对接Content-Type="application/x-www-form-urlencoded;"的接口示例

url：调用目标接口的路径

headers:请求头属性

params：目标接口需要的入参

public static JSONObject doHttpPost(String url,Map<String, String> headers ,Map<String, String> params) {
    // 创建Httpclient对象
    CloseableHttpClient httpClient = null;
    CloseableHttpResponse response = null;
    String resultString = "";
    try {
        httpClient = HttpClients.createDefault();
        // 创建Http Post请求
        HttpPost httpPost = new HttpPost(url);
        httpPost.setHeader("X-Gaia-Api-Key",headers.get("X-Gaia-Api-Key"));//网关key
        httpPost.setHeader("Content-Type","application/x-www-form-urlencoded;");
        // 创建参数列表
        if (param != null) {
            List<NameValuePair> paramList = new ArrayList<>();
            for (String key : param.keySet()) {
                paramList.add(new BasicNameValuePair(key, param.get(key)));
            }
            // 模拟表单
            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
            httpPost.setEntity(entity);
        }
        // 执行http请求
        response = httpClient.execute(httpPost);
        resultString = EntityUtils.toString(response.getEntity(), "utf-8");
    } catch (Exception e) {
        log.error("HttpClientUtil/doPost,error:{}",e);
    } finally {
        try {
            if (response != null) {
                response.close();
            }
            if (httpClient != null) {
                httpClient.close();
            }
        } catch (IOException e) {
            log.error("HttpClientUtil/close,error:{}",e);
        }
    }
    return JSON.parseObject(resultString);
}