，weixinservice封装信息请求微信提供的接口，判断是否支付成功，因为微信返回的是xml文件，所以需要转换

//调用微信接口查询支付状态@Overridepublic Map queryPayStatus(Long orderId, String paymentType) {    //1 根据orderId查询订单信息    OrderInfo orderInfo = orderInfoService.getById(orderId);    if(orderInfo == null) {        throw new orderException(20001,"订单不存在");    }    try {        //2 封装微信接口需要数据        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 调用微信接口，传递数据，设置参数        HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/orderquery");        client.setXmlParam(WXPayUtil.generateSignedXml(paramMap,ConstantPropertiesUtils.PARTNERKEY));        client.setHttps(true);        client.post();
        //4 获取微信接口返回数据        String xml = client.getContent();        System.out.println("支付状态返回xml: "+xml);        Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);
        return resultMap;
    } catch (Exception e) {        e.printStackTrace();        throw new orderException(20001,"查询失败");    }}

支付成功后，更新状态

控制层，查询状态

@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");        paymentInfoService.paySuccess(out_trade_no, PaymentTypeEnum.WEIXIN.getStatus(), resultMap);        return Result.ok().message("支付成功");    }    return Result.ok().message("支付中");}

退款

退款与支付唯一不同的是需要在下载微信提供的退款证书，下载好后通过配置文件加载退款证书路径

weixin.cert=C:\\apiclient_cert.p12

weixinservice中

//退款@Overridepublic Boolean refund(Long orderId) {    //1 根据订单号查询订单支付记录信息    QueryWrapper<PaymentInfo> wrapper = new QueryWrapper<>();    wrapper.eq("order_id",orderId);    PaymentInfo paymentInfo = paymentInfoService.getOne(wrapper);
    //2 TODO 添加退款信息到退款表
    try {        //3 调用微信退款接口        //封装微信接口需要数据        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",paymentInfo.getTradeNo()); //微信订单号        paramMap.put("out_trade_no",paymentInfo.getOutTradeNo()); //商户订单编号        paramMap.put("out_refund_no","tk"+paymentInfo.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");
        //设置接口和参数        HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/secapi/pay/refund");        client.setXmlParam(WXPayUtil.generateSignedXml(paramMap,ConstantPropertiesUtils.PARTNERKEY));        client.setHttps(true);        client.setCert(true);//退款证书        client.setCertPassword(ConstantPropertiesUtils.PARTNER);//证书密码 商户key        //发送post请求        client.post();
        //4、返回退款数据        String xml = client.getContent();        Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);

    } catch (Exception e) {        e.printStackTrace();    }
    return null;}

入骨相思知不知

玲珑骰子安红豆

入我相思门，知我相思苦，长相思兮长相忆，短相思兮无穷极。