后端请求第三方接口，并json形式传输数据

private String getToken(String name, String newPw, String ip) {
    Map<String,String> map = new HashMap<>();

    String url = "要访问的接口";

    String jsonStr = "{"user":""+name+"","password":""+newPw+""}";

    RequestConfig config = RequestConfig.custom().setSocketTimeout(40000).setConnectTimeout(40000).setConnectTimeout(40000).build();
    HttpClient httpClient;
    httpClient = createCloseableHttpClient(url,config);
    HttpUriRequest httpMethod = null;
    HttpPost pMethod = new HttpPost(url);
    pMethod.setConfig(config);


    try {
        //进行json的转换
        pMethod.addHeader("Content-Type","application/json;charset=utf-8");
        // String s = jsonObject.toString();
        StringEntity entity = new StringEntity(jsonStr,ContentType.APPLICATION_JSON);
        pMethod.setEntity(entity);


        httpMethod = pMethod;
        HttpResponse resp = httpClient.execute(httpMethod);
        Integer statusCode = resp.getStatusLine().getStatusCode();
        String respContent = IOUtils.toString(resp.getEntity().getContent(),"utf-8");
        respContent = respContent==null?"":respContent;
      
        System.out.println(respContent);
        System.out.println(statusCode.toString());
        Gson gson = new Gson();
        map = gson.fromJson(respContent,map.getClass());

        System.out.println("token value "+map.get("token"));


    } catch (Exception e) {
        e.printStackTrace();
    }
    return map.get("token");
}

/**
 * 忽略证书的方法
 * @param url
 * @param config
 * @return
 */
private static HttpClient createCloseableHttpClient(String url, RequestConfig config) {
    HttpClientBuilder builder = HttpClients.custom();
    builder.setDefaultRequestConfig(config);
    if(url.startsWith("https")){
        try {
            SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
                @Override
                public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
                    return true;
                }
            }).build();

            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext,SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

            builder.setSSLSocketFactory(sslsf);

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        } catch (KeyStoreException e) {
            e.printStackTrace();
        }

    }
    return builder.build();
}

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