本文共 6234 字，大约阅读时间需要 20 分钟。

【前言】

            今天终于测试了一下获取到了miniPayReRuest，那我就分享一下了。

【实现过程】

    （1）获取参数     

static String wxXcxUrl = "https://api-mop.chinaums.com/v1/netpay/wx/unified-order";

 因为我这个接口是小程序调取的，获取的参数第一个是从小程序获取的code值，第二个参数是服务传给小程序，然后小程序再传给服务的orderId。

/**     * app下单方法-微信小程序     *     * @param wxXcxPayInfo     * @return     * @throws Exception     */    @ApiOperation(value = "App下单-微信小程序", notes = "App下单-微信小程序")    @PostMapping("/wxXcxPay")    public String placeAnOrderWxXcxPay(WxXcxPayInfo wxXcxPayInfo) throws Exception {        String code = wxXcxPayInfo.getCode();        String orderId = wxXcxPayInfo.getOrderId();        //1、首先，我们要根据code值获取到OpenId       String openId =wxXcxService.getOpenId(code);              //2、根据订单号获取商品的金额，然后传给银联的接口，返回获取MiniPayRequest，再将openId和参数一起返回。//        Order orderSellCount = orderService.getSellCountByOrderId(Long.valueOf(orderId));//        String payNum = orderSellCount.getPayNum();          Long payNumIs =1L;//        Long payNumIs = Long.valueOf(payNum);        AppXiaDanDTO appXiaDanDTO = new AppXiaDanDTO();        //获取支付的金额//        appXiaDanDTO.setPlatformAmount(BigDecimal.valueOf(payNumIs));        appXiaDanDTO.setTotalAmount(BigDecimal.valueOf(1));        //报文请求时间        appXiaDanDTO.setRequestTimestamp(DateFormatUtils.format(new Date(), "yyyy-MM-dd HH:mm:ss"));        //商户订单号//        appXiaDanDTO.setMerOrderId(orderId);        appXiaDanDTO.setMerOrderId(Util.getMerOrderId(msgSrcId));        //商户号        appXiaDanDTO.setMid(mid);        //终端号        appXiaDanDTO.setTid(tid);        //微信子商户appId//        appXiaDanDTO.setSubAppId("");        appXiaDanDTO.setSubAppId("");        //用户子标识-微信必传//        appXiaDanDTO.setSubOpenId("");        appXiaDanDTO.setSubOpenId(openId);        //交易类型        appXiaDanDTO.setTradeType("MINI");        //业务类型        appXiaDanDTO.setInstMid("MINIDEFAULT");        appXiaDanDTO.setPlatformAmount(BigDecimal.valueOf(1));        String appXiaDanDTOJson = JSONObject.toJSONString(appXiaDanDTO);        String send = appXiaDanService.send(wxXcxUrl, appXiaDanDTOJson);        return send;    }

这个code的目的就是为了获取OpenId，orderId看你们自己项目的需求即可。

（2）获取OpenId

@Service@Slf4jpublic class WxXcxServiceImpl implements WxXcxService {    @Override    public String getOpenId(String code) throws  Exception {        //通过code值获取到OpenId        Map
   
     rtnMap = new HashMap
    
     ();        String url = "https://api.weixin.qq.com/sns/jscode2session";        url+="?appid=";        url+="&secret=";        url+="&js_code="+code;        url+="&grant_type=authorization_code";        String res = null;        CloseableHttpClient httpClient = HttpClientBuilder.create().build();        //Get方式        HttpGet httpGet = new HttpGet(url);        CloseableHttpResponse response = null;        //配置信息        RequestConfig requestConfig = RequestConfig.custom()                                    .setConnectTimeout(5000)                                    .setConnectionRequestTimeout(5000)                                    .setSocketTimeout(5000)                                    .setRedirectsEnabled(false).build();        httpGet.setConfig(requestConfig);        response = httpClient.execute(httpGet);        //从响应模型中获取响应实体        HttpEntity responseEntity = response.getEntity();        System.out.println("响应状态为"+response.getStatusLine());        if (responseEntity !=null){            res = EntityUtils.toString(responseEntity);            System.out.println("响应内容长度为"+responseEntity.getContentLength());            System.out.println("响应内容为"+res);        }        //释放资源        if (httpClient!=null){            httpClient.close();        }        if (response!=null){            response.close();        }        JSONObject jo = JSON.parseObject(res);        String openid = jo.getString("openid");        System.out.println("openid"+openid);        return openid;//        return  null;    }}
    
   

(3) 银联的鉴权

@Slf4j@Service@AllArgsConstructorpublic class AppXiaDanServiceImpl implements AppXiaDanService {    static String appId = "";    static String appKey ="";    static String authorization;    @Override    public String send(String url, String entity) throws Exception {        authorization = getOpenBodySig(appId,appKey,entity);        CloseableHttpClient httpClient = HttpClients.createDefault();        HttpPost httpPost = new HttpPost(url);        httpPost.addHeader("Authorization",authorization);        StringEntity se = new StringEntity(entity,"UTF-8");        se.setContentType("application/json");        httpPost.setEntity(se);        CloseableHttpResponse response = httpClient.execute(httpPost);        HttpEntity entity1 = response.getEntity();        String resStr = null;        if (entity1!=null){            resStr = EntityUtils.toString(entity1,"UTF-8");        }        httpClient.close();        response.close();        return resStr;    }    public static String getOpenBodySig(String appId,String appKey,String body) throws Exception{        String timestamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());        String nonce = UUID.randomUUID().toString().replace("-", "");        byte[] data = body.getBytes("UTF-8");        InputStream is  = new ByteArrayInputStream(data);        String bodyDigest = testSHA256(is);        String st1_C=appId+timestamp+nonce+bodyDigest;        byte[] localSignature = hmacSHA256(st1_C.getBytes(), appKey.getBytes());        String localSignatureStr =Base64.encodeBase64String(localSignature); //Signature        return  ("OPEN-BODY-SIG AppId=" + "\"" + appId + "\"" + ", Timestamp=" + "\"" + timestamp + "\"" + ", Nonce=" + "\"" + nonce + "\"" + ", Signature=" + "\"" + localSignatureStr + "\"");    }    private static byte[] hmacSHA256(byte[] data, byte[] key) throws NoSuchAlgorithmException, InvalidKeyException {        String algorithm = "HmacSHA256";        Mac mac = Mac.getInstance(algorithm);        mac.init(new SecretKeySpec(key,algorithm));        return mac.doFinal(data);    }    /**     * 进行加密     * @param is     * @return 加密后的结果     */    private static String testSHA256(InputStream is) {        try {            return DigestUtil.sha256Hex(is);        } catch (Exception e) {            e.printStackTrace();        }        return null;    }}

【测试返回】

在这时候测试之前还需要营业执照和身份证和微信实名认证

测试结果： 

转载地址：http://hphe.baihongyu.com/