集思录量化交易接口-微信支付V3下载交易账单

众所周知，腾讯的文档是给内部人员看的，官方Demo不够完全，以致新手入门困难，这里通过调用第三方封装接口，将部分流程进行简化

Maven引入


<dependency>
    <groupId>com.github.javen205</groupId>
    <artifactId>IJPay-All</artifactId>
    <version>2.7.4</version>
</dependency>

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>2.0.25</version>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.24</version>
</dependency>

功能：下载交易账单

申请交易账单核心方法

    /**
     * 申请交易账单
     *
     * @param billDate 账单日期（仅支持三个月内的账单下载申请）
     * @return 交易账单返参
     */
    public WechatTradeBillDownloadResp tradeBill(String billDate) {
        try {
            if (CharSequenceUtil.isEmpty(billDate)) {
                Calendar calendar = Calendar.getInstance();
                calendar.setTime(new Date());
                calendar.add(Calendar.DATE, -1);
                billDate = DateUtil.format(calendar.getTime(), "YYYY-MM-dd");
            }
            Map<String, String> params = new HashMap<>(12);
            params.put("bill_date", billDate);
            params.put("bill_type", "ALL");
            // 返回格式为.gzip的压缩包账单，不设置默认为数据流
            //params.put("tar_type", "GZIP");

            IJPayHttpResponse result = WxPayApi.v3(
                    RequestMethod.GET,
                    WxDomain.CHINA.getType(),
                    WxApiType.TRADE_BILL.toString(),
                    wechatConfig.getMchId(),
                    wechatConfig.getSerialNo(),
                    null,
                    getPrivateKey(),
                    params
            );
            // 根据证书序列号查询对应的证书来验证签名结果
            checkedSignature(result);

            if (result.getStatus() != 200) {
                throw new RuntimeException("申请交易账单失败，" + result.getBody());
            }

            return JSON.parseObject(result.getBody(), WechatTradeBillDownloadResp.class);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

下载交易账单核心方法

 /**
     * 下载交易账单
     *
     * @param token token
     * @return 交易账单数据
     */
    public HttpResponse billDownload(String token) throws Exception {
        long timestamp = System.currentTimeMillis() / 1000;
        String authType = "WECHATPAY2-SHA256-RSA2048";
        // 生成随机字符串
        String nonceStr = WxPayKit.generateStr();

        String urlSuffix = WxApiType.BILL_DOWNLOAD.toString().concat("?").concat("token=" + token);

        // 拼接url
        String url = WxDomain.CHINA.getType() + urlSuffix;

        // 构建签名
        String authorization = WxPayKit.buildAuthorization(RequestMethod.GET, urlSuffix,
                wechatConfig.getMchId(), wechatConfig.getSerialNo(),
                getPrivateKey(), "", nonceStr, timestamp, authType);

        Map<String, String> headers = WxPayApi.getHeaders(authorization, wechatConfig.getSerialNo());

        return HttpRequest.get(url).addHeaders(headers).execute();
    }

public TradeBillDataResp downloadTradeBill(String date) {

        WechatPayV3 wechatPayV3 = new WechatPayV3(wechatConfig);
        // 申请交易账单
        WechatTradeBillDownloadResp wechatTradeBillDownloadResp = wechatPayV3.tradeBill(date);

        // 解析交易账单下载地址，获取token
        String downloadUrl = wechatTradeBillDownloadResp.getDownloadUrl();
        UrlBuilder urlBuilder = UrlBuilder.ofHttp(downloadUrl, CharsetUtil.CHARSET_UTF_8);
        String token = urlBuilder.getQuery().get("token").toString();

        try (
                // 获取交易账单数据流
                HttpResponse httpResponse = wechatPayV3.billDownload(token);
        ) {

            if (httpResponse.getStatus() != 200){
                return null;
            }

            // 异步备份交易账单文件(建议使用线程池，此处简略操作)
            new Thread(() -> {
                File folder = new File(WECHAT_TEMP_PATH);
                if (!folder.exists() && !folder.isDirectory()) {
                    boolean mkdirs = folder.mkdirs();
                    Assert.isTrue(mkdirs, "创建微信交易账单文件夹失败");
                }

                // 文件名
                String targetPath = WECHAT_TEMP_PATH.concat(wechatConfig.getMchId())
                        .concat("All")
                        .concat(date)
                        .concat(".csv");
                IOUtil.backUpFile(httpResponse.bodyStream(), targetPath);
            });

            // 解析数据流
            return parseBody(httpResponse.body());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

  @GetMapping("/downloadTradeBill")
  TradeBillDataResp downloadTradeBill(@RequestParam String date) {
      return wechatBillService.downloadTradeBill(date);
  }

测试

文章为作者独立观点，不代表股票配资公司观点

集思录量化交易接口-C++量化系统开发工程师年base