//官方提供的初始化客户端方法 无法通过 nginx //privateKeyPath 私钥路径 String privateKey = new String(Files.readAllBytes(Paths.get(privateKeyPath)), "utf-8"); PrivateKey merchantPrivateKey = PemUtil.loadPrivateKey(privateKey); //mchId 商户号 //wechatPayserialNo 证书序列号 //apiV3Key 支付密码 CertificatesManager instance = CertificatesManager.getInstance(); instance.putMerchant(mchId, new WechatPay2Credentials(mchId, new PrivateKeySigner(wechatPayserialNo, merchantPrivateKey)), apiV3Key.getBytes(StandardCharsets.UTF_8)); Verifier verifier = instance.getVerifier(mchId); httpclient = WechatPayHttpClientBuilder.create() .withMerchant(mchId, wechatPayserialNo, merchantPrivateKey) .withValidator(new WechatPay2Validator(verifier)) .build(); 此方法返回  400 Bad Request 400 Bad Request nginx 阿帕奇默认创建客户端 可以通过请求 CloseableHttpClient httpClient = HttpClients.createDefault(); 请问各路大神，导致这种情况的原因可能是什么？