/** * 获取预支付id * @param response */ @Override public String getPrepayId( String ipAddr,HttpServletResponse response) throws IOException, NoSuchAlgorithmException, SignatureException, InvalidKeyException { // 加载商户私钥（privateKey：私钥字符串） PrivateKey merchantPrivateKey = PemUtil .loadPrivateKey(new ByteArrayInputStream(weixinpayProperties.getPrivateKey().getBytes("utf-8"))); // 加载平台证书（mchId：商户号,mchSerialNo：商户证书序列号,apiV3Key：V3密钥） AutoUpdateCertificatesVerifier verifier = new AutoUpdateCertificatesVerifier( new WechatPay2Credentials(weixinpayProperties.getMchId(), new PrivateKeySigner(weixinpayProperties.getMchSerialNo(), merchantPrivateKey)),weixinpayProperties.getApiKey().getBytes("utf-8")); // 初始化httpClient HttpClient httpClient = WechatPayHttpClientBuilder.create() .withMerchant(weixinpayProperties.getMchId(), weixinpayProperties.getMchSerialNo(), merchantPrivateKey) .withValidator(new WechatPay2Validator(verifier)).build(); // 请求URL HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi"); httpPost.setHeader("Accept", "application/json"); httpPost.setHeader("Content-Type", "application/json"); // 订单名称，必填 String subject = "福利兑换测试商品"; // 付款金额，必填 int totalAmount = 1; // 商品描述，可空 String body = subject + "；"; String outTradeNo = IdUtil.fastSimpleUUID(); // 公用回传参数 String passbackParams = "123456"; Map reqDataMap = new HashMap(); reqDataMap.put("appid", weixinpayProperties.getAppId()); reqDataMap.put("mchid", weixinpayProperties.getMchId()); reqDataMap.put("description", body); reqDataMap.put("out_trade_no", outTradeNo); // reqDataMap.put("attach", passbackParams); reqDataMap.put("notify_url", weixinpayProperties.getNotifyUrl()); Map amountMap = new HashMap(); amountMap.put("total", totalAmount); amountMap.put("currency", "CNY"); reqDataMap.put("amount", amountMap); Map payer = new HashMap(); payer.put("openid", "oHj106RQfovPJ549Xhd-iVn2FIns"); reqDataMap.put("payer", payer); // Map sceneInfoMap = new HashMap(); // sceneInfoMap.put("payer_client_ip", ipAddr); // Map h5InfoMap = new HashMap(); // h5InfoMap.put("type", "MWEB"); // sceneInfoMap.put("h5_info", h5InfoMap); // reqDataMap.put("scene_info", sceneInfoMap); logger.warn("请求参数：{}", JSONObject.toJSONString(reqDataMap)); StringEntity entity = new StringEntity(JSONObject.toJSONString(reqDataMap),"utf-8"); logger.warn("请求参数实体：{}", JSONObject.toJSONString(entity)); httpPost.setEntity(entity); entity.setContentType("application/json"); Header[] allHeaders = httpPost.getAllHeaders(); logger.warn("allHeaders=============={}",JSONUtil.toJsonStr(allHeaders)); // String token = WeixinTokenUtil.getToken("POST", "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi", JSONObject.toJSONString(reqDataMap)); // logger.warn("获取到的token:{}", token); // httpPost.setHeader("Authorization", token); // 完成签名并执行请求 HttpResponse payResponse = httpClient.execute(httpPost); Header[] allHeaders2 = httpPost.getAllHeaders(); logger.warn("allHeaders2=============={}",JSONUtil.toJsonStr(allHeaders2)); int statusCode = payResponse.getStatusLine().getStatusCode(); logger.warn("statusCode：{}", statusCode); String prepay_id = ""; if (statusCode == 200) { logger.warn("success,return body {} ", EntityUtils.toString(payResponse.getEntity())); prepay_id = JSONObject.parseObject(EntityUtils.toString(payResponse.getEntity())).get("prepay_id").toString(); logger.warn("prepay_id {} ", prepay_id); // response.getWriter().write(h5_url); } else if (statusCode == 204) { logger.warn("success"); } else { logger.warn("failed,resp code = " + statusCode + ",return body = " + JSONObject.toJSONString(payResponse)); throw new IOException("request failed"); } return prepay_id; } 错误日志，找不到错误原因？ resp code = 400,return body = {"allHeaders":[{"buffer":{"empty":false,"full":false},"elements":[{"name":"nginx","parameterCount":0,"parameters":[]}],"name":"Server","value":"nginx","valuePos":7},{"buffer":{"empty":false,"full":false},"elements":[{"name":"Sat","parameterCount":0,"parameters":[]},{"name":"04 Jan 2025 03:10:19 GMT","parameterCount":0,"parameters":[]}],"name":"Date","value":"Sat, 04 Jan 2025 03:10:19 GMT","valuePos":5},{"buffer":{"empty":false,"full":false},"elements":[{"name":"application/json","parameterCount":1,"parameters":[{"name":"charset","value":"utf-8"}]}],"name":"Content-Type","value":"application/json; charset=utf-8","valuePos":13},{"buffer":{"empty":false,"full":false},"elements":[{"name":"58","parameterCount":0,"parameters":[]}],"name":"Content-Length","value":"58","valuePos":15},{"buffer":{"empty":false,"full":false},"elements":[{"name":"keep-alive","parameterCount":0,"parameters":[]}],"name":"Connection","value":"keep-alive","valuePos":11},{"buffer":{"empty":false,"full":false},"elements":[{"name":"timeout","parameterCount":0,"parameters":[],"value":"8"}],"name":"Keep-Alive","value":"timeout=8","valuePos":11},{"buffer":{"empty":false,"full":false},"elements":[{"name":"no-cache","parameterCount":0,"parameters":[]},{"name":"must-revalidate","parameterCount":0,"parameters":[]}],"name":"Cache-Control","value":"no-cache, must-revalidate","valuePos":14},{"buffer":{"empty":false,"full":false},"elements":[{"name":"nosniff","parameterCount":0,"parameters":[]}],"name":"X-Content-Type-Options","value":"nosniff","valuePos":23},{"buffer":{"empty":false,"full":false},"elements":[{"name":"089BCDE2BB0610B6031896CD8C58209FA00E28F68E03-268501091","parameterCount":0,"parameters":[]}],"name":"Request-ID","value":"089BCDE2BB0610B6031896CD8C58209FA00E28F68E03-268501091","valuePos":11},{"buffer":{"empty":false,"full":false},"elements":[{"name":"zh-CN","parameterCount":0,"parameters":[]}],"name":"Content-Language","value":"zh-CN","valuePos":17},{"buffer":{"empty":false,"full":false},"elements":[{"name":"46dd8158e7c75b1798e6c44fb5692707","parameterCount":0,"parameters":[]}],"name":"Wechatpay-Nonce","value":"46dd8158e7c75b1798e6c44fb5692707","valuePos":16},{"buffer":{"empty":false,"full":true},"elements":[{"name":"F311nyMKh6n5W0FJuWR8JisX0xyPjQlaiExUi+/137ntNU2Yz0kVFOB8MXxLBcono0Fasb5Ezgfj2qnSnpEQlVeKVtH8dEalKT75s9UXCsTNFUCAcW+/eDI/i8kdSWUyHqnMQdVNX4a3hx2hiS6E78iuDH4GuRTew5HEToKX1WOeD+ETQ1bAeF0ry0HVXCNDdM4xncMZL2pOnQqGgvjjjXo9UM8KYMQ1lz7OzH6eK0bJWnkuly7Bv45b5BaUPB7OmVQ1zS+EC7XMk7ivpcHWLVSVmA3Jpij4ojZ6Q4gysMsGjSF58oTT9M9Diqdxn2jXeUExd8z6khzd0LFk+I0DjA","parameterCount":0,"parameters":[],"value":"="}],"name":"Wechatpay-Signature","value":"F311nyMKh6n5W0FJuWR8JisX0xyPjQlaiExUi+/137ntNU2Yz0kVFOB8MXxLBcono0Fasb5Ezgfj2qnSnpEQlVeKVtH8dEalKT75s9UXCsTNFUCAcW+/eDI/i8kdSWUyHqnMQdVNX4a3hx2hiS6E78iuDH4GuRTew5HEToKX1WOeD+ETQ1bAeF0ry0HVXCNDdM4xncMZL2pOnQqGgvjjjXo9UM8KYMQ1lz7OzH6eK0bJWnkuly7Bv45b5BaUPB7OmVQ1zS+EC7XMk7ivpcHWLVSVmA3Jpij4ojZ6Q4gysMsGjSF58oTT9M9Diqdxn2jXeUExd8z6khzd0LFk+I0DjA==","valuePos":20},{"buffer":{"empty":false,"full":false},"elements":[{"name":"1735960219","parameterCount":0,"parameters":[]}],"name":"Wechatpay-Timestamp","value":"1735960219","valuePos":20},{"buffer":{"empty":false,"full":false},"elements":[{"name":"53ACA85B1F0054C927E51A48FC2C69D16D7A2886","parameterCount":0,"parameters":[]}],"name":"Wechatpay-Serial","value":"53ACA85B1F0054C927E51A48FC2C69D16D7A2886","valuePos":17},{"buffer":{"empty":false,"full":false},"elements":[{"name":"WECHATPAY2-SHA256-RSA2048","parameterCount":0,"parameters":[]}],"name":"Wechatpay-Signature-Type","value":"WECHATPAY2-SHA256-RSA2048","valuePos":25}],"entity":{"chunked":false,"contentLength":58,"contentType":{"$ref":"$.allHeaders[2]"},"repeatable":false,"streaming":true},"locale":"en_US","params":{"names":[]},"protocolVersion":{"major":1,"minor":1,"protocol":"HTTP"},"statusLine":{"protocolVersion":{"$ref":"$.protocolVersion"},"reasonPhrase":"Bad Request","statusCode":400}}