Java SDK

ResponseEntityProxy{[Content-Type: application/json; charset=utf-8,Content-Length: 71,Chunked: false]} 返回体 的String字符串

代码：

CertificatesManager certificatesManager = CertificatesManager.getInstance();
// 向证书管理器增加需要自动更新平台证书的商户信息
certificatesManager.putMerchant(merchantId, new WechatPay2Credentials(merchantId,
        new PrivateKeySigner(merchantSerialNumber, merchantPrivateKey)), apiV3.getBytes(StandardCharsets.UTF_8));
// ... 若有多个商户号，可继续调用putMerchant添加商户信息

// 从证书管理器中获取verifier
Verifier verifier = certificatesManager.getVerifier(merchantId);
WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
        .withMerchant(merchantId, merchantSerialNumber, merchantPrivateKey)
        .withValidator(new WechatPay2Validator(verifier));
// ... 接下来，你仍然可以通过builder设置各种参数，来配置你的HttpClient

// 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
CloseableHttpClient httpClient = builder.build();

HttpPost httpPost = new HttpPost(url);

httpPost.setHeader("Content-Type", "application/json");
HttpEntity entity = new StringEntity(json, StandardCharsets.UTF_8);
httpPost.setEntity(entity);

try {
    CloseableHttpResponse response = httpClient.execute(httpPost);
    return response;