微信H5支付

男娘i 2023-07-12 09:19 35阅读 0赞

#### 1. 调起微信支付的域名要和微信支付配置的一致,导致无法本地测试 ####

#### 解决方案： 修改本地host文件将配置的域名指向本机, 手机wifi使用本机代理上网。 ####

### [IJPay-All文档地址][IJPay-All] ###

#### 1. maven中引入开发包 ####

<dependency>
        <groupId>com.github.javen205</groupId>
        <artifactId>IJPay-WxPay</artifactId>
        <version>2.4.0</version>
    </dependency>

#### 2. 创建请求需要的参数类。配置信息在application中 ####

import lombok.Data;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Configuration;
    
    @Data
    @Configuration
    public class WxPayProperties { 
        /** * 设置微信公众号或者小程序，h5等的appid. */
        @Value("${wx.pay.appId}")
        private String appId;
    
        /** * 微信支付商户号. */
        @Value("${wx.pay.mchId}")
        private String mchId;
    
        /** * 微信支付商户密钥. */
        @Value("${wx.pay.mchKey}")
        private String mchKey;
    
        /** * 异步回调地址 */
        @Value("${wx.pay.notifyUrl}")
        private String notifyUrl;
    }

##### application配置文件 如下 #####

wx:
      pay:
        appId: wx12334332341 # appid
        mchId: 123344123 # 商户号
        mchKey: U6gG1CqAqweffffxH8eMuDrvfXFBokr # 秘钥 微信商户平台(pay.weixin.qq.com)-->账户设置-->API安全-->密钥设置
        notifyUrl: http://169b91h550.imwork.net:35084/wx/wxPayNotice #可以被外网访问的接口

#### 3. 请求示例 ####

// 支付金额
            BigDecimal paymentAmount = new BigDecimal("0.01");
            // 支付ip
            String ip = getIpAddr();
            // 创建商户订单号
            String platformOrderNumber = WxPayKit.generateStr();
            Map<String, String> params = UnifiedOrderModel
                    .builder()
                    .appid(wxPayProperties.getAppId())
                    .mch_id(wxPayProperties.getMchId())
                    .nonce_str(platformOrderNumber) // 随机字符串
                    .body("微信支付")
                    .out_trade_no(platformOrderNumber)
                    .total_fee(String.valueOf((paymentAmount.multiply(new BigDecimal("100"))).intValue()))
                    .spbill_create_ip(ip)
                    .notify_url(wxPayProperties.getNotifyUrl())
                    .trade_type(TradeType.MWEB.getTradeType())
                    .build()
                    .createSign(wxPayProperties.getMchKey(), SignType.MD5);
            String xmlResult = WxPayApi.pushOrder(false, params);
            Map<String, String> resultMap = WxPayKit.xmlToMap(xmlResult);
            if (StringUtils.equals(resultMap.get("return_code"),"SUCCESS")) { 
                // 下单成功 
                // 前端重定向的地址 js使用 window.location.href 跳转此地址就行了 
        
                String url = resultMap.get("mweb_url") + "&redirect_url=http://www.baidu.com"
                ....
             }

#### redirect\_url 为支付成功和支付失败后的重定向地址 ####

##### 获取客户端IP地址 #####

private String getIpAddr() { 
            String ip = request.getHeader("x-forwarded-for");
            if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) { 
                // 多次反向代理后会有多个ip值，第一个ip才是真实ip
                if (ip.indexOf(",") != -1) { 
                    ip = ip.split(",")[0];
                }
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getHeader("X-Real-IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getRemoteAddr();
            }
            return ip != null ? ip : "192.168.0.1";
        }

#### 异步通知 ####

@PostMapping("/notifyUrl")
        public void notifyUrl(@RequestBody String xmlData) { 
            Map<String, String> resultMap = WxPayKit.xmlToMap(xmlData);
             // 平台订单号
            String platformOrderNumber =  resultMap.get("out_trade_no");
            // 实际支付金额
            BigDecimal paymentAmount = new BigDecimal(resultMap.get("cash_fee"));
            // 微信订单号
            String transactionId =  resultMap.get("transaction_id");
            // 支付完成时间
            String timeEnd =  resultMap.get("timeEnd");
            ....
        }

[IJPay-All]: https://javen205.gitee.io/ijpay/